DIAGNOSTICS -> ABS with EBD & BA & TRC & VSC System for Your Toyota Avensis 4 Door First Generation (1997-2003)

DI–169  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZB–01  
HOW TO PROCEED WITH TROUBLESHOOTING  
Troubleshoot in accordance with the procedure on the following pages.  
Vehicle Brought to Workshop  
Items inside  
are titles of pages in this manual,  
with the page number in the bottom portion. See  
the pages for detailed explanations.  
1
2
Customer Problem Analysis  
P. DI–170  
Check and Clear DTC (Precheck)  
P. DI–171  
Symptom  
does not occur  
Symptom Simulation  
P. IN–20  
3
4
Problem Symptom Confirmation  
Symptom  
occurs  
Normal code  
5
DTC Check  
P. DI–171  
Malfunction code  
7
6
8
Problem Symptoms Table  
P. DI–181  
DTC Chart  
P. DI–176  
9
Sensor Check  
Circuit Inspection  
Check for Fluid Leakage  
P. DI–254  
P. DI–182 – DI–252  
Identification of Problem  
Repair  
10  
11  
Confirmation Test  
End  
Diagnostic steps permitting the use of the  
hand–held tester or break–out–box.  
Step 2, 5, 8, 9, 11:  
Fail safe function:  
When a failure occurs in the ABS & BA & TRC & VSC system, the respective warning light (ABS, VSC) is lit and  
the operation of ABS & BA & TRC & VSC is prohibited. In addition to this, when the failure which disables the EBD  
operation occurs, the brake warning light is lit as well and the EBD operation is prohibited.  
AVENSIS/CORONA SUP (RM781E)  
DI–170  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZC–01  
CUSTOMER PROBLEM ANALYSIS CHECK  
ABS & BA & TRC & VSC Check Sheet  
Inspector’s  
:
Name  
Registration No.  
Registration Data  
Frame No.  
/
/
Customer’s Name  
Date Vehicle  
Brought In  
km  
Odometer Reading  
/
/
miles  
Date Problem First Occurred  
Frequency Problem Occurs  
/
/
Continuous  
Intermittent (  
times a day)  
ABS does not operate.  
ABS does not operate efficiently.  
TRC does not operate.  
VSC does not operate. (Wheels spin when starting rapidly.)  
BA does not operate.  
Symptoms  
ABS Warning Light  
Remains ON  
Remains ON  
Does not Light Up  
Does not Light Up  
Abnormal  
VSC OFF Indicator  
Light Abnormal  
VSC Warning  
Remains ON  
Remains ON  
Remains ON  
Does not Light Up  
Does not Light Up  
Does not Light Up  
Light Abnormal  
SLIP Indicator  
Light Abnormal  
BRAKE Warning  
Light Abnormal  
Malfunction  
Normal  
Check Item  
DTC Check  
Does not Light Up  
Indicator Light  
Malfunction Code (Code  
Malfunction Code (Code  
)
)
1st Time  
2nd Time  
Normal Code  
Normal Code  
AVENSIS/CORONA SUP (RM781E)  
DI–171  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZD–01  
PRE–CHECK  
1.  
DIAGNOSIS SYSTEM  
(a) Check the warning lights.  
(1) Release the parking brake lever.  
(2) When the ignition switch is turned ON, check that  
the ABS warning light, VSC warning light, VSC OFF  
indicator light, BRAKE warning light and SLIP indi-  
cator light goes on for approx. 2 seconds.  
F12737  
HINT:  
S
When the parking brake is applied or the level of the brake  
fluid is low, the BRAKE warning light is lit.  
S
If the indicator check result is not normal, proceed to trou-  
bleshooting for the ABS warning light circuit, VSC warn-  
ing light circuit, VSC OFF indicator light circuit, BRAKE  
warning light circuit or SLIP indicator light circuit.  
TroubleArea  
See page  
DI–231,DI–225  
DI–233,DI–228  
DI–243  
ABS warning light circuit  
VSC warning light circuit  
VSC OFF indicator light circuit  
BRAKE warning light circuit  
SLIP indicator light circuit  
DI–236  
DI–240  
(b) In case of not using hand–held tester:  
Tc  
Check the DTC of ABS & BA & TRC & VSC ECU.  
(1) Using SST, connect terminals Tc and CG of DLC3.  
SST 09843–18040  
DLC3  
(2) Turn the ignition switch ON.  
(3) Read the DTC from the ABS warning light and VSC  
warning light on the combination meter.  
HINT:  
S
CG  
If no code appears, inspect the diagnostic circuit, ABS  
warning light circuit or VSC waning light circuit.  
F04969  
TroubleArea  
See page  
DI–250  
DI–231  
DI–233  
Tc terminal circuit  
ABS warning light circuit  
VSC warning light circuit  
AVENSIS/CORONA SUP (RM781E)  
DI–172  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
S
As an example, the blinking patterns for normal code and  
code 31 and 32 are shown on the left.  
(4) Codes are explained in the code table on page  
DI–176.  
Normal Code  
2 secs.  
0.25 secs.  
0.25 secs.  
(5) After completing the check, disconnect terminals Tc  
and E1, and turn OFF the display.  
ON  
If 2 or more malfunctions are indicated at the same time, the  
lowest numbered DTC will be displayed 1st.  
OFF  
Code 31 and 32  
0.5 secs.  
1.5 secs.  
2.5 secs.  
0.5 secs.  
4 secs.  
ON  
OFF  
Code 32  
Code 31  
F04712  
(c) In case of using hand–held tester :  
Check the DTC.  
Hand–held  
Tester  
(1) Hook up the hand–held tester to the DLC3.  
(2) Turn the ignition switch ON.  
(3) Read the DTC by following the prompts on the tes-  
ter screen.  
HINT:  
DLC3  
Please refer to the hand–held tester operator’s manual for fur-  
ther details.  
D01600  
(d) In case of not using hand–held tester:  
Clear the DTC.  
(1) Using SST, connect terminals Tc and E1 of check  
connector.  
SST 09843 – 18040  
(2) Turn the ignition switch ON.  
(3) Clear the DTC stored in ECU by depressing the  
brake pedal 8 or more times within 5 seconds.  
(4) Check that the warning light shows the normal  
code.  
BR3890  
(5) Remove the SST from the terminals of DLC 3.  
SST 09843 – 18040  
AVENSIS/CORONA SUP (RM781E)  
DI–173  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
(e) In case of using hand–held tester:  
Clear the DTC.  
Hand–held  
Tester  
(1) Hook up the hand–held tester to the DLC3.  
(2) Turn the ignition switch ON.  
(3) Operate the hand–held tester to erase the codes.  
(See hand–held tester operator’s manual.)  
DLC3  
D01600  
2.  
SPEED SENSOR SIGNAL CHECK (TEST MODE)  
Ts  
(a) In case of not using hand–held tester:  
Check the sensor signal.  
DLC3  
(1) Turn the ignition switch OFF.  
(2) Using SST, connect terminals Ts and CG of DLC3.  
SST 09843–18040  
(3) Start the engine.  
CG  
F04969  
(4) Check that the ABS warning light blinks.  
HINT:  
If the ABS warning light does not blink, inspect the ABS warning  
light circuit (See page DI–231).  
0.13 sec.  
0.13 sec.  
ON  
(5) Drive vehicle straight forward.  
Drive vehicle at a speed faster than 45 km/h (28 mph) for  
several seconds.  
OFF  
HINT:  
The sensor check may not be completed if the front wheels are  
spun or the steering wheel is steered during this check.  
(6) Stop the vehicle.  
BR3904  
(7) Using SST, connect terminals Tc and CG of DLC3.  
SST 09843–18040  
(8) Read the number of blinks of the ABS warning light.  
HINT:  
S
See the list of DTC shown on the next page.  
S
If every sensor is normal, a normal code is output (A cycle  
of 0.25 sec. ON and 0.25 sec. OFF is repeated).  
If 2 or more malfunction codes are identified at the same  
time, the lowest numbered code will be displayed 1st.  
S
Malfunction Code (Example Code 72, 76)  
7
2
7
6
ON  
OFF  
1.5 sec.  
0.5 sec.  
4 sec.  
2.5 sec.  
0.5 sec.  
0.5 sec.  
0.5 sec.  
Repeat  
BR3893  
AVENSIS/CORONA SUP (RM781E)  
DI–174  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
(9) After doing the check, disconnect the SST from ter-  
minals Ts and CG, Tc and CGof DLC3, and turn the  
ignition switch OFF.  
SST 09843–18040  
(b) In case of using hand–held tester:  
Hand–held  
Tester  
Check the sensor signal.  
(1) Hook up the hand–held tester to the DLC3.  
(2) Do step (3) – (6) on the previous page and this  
page.  
(3) Read the DTC by following the prompts on the tes-  
ter screen.  
DLC3  
HINT:  
Please refer to the hand–held tester operator’s manual for fur-  
ther details.  
D01600  
DTC of speed sensor check function:  
Code No.  
Diagnosis  
TroubleArea  
S Right front speed sensor  
C1271 / 71  
Low output voltage of right front speed sensor  
Low output voltage of left front speed sensor  
Low output voltage of right rear speed sensor  
Low output voltage of left rear speed sensor  
S Sensorinstallation  
S Right front speed sensor rotor  
S Left front speed sensor  
C1272 / 72  
C1273 / 73  
S Sensorinstallation  
S Left front speed sensor rotor  
S Right rear speed sensor  
S Sensorinstallation  
S Right rear speed sensor rotor  
S Left rear speed sensor  
C1274 / 74  
C1275 / 75  
S Sensorinstallation  
S Left rear speed sensor rotor  
Abnormal change in output signal of right front speed sen-  
sor  
Right front speed sensor rotor  
C1276 / 76  
C1277 / 77  
C1278 / 78  
Abnormal change in output signal of left front speed sensor Left front speed sensor rotor  
Abnormal change in output signal of right rear speed sensor Right rear speed sensor rotor  
Abnormal change in output signal of left rear speed sensor  
Left rear speed sensor rotor  
AVENSIS/CORONA SUP (RM781E)  
DI–175  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
3.  
STEERING ANGLE SENSOR ZERO POINT CALIBRA-  
TION  
NOTICE:  
When replacing the steering angle sensor with column as-  
sembly or ABS & BA & TRC & VSC ECU, Engine and ECT  
ECU (A/T), Engine ECU (M/T) or when adjusting the front  
wheel alignment or steering wheel center point in accor-  
dance with the removing and installing or replacing the  
suspension, axle or steering parts, make sure to perform  
steering angle sensor zero point calibration.  
(a) Using SST, connect terminals Ts and CG of DLC3.  
SST 09843–18040  
(b) Turn the ignition switch ON.  
(c) Make sure the steering off center angle is less than ±3°  
when assembling of steering wheels (Smaller value is de-  
sirable).  
(d) Press the VSC OFF switch and hold it.  
HINT:  
(e) Depress the brake pedal 3 times or more within 2 se-  
conds.  
(f)  
Check that the VSC buzzer sounds for 3 seconds.  
HINT:  
S
Press and hold the VSC OFF switch until VSC buzzer  
sounds.  
When it starts sounding, turn off the switch.  
When the VSC buzzer starts sounding, turn off the VSC  
OFF switch.  
If the VSC buzzer sounds, the sensor calibration is in nor-  
mal completion.  
If the VSC buzzer does not sound, do the sensor calibra-  
tion again.  
If the VSC buzzer still will not sound, there is malfunction  
in the steering angle sensor, so check the DTC.  
S
S
S
S
AVENSIS/CORONA SUP (RM781E)  
DI–176  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZE–01  
DIAGNOSTIC TROUBLE CODE CHART  
NOTICE:  
S
When removing the part, turn the ignition switch OFF.  
When replacing the steering angle sensor or ECU, make sure to perform steering angle sensor  
zero point calibration.  
S
HINT:  
S
S
S
Using SST 09843–18040, connect the terminals Tc and CG of the DLC 3.  
If any abnormality is not found when inspecting parts, inspect the ECU.  
If a malfunction code is displayed during the DTC check, check the circuit listed for the code. For details  
of each code, refer to the page under the ”See page” for respective ”DTC No.” in the DTC chart.  
DTC chart of ABS system:  
DTC No.  
DetectionItem  
TroubleArea  
(See Page)  
C0278 / 11  
S ABS solenoid relay  
Open or short circuit in ABS solenoid relay circuit  
Open or short circuit in ABS motor relay circuit  
Open or short circuit in brake actuator  
(DI–190)  
S ABS solenoid relay circuit  
C0273 / 13  
(DI–189)  
S ABS motor relay  
S ABS motor relay circuit  
C0226 / 21  
(DI–188)  
S Brakeactuator  
S SFRR or SFRH circuit  
C0236 / 22  
(DI–188)  
S Brakeactuator  
Open or short circuit in brake actuator  
S SFLR or SFLH circuit  
C0246 / 23  
(DI–188)  
S Brakeactuator  
Open or short circuit in brake actuator  
S SRRR or SRRH circuit  
C0256 / 24  
(DI–188)  
S Brakeactuator  
Open or short circuit in brake actuator  
S SRLR or SRLH circuit  
C0200 / 31  
(DI–182)  
Right front wheel speed sensor signal malfunction  
Left front wheel speed sensor signal malfunction  
Right rear wheel speed sensor signal malfunction  
Left rear wheel speed sensor signal malfunction  
Open circuit in right front speed sensor circuit  
Open circuit in left front speed sensor circuit  
Front tires are different from rear in size.  
Open circuit in right rear speed sensor circuit  
Open circuit in left rear speed sensor circuit  
C0205 / 32  
(DI–182)  
S Right front, left front, right rear and left rear speed sensor  
S Each speed sensor circuit  
C0210 / 33  
(DI–182)  
S Speed sensor rotor  
C0215 / 34  
(DI–182)  
C1330 / 35  
(DI–182)  
S Right front speed sensor  
S Right front speed sensor circuit  
C1331 / 36  
(DI–182)  
S Left front speed sensor  
S Left front speed sensor circuit  
C1237 / 37  
(DI–206)  
S Tire size  
S Speed sensor rotor  
C1332 / 38  
(DI–182)  
S Right rear speed sensor  
S Right rear speed sensor circuit  
C1333 / 39  
(DI–182)  
S Left rear speed sensor  
S Left rear speed sensor circuit  
S Battery  
C1241 / 41  
(DI–208)  
Low battery positive voltage or abnormally high battery positive  
voltage  
S Chargingsystem  
S Power source circuit  
C1249 / 58  
(DI–215)  
S Stop light switch  
Open circuit in stop light switch circuit  
S Stop light switch circuit  
AVENSIS/CORONA SUP (RM781E)  
DI–177  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
ABS & BA & TRC & VSC ECU  
C1300 / 62  
(DI–220)  
Malfunction in ABS & BA & TRC & VSC ECU  
Always ON  
(DI–225)  
Malfunction in ABS & BA & TRC & VSC ECU  
Open circuit in ABS warning light circuit  
S Chargingsystem  
S ABS warning light circuit  
DTC chart of VSC system:  
DTC No.  
DetectionItem  
(See Page)  
TroubleArea  
C1225 / 25  
(DI–188)  
Open or short circuit in brake actuator solenoid circuit (SMC1  
circuit)  
S Brakeactuator  
S SMC1 circuit  
C1226 / 26  
(DI–188)  
Open or short circuit in brake actuator solenoid circuit (SMC2  
circuit)  
S Brakeactuator  
S SMC2 circuit  
C1227 / 27  
(DI–188)  
Open or short circuit in brake actuator solenoid circuit (SRC1  
circuit)  
S Brakeactuator  
S SRC1 circuit  
C1228 / 28  
(DI–188)  
Open or short circuit in brake actuator solenoid circuit (SRC2  
circuit)  
S Brakeactuator  
S SRC2 circuit  
S Steering angle sensor circuit  
S Yaw rate sensor circuit  
C1301 / 42  
(DI–222)  
Malfunction in CAN communication (steering angle circuit, yaw  
rate sensor circuit)  
S ABS & BA & TRC & VSC ECU  
C0365 / 43  
(DI–191)  
Malfunction in deceleration sensor (combined in yaw rate sen-  
sor)  
S Decelerationsensor  
S Deceleration sensor circuit  
S NEO circuit  
C1202 / 44  
(DI–197)  
Open or short circuit in NE signal circuit  
S Engine and ECT ECU (A/T) or Engine ECU (M/T)  
S ABS & BA & TRC & VSC ECU  
C1350 / 51  
(DI–221)  
Pump motor is locked  
S Brake actuator pump motor  
Open circuit in pump motor ground  
S Brake actuator pump motor circuit  
C1246 / 53  
(DI–212)  
S Master cylinder pressure sensor  
Malfunction in master cylinder pressure sensor  
Malfunction in steering angle sensor  
S Master cylinder pressure sensor circuit  
C1208 / 54  
(DI–202)  
S Steering angle sensor  
S Steering angle sensor circuit  
C0371 / 55  
(DI–194)  
S Yaw rate sensor  
Malfunction in yaw rate sensor circuit  
S Yaw rate sensor circuit  
Always ON  
(DI–228)  
Malfunction in ABS & BA & TRC & VSC ECU  
Open circuit in VSC warning light circuit  
S Chargingsystem  
S VSC warning light circuit  
Malfunction in ENGINE and ECT ECU (A/T) or ENGINE ECU  
(M/T) and ABS & BA & TRC & VSC ECU circuit  
S ENGINE and ECT ECU (A/T) or ENGINE ECU (M/T)  
C1203 / 59  
(DI–200)  
S ABS & BA & TRC & VSC ECU  
S Serialcommunicationcircuit  
C1288 / 88  
(DI–219)  
Malfunction in ENGINE and ECT ECU (A/T) or ENGINE ECU  
(M/T) version  
S ABS & BA & TRC & VSC ECU  
S Steering angle sensor zero point calibration  
AVENSIS/CORONA SUP (RM781E)  
DI–178  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZF–01  
PARTS LOCATION  
Combination Meter  
DABS Warning Light  
DVSC Warning Light  
DBRAKE Warning Light  
DVSC OFF Indicator Light  
DSLIP Indicator Light  
RearSpeedSenser  
Yaw Rate Sensor  
(Including Deceleration Sensor)  
Steering Angle Sensor  
Front SpeedSensor  
DLC3  
Rear Speed Senser  
Rotor  
Front SpeedSensor  
Rotor  
ABS & BA & TRC & VSC ECU with Actuator  
DMaster Cylinder Pressure Sensor  
DRelay  
F12739  
AVENSIS/CORONA SUP (RM781E)  
DI–179  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZG–01  
TERMINALS OF ECU  
ABS & BA & TRC & VSC ECU:  
A29  
F12741  
Symbols (TerminalsNo.)  
WiringColor  
Condition  
STD Voltage (V)  
IG switch ON, VSC OFF indicator light ON  
IG switch ON, VSC OFF indicator light OFF  
IG switch ON, SLIP indicator light ON  
IG switch ON, SLIP indicator light OFF  
Below 2.0  
10 – 14  
WT (A29 – 2) – GND (A29 – 6, 10)  
O ↔ W–B  
Below 2.0  
10 – 14  
IND (A29 – 4) – GND (A29 – 6, 10)  
͌ ↔ W–B  
+BS (A29 – 5) – GND (A29 – 6, 10)  
ENG+ (A29 – 8) – ENG– (A29 – 7)  
+BM (A29 – 9) – GND (A29 – 6, 10)  
PMC (A29 – 11) – GND (A29 – 6, 10)  
E2 (A29 – 12) – GND (A29 – 6, 10)  
SS1 (A29 – 13) – GND (A29 – 6, 10)  
IG1 (A29 – 14) – GND (A29 – 6, 10)  
B ↔ W–B  
R ↔ L  
10 – 14  
Engineidling  
Pulsegeneration  
10 – 14  
B ↔ W–B  
LG ↔ W–B  
BR ↔ W–B  
W ↔ W–B  
B–R ↔ W–B  
IG switch ON, brake pedal released  
IG switch OFF  
0.3 – 0.8  
continuity  
IG switch ON  
Pulsegeneration  
10–14  
IG switch ON  
IG switch ON, VSC buzzer sounds  
IG switch ON, VSC buzzer does not sound  
Engine idling, slowly turn steering wheel  
IG switch ON  
Below1.0 ↔ 10–14  
10–14  
BZ (A29 – 15) – GND (A29 – 6, 10)  
G ↔ W–B  
YGND (A29 – 16) – YIGA (A29 – 30)  
TC (A29 – 17) – GND (A29 – 6, 10)  
TRC+ (A29 – 18) – TRC– (A29 – 19)  
BR–W ↔ LG–R  
LG–R ↔ W–B  
Y ↔ B  
Pulsegeneration  
10 – 14  
Engineidling  
Pulsegeneration  
Below 1.5  
IG switch ON, BRAKE warning light ON  
IG switch ON, BRAKE warning light OFF  
EBDW (A29 – 20) – GND (A29 – 6, 10)  
FR+ (A29 – 21) – FR– (A29 – 22)  
R–W ↔ W–B  
10 – 14  
1
W–R * ↔ B  
IG switch ON, slowly turn right front wheel  
ACgeneration  
2
W * ↔ B  
RL+ (A29 – 23) – RL– (A29 – 40)  
D/G (A29 – 26) – GND (A29 – 6, 10)  
VCM (A29 – 27) – GND (A29 – 6, 10)  
TS (A29 – 28) – GND (A29 – 6, 10)  
SS2 (A29 – 29) – GND (A29 – 6, 10)  
Y ↔ BR  
LG–R ↔ W–B  
L–Y ↔ W–B  
R–B ↔ W–B  
B ↔ W–B  
IG switch ON, slowly turn left rear wheel  
IG switch ON  
ACgeneration  
10 – 14  
IG switch ON  
4.5 – 5.5  
IG switch ON  
10 – 14  
IG switch ON  
Pulsegeneration  
Below 2.0  
10 – 14  
IG switch ON, parking brake switch ON  
IG switch ON, parking brake switch OFF  
Engineidling  
PKB (A29 – 31) – GND (A29 – 6, 10)  
NEO (A29 – 32) – GND (A29 – 6, 10)  
VSCW (A29 – 34) – GND (A29 – 6, 10)  
R–W ↔ W–B  
P ↔ W–B  
Pulsegeneration  
Below 2.0  
10 – 14  
IG switch ON, VSC warning light ON  
IG switch ON, VSC warning light OFF  
R ↔ W–B  
*1: LHD  
*2: RHD  
AVENSIS/CORONA SUP (RM781E)  
DI–180  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
IG switch ON, ABS warning light ON  
10 – 14  
Below 2.0  
WA (A29 – 35) – GND (A29 – 6, 10)  
P–L ↔ W–B  
L ↔ W–B  
IG switch ON, ABS warning light OFF  
Vehicle driving at about 20 km/h (12 mph)  
Stop light switch ON (Brake pedal pushed)  
Stop light switch OFF (Brake pedal released)  
3
SP1 (A29 – 36)* – GND (A29 – 6, 10)  
Pulsegeneration  
8 – 14  
STP (A29 – 37) – GND (A29 – 6, 10)  
G–W ↔ W–B  
Below 1.5  
1
P ↔ L–R*  
RR+ (A29 – 38) – RR– (A29 – 39)  
FL+ (A29 – 41) – FL– (A29 – 24)  
CSW (A29 – 42) – GND (A29 – 6, 10)  
IG switch ON, slowly turn right rear wheel  
ACgeneration  
2
P ↔ L*  
R ↔ L–W  
IG switch ON, slowly turn left front wheel  
IG switch ON, VSC OFF switch pushed in  
IG switch ON, VSC OFF switch released  
ACgeneration  
Below 1.5  
8–14  
1
G–W* ↔ W–B  
2
G–R* ↔ W–B  
*1: LHD  
*2: RHD  
*3: A/T vehicle only  
AVENSIS/CORONA SUP (RM781E)  
DI–181  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZH–01  
PROBLEM SYMPTOMS TABLE  
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each  
problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.  
NOTICE:  
When replacing ABS & BA & TRC & VSC ECU, sensor, etc., turn the IG switch OFF.  
Symptom  
Suspect Area  
See page  
Only when 1. – 4. are all normal and the problem is still  
occurring, replace the ABS & BA & TRC & VSC ECU.  
1. Check the DTC, reconfirming that the normal code is  
output.  
DI–171  
ABS does not operate  
2. IG power source circuit  
DI–208  
DI–182  
DI–182  
3. Speed sensor circuit  
4. Check the brake actuator with a hand–held tester.  
If abnormal, check the hydraulic circuit for leakage.  
Only when 1. – 4. are all normal and the problem is still  
occurring, replace the ABS & BA & TRC & VSC ECU.  
1. Check the DTC, reconfirming that the normal code is  
output.  
DI–171  
ABS does not operate efficiently  
2. Speed sensor circuit  
DI–182  
DI–215  
DI–215  
3. Stop light switch circuit  
4. Check the brake actuator with a hand–held tester.  
If abnormal, check the hydraulic circuit for leakage.  
1. ABS warning light circuit  
DI–231  
ABS warning light abnormal  
2. ABS & BA & TRC & VSC ECU  
Only when 1. – 3. are all normal and the problem is still  
occurring, replace the ABS & BA & TRC & VSC ECU.  
1. ABS warning light circuit  
DTC check cannot be done  
DI–231  
DI–233  
DI–250  
2. VSC warning light circuit  
3. Tc terminal circuit  
1. Ts terminal circuit  
DI–252  
Speed sensor signal check cannot be done  
2. ABS & BA & TRC & VSC ECU  
Only when circuits inspected for each problem symptom  
are all normal and the problem is still occurring, replace the  
ABS & BA & TRC & VSC ECU.  
1. Check the DTC, reconfirming that the normal code is  
output.  
DI–171  
VSC does not operate  
2. IG power source circuit  
DI–208  
DI–254  
DI–182  
3. Hydraulic circuit for leakage  
4. Speed sensor circuit  
BA does not operate  
Stop light switch circuit  
DI–215  
DI–240  
DI–236  
SLIP indicator light abnormal  
SLIP indicator light circuit  
1. BRAKE warning light circuit  
BRAKE warning light abnormal  
VSC OFF indicator light abnormal  
2. ABS & BA & TRC & VSC ECU  
Only when circuits inspected for each problem symptom  
are all normal and the problem is still occurring, replace the  
ABS & BA & TRC & VSC ECU.  
1. VSC OFF indicator light circuit  
DI–243  
DI–243  
2. VSC OFF switch circuit  
AVENSIS/CORONA SUP (RM781E)  
DI–182  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZI–01  
CIRCUIT INSPECTION  
DTC C0200 / 31 – C1331 / 36 Speed Sensor Circuit  
DTC C1332 / 38, C1333 / 39 Speed Sensor Circuit  
CIRCUIT DESCRIPTION  
The speed sensor detects a wheel speed and sends the ap-  
propriate signals to the ECU. These signals are used to control  
of the ABS and VSC system. Each of the front and rear rotors  
has 48 serrations.  
When the rotors rotate, a magnetic field emitted by a permanent  
magnet in the speed sensor generates an AC voltage. Since  
the frequency of this AC voltage changes in direct proportion to  
the speed of the rotor, the frequency is used by the ECU to de-  
tect the speed of each wheel.  
Speed Sensor  
S
N
Magnet  
Rotor  
Coil  
To ECU  
Low Speed  
High Speed  
+V  
–V  
BR3583  
BR3582  
F00010  
DTC No.  
DTCDetectingCondition  
TroubleArea  
When any of the following 1. to 3. is detected :  
1. Vehicle speed is more than 40 km/h (25 mph), pulses  
are not input for 0.01 sec.  
C0200 / 31  
C0205 / 32  
C0210 / 33  
C0215 / 34  
S Right front, left front, right rear, left rear speed sensor  
S Each speed sensor circuit  
S Sensorinstallation  
2. After the initial start or restart and when the vehicle  
speed has reached 12 km/h (7 mph), the wheel speed of  
0 km/h (0 mph) is detected.  
S Tire size  
3. After the initial start or restart and when the vehicle  
speed has reached 18 km/h (11 mph), the front wheel  
speed of 0 km/h (0 mph) is detected.  
C1330 / 35  
C1331 / 36  
C1332 / 38  
C1333 / 39  
Detecting abnormality in the resistance value of each speed S Right front, left front, right rear, left rear speed sensor  
sensor.  
S Each speed sensor circuit  
HINT:  
S
S
S
S
DTC No. C0200 / 31 and C1330 / 35 are for the right front speed sensor.  
DTC No. C0205 / 32 and C1331 / 36 are for the left front speed sensor.  
DTC No. C0210 / 33 and C1332 / 38 are for the right rear speed sensor.  
DTC No. C0215 / 34 and C1333 / 39 are for the left rear speed sensor.  
AVENSIS/CORONA SUP (RM781E)  
DI–183  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
WIRING DIAGRAM  
ABS & BA & TRC  
& VSC ECU  
41  
R
A29  
FL+  
FL–  
1
A7  
Left Front  
Speed Sensor  
2
24  
L–W  
A29  
(Shielded)  
(RHD)  
W–R (LHD)  
W (RHD)  
21  
1
IH2  
W
A29 FR+  
1
2
A8  
Right Front  
Speed Sensor  
R (LHD)  
B (RHD)  
22  
2
IH2  
B
A29  
FR–  
J1 (LHD)  
J20 (RHD)  
Junction  
(Shielded)  
(RHD)  
3
IH2  
Connector  
W–B  
A
(Shielded)  
(LHD)  
(Shielded)  
(LHD)  
11  
ID1  
9
9
23  
A29 RL+  
Y
Y
IC1 ID1  
A26  
Left  
Rear  
Speed  
Sensor  
1
2
(RHD)(LHD)  
40  
A29  
10  
10  
BR  
IC1 ID1  
(RHD)(LHD)  
RL–  
BR (LHD)  
B (RHD)  
7
(Shielded) (RHD)  
P
II1  
38  
7
8
P
A27  
Right  
Rear  
A29  
II1 II1  
RR+  
RR–  
1
(RHD)(LHD)  
Speed  
Sensor  
L–R (LHD)  
L (RHD)  
39  
8
9
2
A29  
II1 II1  
(RHD)(LHD)  
V (LHD)  
L (RHD)  
II  
(Shielded)  
(RHD)  
F13392  
AVENSIS/CORONA SUP (RM781E)  
DI–184  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
1
Check speed sensor.  
Front:  
PREPARATION:  
(a) Remove the front fender liner.  
1
(b) Disconnect the speed sensor connector.  
CHECK:  
2
Measure the resistance between terminals 1 and 2 of speed  
sensor connector.  
OK:  
Resistance: 0.6 – 2.5 kΩ (1.6 ± 0.2 kΩ at 20 °C)  
R14205  
CHECK:  
Measure the resistance between terminals 1 and 2 of speed  
sensor connector and body ground.  
OK:  
Resistance: 1 MΩ or higher  
Rear:  
PREPARATION:  
1
(a) Remove the seat cushion and seatback.  
(b) Disconnect the speed sensor connector.  
CHECK:  
2
Measure the resistance between terminals 1 and 2 of speed  
sensor connector.  
OK:  
Resistance: 1.2 – 2.3 kΩ (1.6 ± 0.1 kΩ at 20 °C)  
R14213  
CHECK:  
Measure the resistance between terminals 1 and 2 of speed  
sensor connector and body ground.  
OK:  
Resistance: 1 MΩ or higher  
NG  
Replace speed sensor.  
NOTICE:  
Check the speed sensor signal last (See page DI–171).  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–185  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
2
Check for open and short circuit in harness and connector between each speed  
sensor and ABS & BA & TRC & VSC ECU (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
3
Check speed sensor installation.  
CHECK:  
Check the speed sensor installation.  
OK:  
The installation bolt shall be tightened properly and  
no clearance is allowed between the sensor and front  
steering knuckle or rear axle carrier.  
OK  
NG  
BR3795  
NG  
Replace speed sensor.  
NOTICE:  
Check the speed sensor signal last (See page DI–171).  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–186  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
4
Check speed sensor and sensor rotor serrations.  
REFERENCE: INSPECTION USING OSCILLOSCOPE  
PREPARATION:  
Normal Signal Waveform  
(a) Disconnect the connector from the ABS & BA & TRC &  
VSC ECU.  
(b) Connect the oscilloscope to the terminals FR+, FL+, RR+  
or RL+ and GND of the ECU harness side connector.  
CHECK:  
GND  
Drive the vehicle at about 30 km/h (19 mph), and check the sig-  
nal waveform.  
2 m/s / Division  
1 V / Division  
W04200  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
NG  
5
Check sensor rotor and sensor tip.  
Front:  
PREPARATION:  
Remove the front drive shaft (See page SA–3).  
CHECK:  
Check the sensor rotor serrations.  
OK:  
No scratches, missing teeth or foreign objects.  
PREPARATION:  
Remove the front speed sensor (See Pub. No. RM599E on  
R00948  
page BR–41).  
CHECK:  
Check the sensor tip.  
OK:  
No scratches or foreign objects on the sensor tip.  
AVENSIS/CORONA SUP (RM781E)  
DI–187  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
Rear:  
PREPARATION:  
Remove the axle hub ( See Pub. No. RM599E on page SA–10).  
CHECK:  
Check the sensor rotor serrations.  
OK:  
No scratches, missing teeth or foreign objects.  
PREPARATION:  
Remove the rear speed sensor (See Pub. No. RM599E on  
R00947  
page BR–44).  
CHECK:  
Check the sensor tip.  
OK:  
No scratches or foreign objects on the sensor tip.  
NG  
Replace sensor rotor or speed sensor.  
NOTICE:  
Check the speed sensor signal last (See page DI–171).  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–188  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZJ–01  
DTC C0226 / 21 – C1228 / 28 Brake Actuator Solenoid Circuit  
CIRCUIT DESCRIPTION  
This solenoid goes on when signals are received from the ECU and controls the pressure acting on the wheel  
cylinders thus controlling the braking force.  
DTC No.  
DTCDetectingCondition  
TroubleArea  
1. Solenoid signal does not match the check result.  
2. Solenoid open & short.  
S Brakeactuator  
C0226 / 21  
S SFRR or SFRH circuit  
S Brakeactuator  
C0236 / 22  
C0246 / 23  
C0256 / 24  
C1225 / 25  
C1226 / 26  
C1227 / 27  
C1228 / 28  
S SFLR or SFLH circuit  
S Brakeactuator  
S SRRR or SRRH circuit  
S Brakeactuator  
S SRLR or SRLH circuit  
S Brakeactuator  
Solenoid signal does not match the check result.  
S SMC 1 circuit  
S Brakeactuator  
S SMC 2 circuit  
S Brakeactuator  
S SRC 1 circuit  
S Brakeactuator  
S SRC 2 circuit  
INSPECTION PROCEDURE  
1
Check the DTC once more.  
PREPARATION:  
(a) Clear the DTC (See page DI–171).  
(b) Turn the ignition switch OFF.  
CHECK:  
Turn the ignition switch ON, and check if the same DTC is stored in the memory.  
NO No problem.  
YES  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–189  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZK–01  
DTC  
C0273 / 13  
ABS Motor Relay Circuit  
CIRCUIT DESCRIPTION  
The ABS motor relay supplies power to the ABS pump motor. When the ABS is activated, the ECU switches  
the ABS motor relay ON and operates the ABS pump motor.  
DTC No.  
DTCDetectingCondition  
TroubleArea  
When any of the following 1. through 2. is detected:  
1. Pump motor voltage is high, and the motor relay will not  
actuate .  
S ABS motor relay  
C0273/13  
2. Pump motor voltage remains low for longer 0.4 sec. or  
more and the pump repeats activating for 0.7 sec. 3  
timesmaximally. After the last activation, the pump mo-  
tor is deactivated gone dead because of short circuit.  
S ABS motor relay circuit  
INSPECTION PROCEDURE  
1
Check the DTC once more.  
PREPARATION:  
(a) Clear the DTC (See page DI–171).  
(b) Turn the ignition switch OFF.  
(c) Turn the ignition switch ON.  
CHECK:  
Vehicle speed is more than 6 km/h (4 mph), and check if the same DTC is stored in the memory.  
NO No problem.  
YES  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–190  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZL–01  
DTC  
C0278 / 11  
ABS Solenoid Relay Circuit  
CIRCUIT DESCRIPTION  
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is  
OK, the relay goes on.  
DTC No.  
DTCDetectingCondition  
TroubleArea  
Detection of any conditions from 1. through 2.:  
1. 3 or more solenoids are show faulty in response and  
simultaneously solenoid supply voltage is detected  
faulty.  
S ABS solenoid relay  
C0278 / 11  
S ABS solenoid relay circuit  
2. Solenoid relay will not be switched OFF.  
INSPECTION PROCEDURE  
1
Check the DTC once more.  
PREPARATION:  
(a) Clear the DTC (See page DI–171).  
(b) Turn the ignition switch OFF.  
CHECK:  
Turn the ignition switch ON, and check if the same DTC is stored in the memory.  
NO No problem.  
YES  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–191  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZM–01  
DTC  
C0365 / 43  
Deceleration Sensor Circuit  
CIRCUIT DESCRIPTION  
Deceleration sensor is combined with yaw rate sensor.  
DTC No.  
DTCDetectingCondition  
TroubleArea  
Detection of any of conditions from 1. through 2.:  
1. Decelerationdifference between sensor signal and refer- S Decelerationsensor  
C0365 / 43  
ence value is large.  
S Deceleration sensor circuit  
2. Offset value of sensor signal is higher than the standard S ABS & BA & TRC & VSC ECU  
value.  
AVENSIS/CORONA SUP (RM781E)  
DI–192  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
WIRING DIAGRAM  
ABS & BA & TRC  
& VSC ECU  
Deceleration Sensor  
4
30  
LG–R  
Y1  
UBAT  
A29 YIGA  
2
16  
A29  
BR–W  
GND  
YGND  
SS1  
Y1  
(Shielded)  
(LHD)  
(Shielded)  
W
3
13  
W
CANH  
CANL  
A29  
Y1  
29  
1
B
B
SS2  
A29  
Y1  
(Shielded)  
(LHD)  
W–B  
9
Center J/B  
Center J/B  
4
9
13  
3A  
W–B  
3F  
3F  
3E  
W–B  
Instrument Panel J/B  
11  
IH  
4
IE  
W–B  
1
*
1
* : IH (LHD)  
IK (RHD)  
F13393  
AVENSIS/CORONA SUP (RM781E)  
DI–193  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1 in case of using the hand–held tester and start from step 2 in case of not  
using the hand–held tester.  
1
Check output value of the deceleration sensor.  
PREPARATION:  
(a) Remove the 2 bolts and deceleration sensor with connec-  
tor still connected.  
(b) Connect the hand–held tester to the DLC3  
(c) Turn the ignition switch ON and push the hand–held tes-  
ter main switch ON.  
(d) Select the DATALIST mode on the hand–held tester.  
(e) Check the deceleration value 0 ± 0.23 G.  
CHECK:  
F13408  
Check that the yaw rate value of the deceleration sensor dis-  
played on the hand–held tester is changing: Place the yaw rate  
sensor vertically to the ground and turn the sensor pivoted on  
its center.  
OK:  
Deceleration value must be changing.  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
2
Check for open and short circuit in harness and connector between deceleration  
sensor and ABS & BA & TRC & VSC ECU (See page IN–30).  
NG  
Repair or replace harness and connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–194  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZN–01  
DTC  
C0371 / 55  
Yaw Rate Sensor Circuit  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
Detection of any of conditions from 1. through 4.:  
1. The voltage of sensor signal is out of range.  
2. The offset value of sensor signal is outside the plausible S Yaw rate sensor  
C0371 / 55  
range.  
S Yaw rate sensor circuit  
3. Sensor signal change rapidly under normal driving.  
4. Sensor is more or worse sensitivity than reference yaw  
rateduringcornering.  
S ABS & BA & TRC & VSC ECU  
AVENSIS/CORONA SUP (RM781E)  
DI–195  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
WIRING DIAGRAM  
ABS & BA & TRC  
& VSC ECU  
Yaw Rate Sensor  
4
30  
LG–R  
Y1  
UBAT  
GND  
A29 YIGA  
2
16  
A29  
BR–W  
YGND  
SS1  
Y1  
(Shielded)  
(LHD)  
(Shielded)  
W
3
13  
W
CANH  
CANL  
A29  
Y1  
29  
1
B
B
SS2  
A29  
Y1  
(Shielded)  
(LHD)  
W–B  
9
Center J/B  
Center J/B  
4
9
13  
3A  
W–B  
3F  
3F  
3E  
W–B  
Instrument Panel J/B  
11  
IH  
4
IE  
W–B  
1
1
*
* : IH (LHD)  
IK (RHD)  
F13393  
AVENSIS/CORONA SUP (RM781E)  
DI–196  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1 in case of using the hand–held tester and start from step 2 in case of not  
using the hand–held tester.  
1
Check output value of the yaw rate sensor.  
PREPARATION:  
(a) Remove the 2 bolts and yaw rate sensor with connector  
still connected.  
(b) Connect the hand–held tester to the DLC3.  
(c) Turn the ignition switch ON and push the hand–held tes-  
ter main switch ON.  
(d) Select the DATALIST mode on the hand–held tester.  
(e) Check the yaw rate value 0 ± 5 deg/s.  
CHECK:  
F12654  
Check that the yaw rate value of the yaw rate sensor displayed  
on the hand–held tester is changing: Place the yaw rate sensor  
vertically to the ground and turn the sensor pivoted on its center.  
OK:  
Yaw rate value must be changing.  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
2
Check for open and short circuit in harness and connector between yaw rate  
sensor and ABS & BA & TRC & VSC ECU (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–197  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZO–01  
DTC  
C1202 / 44  
NE Signal Circuit  
CIRCUIT DESCRIPTION  
The ABS & BA & TRC & VSC ECU receives engine revolution speed signals (NE signals) from the Engine  
and ECT ECU (A/T) or Engine ECU (M/T).  
DTC No.  
DTCDetectingCondition  
TroubleArea  
At vehicle speed of 30 km/h (19 mph) or more, and when  
data received from the Engine and ECT ECU (A/T) or En-  
gine ECU (M/T) is in normal condition, and open or short  
circuit for engine revolution signal circuit continues for 5  
secs. or more.  
S NEO circuit  
C1202 / 44  
S Engine and ECT ECU (A/T) or Engine ECU (M/T)  
S ABS & TRC & VSC ECU  
WIRING DIAGRAM  
Engine ECU (M/T)  
Engine and ECT ECU (A/T)  
ABS & BA &TRC &  
VSC ECU  
15  
32  
P
NEO  
A29  
NEO  
E13  
F03929  
AVENSIS/CORONA SUP (RM781E)  
DI–198  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
1
Check for open and short circuit in harness and connector between terminal  
NEO of ABS & BA & TRC & VSC ECU and terminal NEO of Engine and ECT ECU  
(A/T) or Engine ECU (M/T) (See page IN–30).  
NG  
Repair or replace harness and connector.  
OK  
2
Check voltage between terminal NEO of ABS & BA & TRC & VSC ECU and body  
ground.  
PREPARATION:  
(a) Remove ABS & BA & TRC & VSC ECU with connectors  
NEO  
ON  
still connected.  
(b) Turn ignition switch ON.  
CHECK:  
Measure voltage between terminal NEO of ABS & BA & TRC  
& VSC ECU and body ground for the engine conditions below.  
OK:  
(+)  
(–)  
F13390  
Enginecondition  
OFF (IG ON)  
ON (Idling)  
Voltage  
3 – 6 V or below 1 V  
3 – 6 V ↔ below 1 V (Pulse)  
(Reference)  
3 – 6 V  
Below 1 V  
F03007  
AVENSIS/CORONA SUP (RM781E)  
DI–199  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
NG  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly or Engine and ECT ECU  
(A/T) or Engine ECU (M/T).  
OK  
If the same codes is still output after the DTC is deleted, check the contact condition of each con-  
nection.  
AVENSIS/CORONA SUP (RM781E)  
DI–200  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZP–01  
DTC  
C1203 / 59  
EFI Communication Circuit  
Malfunction  
CIRCUIT DESCRIPTION  
The circuit is used to send TRAC & VSC control information from the ABS & BA & TRC & VSC ECU to the  
Engine and ECT ECU (A/T) or Engine ECU (M/T) (TRC+, TRC–), and engine control information from the  
Engine and ECT ECU (A/T) or Engine ECU (M/T) to the ABS & BA & TRC & VSC ECU (ENG+, ENG–).  
DTC No.  
DTCDetectingCondition  
TroubleArea  
When any of the following 1. through 3. is detected :  
1. IG1 voltage is 8.5 V or more, and the condition that data  
can not be sent to Engine ECU (M/T) or Engine and  
ECT ECU (A/T) continues for 1.2 sec. or more.  
2. IG1 voltage is 8.5 V or more, engine speed is 500 r.p.m  
or more, vehicle speed is 60 km/h (38 mph) or more,  
and the condition that data can not be received from  
Engine ECU (M/T) or Engine and ECT ECU (A/T) con-  
tinues for 5 sec. or more.  
S TRC+ or TRC– circuit  
S ENG+ or ENG– circuit  
53  
S Engine ECU (M/T) or Engine and ECT ECU (A/T)  
S ABS & BA & TRC & VSC ECU  
3. The condition that data can not be transmitted between  
the ABS & BA & TRC & VSC ECU and Engine ECU  
(M/T) or Engine and ECT ECU (A/T) occurs at least  
once within 5 sec. continues 10 consecutive times.  
WIRING DIAGRAM  
Engine ECU (M/T)  
Engine and ECT ECU (A/T)  
ABS & BA & TRC &  
VSC ECU  
12  
E15  
21  
IE2 IF2  
(RHD) (LHD)  
19  
A29  
21  
B
B
TRC–  
TRC+  
TRC–  
TRC+  
18  
A29  
17  
E15  
22 22  
IE2 IF2  
Y
Y
(RHD) (LHD)  
7
A29  
21  
L
ENG– E14  
ENG–  
ENG+  
8
A29  
22  
E14  
R
ENG+  
F13407  
AVENSIS/CORONA SUP (RM781E)  
DI–201  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
1
Check for open and short circuit in harness and connector between each of ter-  
minals ENG+, ENG–, TRC+ and TRC– of ABS & BA & TRC & VSC ECU and Engine  
ECU (M/T) or Engine and ECT ECU (A/T) (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
2
Check operation of the malfunction indicator.  
NG  
Check and replace Engine and ECT ECU (A/T) or  
Engine ECU (M/T).  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–202  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZQ–01  
DTC  
C1208 / 54  
Steering Angle Sensor Circuit  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
Detection of any of conditions 1. through 7:  
1. When the condition that ECU terminal IG1 voltage is 9.8  
V or more, and does not receive data from steering  
angle sensor continues.  
2. Sensorinternalfailure.  
S Steering angle sensor  
3. The offset value is out of range.  
C1208 / 54  
S Steering angle sensor circuit  
4. Sensor signal change higher.  
5. Steering angle value difference between measured and  
reference is out of range.  
6. Steering sensor is not centered.  
7. Steering sensor signal is out of range.  
8. Steering sensor is not calibration.  
AVENSIS/CORONA SUP (RM781E)  
DI–203  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
WIRING DIAGRAM  
S23  
ABS & BA & TRC  
& VSC ECU  
Steering Sensor  
6
30  
LG–R  
12V  
A29  
YIGA  
YGND  
SS1  
S23  
5
16  
BR–W  
GND  
S23  
A29  
(Shielded)  
W
7
13  
CAN  
HIGH  
A29  
S23  
29  
1
B
CAN  
LOW  
SS2  
S23  
A29  
(Shielded)  
(RHD)  
W–B  
9
Center J/B  
Center J/B  
4
9
13  
3A  
W–B  
3F  
3F  
3E  
W–B  
Instrument Panel J/B  
11  
IH  
4
IE  
W–B  
1
*
1
* : IH (LHD)  
IK (RHD)  
F13394  
AVENSIS/CORONA SUP (RM781E)  
DI–204  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1 in case of using the hand–held tester and start from step 2 in case of not  
using the hand–held tester.  
1
Check output value of the steering angle sensor.  
PREPARATION:  
(a) Connect the hand–held tester to the DLC3.  
(b) Turn the ignition switch ON and push the hand–held tester main switch ON.  
(c) Select the DATALIST mode on the hand–held tester.  
CHECK:  
Check that the steering wheel turning angle value of the steering angle sensor displayed on the hand–held  
tester is appropriate when turning the steering wheel.  
OK:  
Steering wheel turning angle value must be appropriate.  
OK  
Go to step 4.  
NG  
2
Check the installation condition of steering angle sensor.  
NG  
Repair or replace steering angle sensor with  
column Assembly (See page SR–6).  
OK  
3
Check for open and short circuit in harness and connector between steering  
angle sensor and ABS & BA & TRC & VSC ECU (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–205  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
4
Calibrate the steering angle sensor (See page DI–171).  
NG  
Replace steering angle sensor with colum As-  
sembly (See page SR–6).  
OK  
5
Replace the ECU and check whether or not the trouble occurs again.  
YES  
Replace steering angle sensor with colum As-  
sembly (See page SR–6).  
NO  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–206  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZR–01  
DTC  
C1237 / 37  
Wrong Number of Teeth at 1 of 4 Wheels  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
Detection of any of conditions from 1. through 4.:  
1. When the ignition switch is ON, the speed difference  
between the rear right and rear left wheels is 5 km/h  
(3mph) or more (vehicle speed: 100 km/h (62 mph) or  
less).  
S Tire size  
2. When the ignition switch is ON, the slip difference be-  
tween the reference wheel and any other wheels is 6%  
or more (vehicle speed: 100 km/h (62 mph) or more).  
3. Continuous ABS control for 60 sec. or more.  
4. Interference on 1 or more wheels for 20 sec. with the  
brake pedal depressed, or for 5 sec. when the brake  
pedal is not depressed.  
C1237 / 37  
S Speed sensor rotor  
INSPECTION PROCEDURE  
1
Check tire size.  
NG  
Replace tires so that all 4 tires are the same in  
size.  
OK  
2
Check sensor rotor (See page DI–182).  
NG  
Replace speed sensor rotor.  
OK  
3
Check speed sensor (See page DI–182).  
NG  
Replace speed sensor.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–207  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
4
Check for open and short circuit in harness and connector between front speed  
sensor, rear speed sensor and ABS & BA & TRC & VSC ECU (See page  
IN–30).  
NG  
Repair or replace harness and connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator.  
AVENSIS/CORONA SUP (RM781E)  
DI–208  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZS–01  
DTC  
C1241 / 41  
IG Power Source Circuit  
CIRCUIT DESCRIPTION  
This is the power source for the ECU, hence the brake actuators.  
DTC No.  
DTCDetectingCondition  
TroubleArea  
At a vehicle speed of 6 km/h (4 mph) or more, the condition S Battery  
C1241 / 41  
that low battery voltage is 10 V or less and high battery  
voltage is more than 17.4 V.  
S Chargingsystem  
S Power source circuit  
AVENSIS/CORONA SUP (RM781E)  
DI–209  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
Center J/B  
Instrument Panel J/B  
ECU–IG  
9
14  
A29 IG1  
5
IC  
18  
3A  
18  
3D  
B–R  
B–R  
IE  
B–Y  
I13  
Ignition Switch  
Instrument Panel J/B  
AM1  
2
3
5
W
8
2
1
IA  
IC  
IG1 AM1  
W (RHD)  
W (LHD)  
F17 1  
F17 2  
Engine Room J/B  
Fusible  
Link  
Block  
3
2F  
10  
8
2B  
ALT  
W–B  
GND2  
A29  
1
F15  
2F  
1
6
W–B  
GND1  
W–B  
A29  
B–G  
W–B  
FL Main  
W–B  
W–B  
Battery  
EB  
EA  
EY  
F13395  
AVENSIS/CORONA SUP (RM781E)  
DI–210  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
1
Check ECU–IG fuse.  
PREPARATION:  
Remove the ECU–IG fuse from the instrument panel J/B.  
Instrument Panel J/B  
CHECK:  
Check continuity of the ECU–IG fuse.  
OK:  
Continuity  
ECU–IG  
F12740  
NG  
Check for short circuit in all the harness and  
components connected to ECU–IG fuse (See at-  
tached wiring diagram).  
OK  
2
Check battery voltage.  
OK:  
Voltage: 10 – 14 V  
NG  
Check and repair the charging system.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–211  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
3
Check voltage between terminals IG1 (14) and GND (6, 10) of ABS & BA & TRC &  
VSC ECU.  
PREPARATION:  
Disconnect the connector from the ABS & BA & TRC & VSC  
ECU.  
ON  
6
10  
14  
CHECK:  
(a) Turn the ignition switch ON.  
(b) Measure the voltage between terminals 14 and 6, 10 of  
ABS & BA & TRC & VSC ECU harness side connector.  
OK:  
(+)  
(–)  
Voltage: 10 – 14 V  
F12742  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
NG  
4
Check continuity between terminals GND (6, 10) of ABS & BA & TRC & VSC ECU  
and body ground.  
CHECK:  
6
LOCK  
10  
Measure the resistance between terminal 6, 10 of ABS & BA &  
TRC & VSC ECU harness side connector and body ground.  
OK:  
Resistance: 1 Ω or less  
(+)  
(–)  
F12743  
NG  
Repair or replace harness or connector.  
OK  
Check for open circuit in harness and connector between ABS & BA & TRC & VSC ECU and ECU–  
IG fuse (See page IN–30).  
AVENSIS/CORONA SUP (RM781E)  
DI–212  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZT–01  
DTC  
C1246 / 53 Master Cylinder Pressure Sensor Circuit  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
When any of the following 1. through 3. is detected:  
1. The voltage of sensor signal is out of range (less than  
0.25 V, more than 4.75 V).  
S Master cylinder pressure sensor  
C1246 / 53  
2. The sensor supply voltage is out of range (above 5.6 V,  
below 4.4 V).  
S Master cylinder pressure sensor circuit  
S Stop light FUSE  
3. The sensor signal offset value is out of range.  
4. Stop light fuse is open.  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
O3 Oil Pressure Sensor  
27  
L–Y  
LG  
L–Y  
LG  
1
2
3
1
2
3
A29 VCM  
11  
A29 PMC  
12  
A29  
BR  
BR  
E2  
F13396  
AVENSIS/CORONA SUP (RM781E)  
DI–213  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1, in case of using the hand–held tester and start from step 2, in case of not  
using the hand–held tester.  
1
Check the stop light FUSE and stop light bulb.  
NG  
Check the stop light switch circuit (See Pub. No.  
RM599E on page BE–45)  
OK  
2
Check output value of the master cylinder pressure sensor.  
PREPARATION:  
(a) Connect the hand–held tester to the DLC3.  
(b) Turn the ignition switch ON and push the hand–held tester main switch ON.  
(c) Select the DATALIST mode on the hand–held tester.  
CHECK:  
Check that the brake fluid pressure value of the master cylinder pressure sensor displayed on the hand–held  
tester is changing when depressing the brake pedal.  
OK:  
Brake fluid pressure value must be changing.  
OK  
Go to step 4.  
NG  
3
Check for open and short circuit in harness and connector between master cyl-  
inder pressure sensor and ABS & BA & TRC & VSC ECU (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–214  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
4
Check whether or not the ECU terminal STP input voltage is changed when the  
stop light switch is turned on and off.  
NO  
Check the stop light switch circuit (See Pub. No.  
RM599E on page BE–45).  
YES  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator.  
AVENSIS/CORONA SUP (RM781E)  
DI–215  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZU–01  
DTC  
C1249 / 58  
Stop Light Switch Circuit  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
After the ignition switch is turned ON, the condition that the  
STP terminal voltage of ECU is 55 % to 75 % of supplied  
voltage, continues for 1 sec. or more.  
S Stop light switch  
S Stop light switch circuit  
S Stop light blub  
C1249 / 58  
WIRING DIAGRAM  
ABS & BA & TRC&  
VSC ECU  
Stop Light  
Switch  
Sedan:  
Instrument Panel J/B  
Center J/B  
STOP 10A  
37  
10  
IG  
21  
3F  
21  
3D  
1
5
W–R *  
W
G–W  
1
G–W  
STP  
IA  
A29  
6
W *  
2
8 3C  
G–W  
1
F17  
6
5
G–W  
G–W  
F *1 F *1  
Fusible  
Link  
ID1 II1  
ALT  
120A  
5
6
*
*
Block  
1
F15  
J/C  
B–G  
D *2 D *2  
G–W  
G–W  
High  
FL  
Mounted  
Stop  
Main  
3.0W  
1
2
6
2
4
Stop  
Stop Light  
RH  
Light LH  
W–B  
Light  
4
W–B  
*1: J12(LHD), J28(RHD)  
*2: J13(LHD), J29(RHD)  
*3: J10 (LHD), J30 (RHD)  
*4: J11 (LHD), J31 (RHD)  
*5: LHD  
A *4  
J/C  
A *3  
A *4 A *4  
Battery  
W–B  
A
*3  
W–B  
BL *  
*6: RHD  
W–B  
5
BM  
6
BN *  
F13602  
AVENSIS/CORONA SUP (RM781E)  
DI–216  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
Lift Back (LHD):  
ABS & BA & TRC &  
VSC ECU  
Stop Light  
Switch  
Instrument Panel J/B  
Center J/B  
STOP 10A  
21  
3F  
21  
3D  
37  
A29  
1
IA  
10  
IG  
W
W–R  
G–W  
G–W  
STP  
2
1
8 3C  
1
Fusible F17  
Link  
6
ID1  
G–W  
G–W  
G–W  
Block  
120A  
1
ALT  
D J14 D J14  
BD1  
1
F15  
J/C  
B–G  
F J15 F J15  
G–W  
G–W  
3
G–W  
High  
FL  
Main  
3.0W  
Mounted  
Stop  
1
2
5
Stop  
Stop Light  
LH  
W–B  
Light RH  
W–B  
Light  
3
5
E
E
B
J15  
J15  
J15  
W–B  
J/C  
E J14  
W–B  
Battery  
E J14 B J14  
W–B  
W–B  
BP  
BO  
BQ  
ABS & BA & TRC &  
VSC ECU  
Lift Back (RHD):  
Instrument Panel J/B  
Stop Light  
Switch  
Center J/B  
21  
3D  
STOP 10A  
1
IA  
37  
21  
3F  
10  
IG  
W
G–W  
G–W  
STP  
A29  
2
1
W
8 3C  
1
F17  
5
II1  
G–W  
G–W  
G–W  
Fusible  
Link  
Block  
120A  
ALT  
E J33 D J32  
1
BD1  
1
J/C  
F15  
E J33 E J33  
G–W  
B–G  
G–W  
G–W  
FL  
Main  
3.0W  
High  
1
2
3
5
Stop  
Light LH  
Stop Light  
RH  
Mounted  
Stop  
5
3
Light  
W–B  
Battery  
BQ  
W–B  
W–B  
BP  
BO  
F13603  
AVENSIS/CORONA SUP (RM781E)  
DI–217  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
Wagon:  
ABS &BA & TRC &  
VSC ECU  
Stop Light  
Switch  
Instrument Panel J/B  
STOP 10A  
IA  
37  
21  
3F  
21  
3D  
1
10  
IG  
1
W
G–W  
5
G–W  
W–R *  
STP  
A29  
2
W *  
2
1
8 3C  
G–W  
1
F17  
6
1
2
J16 *  
J34 *  
G–W  
Fusible  
Link  
Block  
ID1 II1  
2
1
120A  
ALT  
*
*
B
1
2
J17 *  
J35 *  
1
F15  
C
C
C
B–G  
FL  
Main  
3.0W  
High  
G–W  
1
G–W  
Stop  
Light LH  
W–B  
G–W  
Mounted  
Stop  
2
2
Stop Light  
RH  
W–B  
Light  
4
A
2
A
4
A
W–B  
1
J17 *  
J35 *  
2
Battery  
1
* :LHD  
* :RHD  
2
J/C  
A
A
W–B  
BS  
W–B  
BR  
F13604  
INSPECTION PROCEDURE  
1
Check operation of stop light.  
CHECK:  
Check that the stop light lights up when the brake pedal is depressed and turns off when the brake pedal  
is released.  
NG  
Repair stop light circuit (See Pub. No. RM599E  
on page BE–45).  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–218  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
2
Check voltage between terminal STP (37) of ABS & BA & TRC & VSC ECU and  
body ground.  
PREPARATION:  
Disconnect the connector from the ABS & BA & TRC & VSC  
ECU.  
CHECK:  
Measure the voltage between terminal 37 of ABS & BA & TRC  
& VSC ECU harness side connector and body ground when the  
brake pedal is depressed.  
37  
OK:  
Voltage: 7.5 – 14 V  
F12745  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
NG  
3
Check for open circuit in harness and connector between terminal STP of ABS &  
BA & TRC & VSC ECU and stop light switch (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Proceed to next circuit inspection shown in problem symptoms table (See page DI–181).  
AVENSIS/CORONA SUP (RM781E)  
DI–219  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZV–01  
DTC  
C1288 / 88  
ECU Version Miss Match  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
When any of the following 1, through 2, is detecte:  
S ABS & BA & TRC & VSC ECU  
1, Engine ECU (M/T) or Engine and ECT ECU (A/T) does  
not match.  
C1288 / 88  
S Engine ECU (M/T) or Engine and ECT ECU (A/T)  
S Steeringanglesensorcalibration.  
2, Steering angle sensor is not calibration.  
INSPECTION PROCEDURE  
1
Check the steering angle sensor calibration.  
NG  
Steering angle sensor calibration (See page  
DI–171).  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–220  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZW–02  
DTC  
C1300 / 62 ABS & BA & TRC & VSC ECU Malfunction  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
ABS & BA & TRC & VSC ECU  
ABS & BA & TRC & VSC ECU internal malfunction is de-  
tected.  
C1300 / 62  
INSPECTION PROCEDURE  
1
Check the DTC for the ABS and VSC (See page DI–171).  
*1  
Repair ABS and VSC control system according  
to the code output.  
*2  
Check for ECU is connected to malfunction  
indicator light.  
*1: Output NG code  
*2: Malfunction indicator light remains ON  
AVENSIS/CORONA SUP (RM781E)  
DI–221  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZX–01  
DTC  
C1350 / 51  
Brake Actuator Pump Motor Failure  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
When any of the following 1. through 3. is detected.  
1. No motor voltage supply after ABS & BA & TRC & VSC  
ECU of the motor relay.  
S Brake actuator pump motor  
C1350 / 51  
2. A high level of motor voltage with no ABS & BA & TRC  
& VSC ECU of the motor relay.  
S Brake actuator pump motor circuit  
3. The pump motor voltage is high level for a certain time  
after the motor relay has elapsed.  
INSPECTION PROCEDURE  
1
Check the DTC once more.  
PREPARATION:  
(a) Clear the DTC (See page DI–171).  
(b) Turn the ignition switch OFF.  
(c) Turn the ignition switch ON.  
CHECK:  
Vehicle speed is more than 6 km/h (4 mph), and check if the same DTC is stored in the memory.  
NO No problem.  
YES  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–222  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZY–01  
DTC  
C1352 / 42  
CAN Communication System Malfunc-  
tion  
CIRCUIT DESCRIPTION  
The circuit is used to send TRC & VSC control information from yaw rate sensor and steering angle sensor  
information to ABS & BA & TRC & VSC ECU  
DTC No.  
DTCDetectingCondition  
TroubleArea  
IG1 voltage is 9.5 V or more, and the condition that data  
from ECU can not be received continues for 1.2 sec. or  
more.  
S Yaw rate sensor circuit  
C1352 / 42  
S Steering angle sensor circuit  
S ABS & BA & TRC & VSC ECU  
AVENSIS/CORONA SUP (RM781E)  
DI–223  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
WIRING DIAGRAM  
Steering Sensor  
6
(Shielded)  
LG–R  
12V  
S23  
5
BR–W  
GND  
S23  
7
W
B
CAN  
HIGH  
S23  
1
CAN  
LOW  
S23  
ABS & BA & TRC  
& VSC ECU  
Yaw Rate Sensor  
30  
4
LG–R  
LG–R  
A29 YIGA  
Y1  
UBAT  
GND  
2
16  
A29  
BR–W  
BR–W  
(Shielded)  
YGND  
SS1  
Y1  
(Shielded)  
(LHD)  
W
13  
3
W
CANH  
CANL  
A29  
Y1  
1
29  
B
B
Y1  
SS2  
A29  
(Shielded)  
(LHD)  
W–B  
Center J/B  
Center J/B  
13  
3A  
4
3F  
9
3F  
9
3E  
W–B  
W–B  
Instrument Panel J/B  
4
IE  
11  
IH  
W–B  
1
* : IH (LHD)  
IK (RHD)  
1
*
F13397  
AVENSIS/CORONA SUP (RM781E)  
DI–224  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
1
Check for open and short circuit in harness and connector between each of ter-  
minals CANLOW and CANHIGH of steering angle sensor, CANL and CANH of  
yaw rate sensor and ABS & BA & TRC & VSC ECU (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–225  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI7ZZ–01  
DTC  
Always ON  
Malfunction in ECU  
ABS Warning Light Circuit  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
Either of the following 1., 2. or 3. is detected:  
1. The ECU connectors are OFF the ECU.  
S Chargingsystem  
Always ON  
2. There is a malfunction in the ECU internal circuit.  
3. There is a malfunction in ABS warning light circuit.  
S ABS warning light circuit  
HINT:  
Hand–held tester may not be able to be used when the ECU is defective.  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
Combination Meter  
10  
Center J/B  
35  
A29  
10  
3A  
10  
3F  
9
P–L  
R–L  
R–L  
R–L  
C11  
C11  
WA  
22  
C11  
1
3F  
ABS  
Instrument Panel J/B  
Ignition SW  
GAUGE 10A  
10  
IF  
5
IC  
B–Y  
8
5
W
AM1  
IG1  
Instrument Panel J/B  
W(RHD)  
W(LHD)  
AM1 40A  
2
3
IC  
1
2
IA  
1
1
F17  
F15  
2 F17  
Fusible  
Link  
Block  
ALT 120A  
FL Main  
3.0W  
B–G  
Battery  
F13398  
AVENSIS/CORONA SUP (RM781E)  
DI–226  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
1
Check that the ECU connectors are securely connected to the ECU.  
NO  
Connect the connector to the ECU.  
YES  
2
Is DTC output?  
Check DTC on page DI–171.  
YES  
Repair circuit indicated by the output code .  
NO  
3
Check for open or short circuit in harness and connector between combination meter  
and ABS & BA & TRC & VSC ECU (WA).  
NG  
Repair or replace harness or connector.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–227  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
4
Check voltage between terminals IG1 (14) and GND (6,10)or ABS & BA & TRC &  
VSC ECU.  
PREPARATION:  
Disconnect the connector from the ABS & BA & TRC & VSC  
ECU.  
ON  
6
10  
14  
CHECK:  
(a) Turn the ignition switch ON.  
(b) Measure the voltage between terminals 14 and 6, 10 of  
ABS & BA & TRC & VSC ECU harness side connector.  
OK:  
(+)  
(–)  
Voltage: 10 – 14 V  
F12742  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
NG  
Repair or replace harness or connector.  
AVENSIS/CORONA SUP (RM781E)  
DI–228  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI800–01  
DTC  
Always ON  
Malfunction in ECU  
VSC Warning Light Circuit  
CIRCUIT DESCRIPTION  
DTC No.  
DTCDetectingCondition  
TroubleArea  
Either of the following 1. or 2. is detected:  
S Chargingsystem  
Always ON  
1. There is a malfunction in the ECU internal circuit.  
2. There is a malfunction in VSC warning light circuit.  
S VSC warning light circuit  
HINT:  
Hand–held tester may not be able to be used when ECU is defective.  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
Combination Meter  
23  
Center J/B  
34  
A29  
10  
3A  
10  
3F  
9
R–L  
R–L  
R–L  
R
C11  
C10  
VSCW  
22  
C11  
1
3F  
VSC  
Instrument Panel J/B  
Ignition SW  
GAUGE 10A  
10  
IF  
5
IC  
B–Y  
8
5
W
AM1  
IG1  
Instrument Panel J/B  
W(RHD)  
W(LHD)  
AM1 40A  
2
3
IC  
1
2
IA  
1
1
F17  
F15  
2 F17  
Fusible  
Link  
Block  
ALT 120A  
FL Main  
3.0W  
B–G  
Battery  
F13398  
AVENSIS/CORONA SUP (RM781E)  
DI–229  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
1
Does both VSC warning light and VSC OFF indicator light go on?  
YES  
Go to step 4.  
NO  
2
Is DTC output?  
Check DTC on page DI–171.  
YES  
Repair circuit indicated by the output code .  
NO  
3
Check for open or short circuit in harness and connector between combination mater  
and ABS & BA & TRC & VSC ECU (WT).  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
NG  
Repair or replace harness or connector.  
4
Is DTC output?  
Check DTC on page DI–171.  
YES  
Repair circuit indicated by the output code .  
NO  
AVENSIS/CORONA SUP (RM781E)  
DI–230  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
5
Check the steering angle sensor calibration.  
NO  
Calibrate the steering angle sensor (See page  
DI–171).  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–231  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI801–01  
ABS Warning Light Circuit (Does Not Light Up)  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
Combination Meter  
Center J/B  
10  
C11  
35  
A29  
10  
3A  
10  
3F  
9
C11  
P–L  
R–L  
R–L  
R–L  
WA  
22  
C11  
1
3F  
ABS  
Instrument Panel J/B  
Ignition SW  
GAUGE 10A  
10  
IF  
5
IC  
B–Y  
8
5
W
AM1  
IG1  
Instrument Panel J/B  
W(RHD)  
W(LHD)  
AM1 40A  
2
3
IC  
1
2
IA  
1
1
F17  
F15  
2 F17  
Fusible  
Link  
Block  
ALT 120A  
FL Main  
3.0W  
B–G  
Battery  
F13398  
AVENSIS/CORONA SUP (RM781E)  
DI–232  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1 in case of using a hand–held tester and start from step 2 in case of not using  
the hand–held tester.  
1
Check operation of the ABS warning light.  
PREPARATION:  
(a) Connect the hand–held tester to the DLC3.  
(b) Turn the ignition switch ON and push the hand–held tester main switch ON.  
(c) Select the ACTIVE TEST mode on the hand–held tester.  
CHECK:  
Check that ”ON” and ”OFF” of the ABS warning light can be shown on the combination meter on the hand–  
held tester.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
NG  
2
Check ABS warning light.  
See combination meter troubleshooting (See Pub. No. RM599E on page BE–57).  
NG Replace or repair bulb or combination meter.  
OK  
Repair or replace and check for open or short circuit in harness and connector.  
AVENSIS/CORONA SUP (RM781E)  
DI–233  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI802–01  
VSC Warning Light Circuit (Does Not Light Up)  
CIRCUIT DESCRIPTION  
If the ECU stores DTC to be necessary to shut down VSC operation, the VSC warning light lights on the  
combination meter.  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
Combination Meter  
Center J/B  
23  
C10  
34  
A29  
10  
3A  
10  
3F  
9
C11  
R–L  
R–L  
R–L  
R
VSCW  
22  
C11  
1
3F  
VSC  
Instrument Panel J/B  
Ignition SW  
GAUGE 10A  
10  
IF  
5
IC  
B–Y  
8
5
W
AM1  
IG1  
Instrument Panel J/B  
W(RHD)  
W(LHD)  
AM1 40A  
2
3
IC  
1
2
IA  
1
1
F17  
F15  
2 F17  
Fusible  
Link  
Block  
ALT 120A  
FL Main  
3.0W  
B–G  
Battery  
F13398  
AVENSIS/CORONA SUP (RM781E)  
DI–234  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1 in case of using the hand–held tester and start from step 2 in case of not  
using the hand–held tester.  
1
Check operation of the VSC warning light.  
PREPARATION:  
(a) Connect the hand–held tester to the DLC3.  
(b) Turn the ignition switch ON and push the hand–held tester main switch ON.  
(c) Select the ACTIVE TEST mode on the hand–held tester.  
CHECK:  
Check that ”ON” and ”OFF” of the VSC warning light can be shown on the combination meter with the hand–  
held tester.  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with astuator assembly.  
NG  
2
Is DTC output?  
YES  
Repair circuit indicated by the output code.  
NO  
3
Check for open and short circuit in harness and connector between ABS & BA &  
TRC & VSC ECU and VSC warning light (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–235  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
4
Check VSC warning light.  
See the combination meter troubleshooting (See Pub. No. RM599E on page BE–57).  
NG Repair or replace bulb or combination meter.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator aseembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–236  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI803–01  
BRAKE Warning Light Circuit  
CIRCUIT DESCRIPTION  
The BRAKE warning light lights up when the brake fluid is insufficient, when the parking brake is applied or  
when the EBD is defective.  
AVENSIS/CORONA SUP (RM781E)  
DI–237  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
Combination  
Meter  
Center J/B  
9
5
20  
10  
3A  
10  
3F  
1
R–W  
R–W  
R–L  
R–L  
EBDW  
A29  
C11  
C11  
22  
C11  
BRAKE  
3F  
EBD  
Resistor  
31  
2
2
B–R  
R–W  
R–W  
R–W  
IC3  
A29 PKB  
IF4  
1
2
R–L  
(LHD) (RHD)  
Instrument Panel J/B  
ECU–IG 5A  
Center J/B  
18  
18  
3A  
9
B–R  
3G  
IE  
5
10  
IF  
B–Y  
IC  
GAUGE 10A  
Ignition SW  
Instrument Panel J/B  
AM1 40A  
1
3
2
W (RHD)  
W
8
5
2
IA  
IC  
AM1  
IG1  
W (LHD)  
F17  
F17  
1
1
2
Fusible  
Link  
ALT 120A  
Block  
1
F15  
Parking  
Brake  
SW  
FL Main  
3.0W  
B–G  
Battery  
F13399  
AVENSIS/CORONA SUP (RM781E)  
DI–238  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
1
Check parking brake switch circuit (See Pub. No. RM599E on page BE–57).  
NG  
Repair or replace parking brake switch circuit.  
OK  
2
Check brake fluid level warning switch circuit (See Pub. No. RM599E on page  
BE–57).  
NG  
Repair or replace brake fluid level warning  
switch circuit.  
OK  
3
Is DTC output for ABS ?  
YES  
Repair circuit indicated by the output code.  
No  
4
Check BRAKE warning light.  
See combination meter troubleshooting (See Pub. No. RM599E on page BE–57).  
NG Repair or replace bulb or combination meter.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–239  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
5
Check for open or short circuit in harness and connector between combination  
meter and ABS & BA & TRC & VSC ECU (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–240  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI804–01  
SLIP Indicator Light Circuit  
CIRCUIT DESCRIPTION  
The SLIP indicator light blinks during TRC & VSC operation.  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
Combination Meter  
Center J/B  
25  
C10  
10  
3A  
10  
3F  
9
C11  
4
A29  
R–L  
R–L  
R–L  
L
IND  
22  
C11  
1
3F  
SLIP  
Instrument Panel J/B  
GAUGE 10A  
10  
Ignition SW  
5
IC  
B–Y  
8
5
W
IF  
AM1  
IG1  
Instrument Panel J/B  
W(RHD)  
W(LHD)  
AM1 40A  
2
3
IC  
1
2
IA  
1
1
F17  
F15  
2 F17  
Fusible  
Link  
Block  
ALT 120A  
FL Main  
3.0W  
B–G  
Battery  
F13398  
AVENSIS/CORONA SUP (RM781E)  
DI–241  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1, in case of using the hand–held tester and start from step 2, in case of not  
using the hand–held tester.  
1
Check operation of the SLIP indicator light.  
PREPARATION:  
(a) Connect the hand–held tester to the DLC3.  
(b) Turn the ignition switch ON and push the hand–held tester main switch ON.  
(c) Select the ACTIVE TEST mode on the hand–held tester.  
CHECK:  
Check that ”ON” and ”OFF” of the SLIP indicator light can be shown on the combination meter with the hand–  
held tester.  
OK  
Go to step 4.  
NG  
2
Check that the SLIP indicator light is ON for 3 seconds immediately after ignition  
switch is turned ON.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
NG  
3
Check SLIP indicator light.  
See combination meter troubleshooting (See Pub. No. RM599E on page BE–57).  
NG  
Repair or replace bulb or combination meter.  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–242  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
4
Check for open and short circuit in harness and connector between ABS & BA  
TRC & VSC ECU and SLIP indicator light (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–243  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI805–01  
VSC OFF Indicator Light, VSC OFF Switch Circuit  
CIRCUIT DESCRIPTION  
This is the TRC & VSC control main switch. When the VSC OFF switch is pressed, TRC & VSC control is  
deactivated and the VSC OFF indicator light lights up. By turning off the ignition switch, TRC & VSC control  
is surely activated when the ignition switch turns ON next time. Also, the VSC OFF indicator light truns ”ON”  
when the ECU prohibit TRC & VSC controls.  
AVENSIS/CORONA SUP (RM781E)  
DI–244  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
Combination  
Meter  
Center J/B  
9
20  
2
10  
3F  
10  
3A  
R–L  
O
R–L  
R–L  
WT  
C11  
C10  
A29  
1
3F  
22  
C11  
VSC  
Off  
G–W  
(LHD)  
Instrument Panel J/B  
GAUGE 10A  
10  
IF  
5
VSC Off SW  
B–Y  
7
42  
IC  
6
IM1  
A29  
CSW  
9
G–R  
G–R  
(RHD)  
(RHD)  
Ignition SW  
W–B  
(LHD)  
Center J/B  
W
8
5
22  
3E  
9
3F  
AM1  
IG1  
W–B  
(RHD)  
13  
3H  
4
3F  
W–B  
Instrument Panel J/B  
AM1 40A  
3
IC  
2
IA  
2
1
13  
3A  
W (RHD)  
W (LHD)  
W–B  
Instrument Panel J/B  
4
11  
IH  
IE  
2
F17  
1
F17  
Fusible  
Link  
Block  
W–B  
ALT 120A  
F15  
1
FL Main  
3.0W  
B–G  
1
Battery  
* : IH (LHD)  
IK (RHD)  
1
*
F13400  
AVENSIS/CORONA SUP (RM781E)  
DI–245  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1 in case of using the hand–held tester and start from step 2 in case of not  
using the hand–held tester.  
1
Check operation of the VSC OFF indicator light.  
PREPARATION:  
(a) Connect the hand–held tester to the DLC3.  
(b) Turn the ignition switch ON and push the hand–held tester main switch ON.  
(c) Select the ACTIVE TEST mode on the hand–held tester.  
CHECK:  
Check that ”ON” and ”OFF” of the VSC OFF indicator light can be shown on the combination meter with the  
hand–held tester.  
NG  
Go to step 4.  
OK  
2
Check VSC OFF switch.  
PREPARATION:  
(a) Remove the VSC OFF switch.  
(b) Disconnect the VSC OFF switch connector.  
CHECK:  
1
4
Measure the resistance between terminals 1 and 4 of the VSC  
OFF switch when the VSC OFF switch is ON and OFF.  
OK:  
(+)  
(–)  
VSC OFF switch  
Pressed  
Resistance  
Continuity  
F00052  
Released  
1MΩ or higher  
NG  
Replace VSC OFF switch.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–246  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
3
Check for open and short circuit in harness and connector between terminal  
CSW of ABS & BA & TRC & VSC ECU and VSC OFF switch and body ground (See  
page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
4
Check VSC OFF indicator light.  
See combination meter troubleshooting (See Pub. No. RM599E on page BE–57).  
NG  
Repair or replace bulb or combination meter.  
OK  
5
Check for open and short circuit in harness and connector between terminal WT  
of ABS & BA & TRC & VSC ECU and VSC OFF indicator light (See page  
IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–247  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI806–01  
VSC Buzzer Circuit  
CIRCUIT DESCRIPTION  
The VSC buzzer sounds during VSC operation.  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
VSC Warning  
Buzzer  
Center J/B  
15  
A29 BZ  
1
3B  
10  
3A  
R–L  
G
R–L  
2
1
Buzzer  
Instrument Panel J/B  
Ignition SW  
GAUGE 10A  
10  
IF  
5
IC  
B–Y  
W
8
5
IG1  
AM1  
W (RHD)  
W (LHD)  
Instrument Panel J/B  
AM1 40A  
1
3
2
2
IA  
IC  
1
1
2 F17  
F17  
F15  
Fusible  
Link  
Block  
ALT 120A  
B–G  
FL Main  
3.0W  
Battery  
F13401  
AVENSIS/CORONA SUP (RM781E)  
DI–248  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
INSPECTION PROCEDURE  
HINT:  
Start the inspection from step 1 in case of using the hand–held tester and start from step 3 in case of not  
using the hand–held tester.  
1
Check operation of the VSC buzzer.  
PREPARATION:  
(a) Connect the hand–held tester to the DLC3.  
(b) Turn the ignition switch ON and push the hand–held tester main switch ON.  
(c) Select the ACTIVE TEST mode on the hand–held tester.  
CHECK:  
Check ”ON–OFF” function of the VSC buzzer with the hand–held tester.  
OK  
Check and replace ABS & BA & TRC & VSC ECU  
with actuator assembly.  
NG  
2
Check voltage between terminal 1 of VSC buzzer and body ground.  
PREPARATION:  
Disconnect the connector from VSC buzzer.  
CHECK:  
(a) Turn the ignition switch ON.  
(b) Measure voltage between terminal (1) of VSC buzzer and body ground.  
OK:  
Voltage: 10 – 14 V  
NG  
Repair or replace harness or connector from  
battery to VSC buzzer.  
OK  
AVENSIS/CORONA SUP (RM781E)  
DI–249  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
3
Check VSC buzzer.  
PREPARATION:  
Disconnect the VSC buzzer connector.  
CHECK:  
1
(+)  
(–)  
2
Apply battery voltage to the terminals 1 and 2 of VSC buzzer  
connector, and check that the VSC buzzer sounds.  
F02192  
NG  
Replace VSC buzzer.  
OK  
4
Check for open and short circuit in harness and connector between ABS & BA &  
TRC & VSC ECU and VSC buzzer (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–250  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI807–01  
Tc Terminal Circuit  
CIRCUIT DESCRIPTION  
Connecting between terminals Tc and CG of the DLC3 causes the ECU to display DTC by blinking the ABS  
warning light, VSC warning light and BRAKE warning light.  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
J44  
Junction  
D8  
DLC3  
Connector  
17  
13  
4
LG–R  
LG–R  
F
F
CG  
TC  
TC  
A29  
W–B  
Junction  
Connector  
J1 (LHD)  
J27 (RHD)  
1
*
1
* : II (LHD)  
IJ (RHD)  
F04476  
INSPECTION PROCEDURE  
1
Check voltage between terminals Tc and CG of DLC3.  
CHECK:  
ON  
(a) Turn the ignition switch ON.  
(b) Measure voltage between terminals Tc and CG of DLC3.  
Tc  
(+)  
(–)  
OK:  
DLC3  
Voltage: 10 – 14 V  
CG  
F09678  
OK  
If each warning light does not blink even afterTc  
and CG are connected, the ECU may be defec-  
tive.  
NG  
AVENSIS/CORONA SUP (RM781E)  
DI–251  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
2
Check for open and short circuit in harness and connector between ABS & BA &  
TRC & VSC ECU and DLC3, DLC3 and body ground (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–252  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI808–01  
Ts Terminal Circuit  
CIRCUIT DESCRIPTION  
The sensor check circuit detects abnormality in the speed sensor signal which cannot be detected with the  
DTC check.  
Connecting terminals Ts and CG of the DLC3 starts the check.  
WIRING DIAGRAM  
ABS & BA &  
TRC & VSC ECU  
D8  
DLC3  
28  
A29  
4
14  
R–B  
TS  
CG  
TS  
W–B  
J1(LHD)  
J27(RHD)  
Junction  
Connector  
1
1
* : II(LHD)  
IJ(RHD)  
*
F04477  
INSPECTION PROCEDURE  
1
Check voltage between terminals Ts and CG of DLC3.  
CHECK:  
(a) Turn the ignition switch ON.  
(b) Measure the voltage between terminals Ts and CG of  
ON  
Tc  
(–)  
(+)  
DLC3.  
OK:  
DLC3  
Voltage: 10 – 14 V  
CG  
F09679  
OK  
If ABS warning light does not blink even after Ts  
and CG are connected, the ECU may be defec-  
tive.  
NG  
AVENSIS/CORONA SUP (RM781E)  
DI–253  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
2
Check for open and short circuit in harness and connector between ABS & BA &  
TRC & VSC ECU and DLC3, DLC3 and body ground (See page IN–30).  
NG  
Repair or replace harness or connector.  
OK  
Check and replace ABS & BA & TRC & VSC  
ECU with actuator assembly.  
AVENSIS/CORONA SUP (RM781E)  
DI–254  
DIAGNOSTICS  
–
ABS WITH EBD & BA & TRC & VSC SYSTEM  
DI809–01  
Check for Fluid Leakage  
Check for fluid leakage from actuator or hydraulic lines.  
F04266  
AVENSIS/CORONA SUP (RM781E)  

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