Get DIAGNOSTICS -> Anti-Lock Brake System With EBD Guide for Toyota Avensis 4 Door First Generation (1997-2003)

DI–127

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC BRAKE

FORCE DISTRIBUTION (EBD)

DI7YR–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–128

Check and Clear DTC (Precheck)

P. DI–129

Symptom

does not occur

Symptom Simulation

PDI–127.

3

4

Problem Symptom Confirmation

Symptom

occurs

Normal code

5

DTC Check

P. DI–129

Malfunction code

7

6

8

Problem Symptoms Table

P. DI–135

DTC Chart

P. DI–132

9

Sensor Check

Check for Fluid Leakage

P. DI–168

Circuit Inspection

P. DI–136 – DI–166

Identification of Problem

Repair

10

11

Confirmation Test

End

Fail safe function:

When a failure occurs in the ABS system, the ABS warning light is lit and the ABS operation is prohibited. In addition

to this, when the failure which disables the EBD operation occurs, the brake warning light is lit as well and EBD

operation is prohibited.

AVENSIS/CORONA SUP (RM781E)

DI–128

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7YS–01

CUSTOMER PROBLEM ANALYSIS CHECK

ABS Check Sheet

Inspector’s

Name

:

Registration No.

Registration Year

Frame No.

/

Customer’s Name

Date Vehicle

Brought In

km

Odometer Reading

/

miles

Date Problem First Occurred

Frequency Problem Occurs

/

Continuously

Intermittently (

times a day)

ABS does not operate.

ABS does not operate intermittently.

Symptoms

ABS Warning Light

Abnormal

Remains ON

Does not Light Up

Brake Warning

Light Abnormal

Malfunction Code (Code

)

1st Time

2nd Time

Normal Code

DTC Check

AVENSIS/CORONA SUP (RM781E)

DI–129

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7YT–01

PRE–CHECK

1.

DIAGNOSIS SYSTEM

(a) Release the parking brake lever.

(b) Check the indicator.

When the ignition switch is turned ON, check that the ABS

warning light and brake warning light goes on for 3 se-

conds.

HINT:

S

F12747

F04969

F00103

When the parking brake is applied or the level of the brake

fluid is low, the brake warning light is lit.

If the indicator check result is not normal, proceed to trou-

bleshooting for the ABS warning light circuit or brake

warning light circuit (See page DI–159, DI–161).

S

(c) Check the DTC

(1) Using SST, connect terminals Tc and CG of DLC3.

Tc

SST 09843 –18040

(2) Turn the ignition switch ON.

(3) Read the DTC from the ABS warning light on the

combination meter.

HINT:

S

DLC3

If no code appears, inspect the diagnostic circuit or ABS

warning light circuit (See page DI–164 or DI–159).

CG

S

As an example, the blinking patterns for normal code and

codes 11 and 21 are shown on the left.

(4) Codes are explained in the code table on page

DI–132.

(5) After completing the check, disconnect terminals Tc

and CG, and turn off the display.

Normal Code

0.25 secs.

0.5 secs.

ON

If 2 or more malfunctions are indicated at the same time the low-

est numbered DTC will be displayed 1st.

OFF

Code 11 and 21

0.5 secs.

1.5 secs.

0.5 secs.

2.5 secs.

4 secs.

ON

OFF

Code 11 Code 21

AVENSIS/CORONA SUP (RM781E)

DI–130

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

(d) Clear the DTC.

(1) Using SST, connect terminals Tc and CG of DLC3.

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 3 seconds.

(4) Check that the warning light shows the normal

code.

(5) Remove the SST from the terminals of DLC3.

SST 09843 – 18040

BR3890

HINT:

Cancellation cannot be done by removing the battery cable or

ECU–IG fuse.

2.

SPEED SENSOR SIGNAL

Ts

(a) Check the speed sensor signal.

(1) When the ignition switch is turned ON, check that

the ABS warning light goes on for 3 seconds.

(2) Turn the ignition switch OFF.

(3) Using SST, connect terminals Ts and CG of DLC3.

SST 09843 – 18040

DLC3

(4) Start the engine.

CG

F04969

(5) Check that the ABS warning light blinks.

HINT:

0.13 secs.

0.12 secs.

If the ABS warning light does not blink, inspect the ABS warning

light circuit (See page DI–159).

(6) Drive vehicle straight forward.

Drive vehicle at 45 – 55 km/h (28 – 34 mph) for sev-

eral seconds.

ON

OFF

HINT:

If the brake is applied during the check, the check routine must

be started again.

BR3904

(7) Stop the vehicle.

(8) Turn the ignition switch OFF.

(9) Disconnect the SST from terminals Ts and CG, and

connect the SST to terminals Tc and CG of DLC3.

SST 09843 – 18040

(10) Turn the ignition switch ON.

AVENSIS/CORONA SUP (RM781E)

DI–131

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

(11) Read the number of blinks of the ABS warning light.

HINT:

S

See the list of DTC shown below.

S

If every sensor is normal, a normal code is output (A cycle

of 0.25 secs. ON and 0.25 secs. OFF is repeated).

If 2 or more malfunctions are indicated at the same time,

the lowest numbered code will be displayed 1st.

S

Malfunction Code (Example Codes 72, 76)

7

6

2

ON

OFF

1.5 secs.

2.5 secs.

0.5 secs.

4 secs.

Repeat

0.5 secs.

BR3893

(12) After doing the check, disconnect the SST from ter-

minals Tc and CG of DLC3 and turn ignition switch

OFF.

SST 09843 –18040

DTC of the speed sensor check function:

Code No.

Diagnosis

TroubleArea

S Right front speed sensor

S Sensorinstallation

71

Low output voltage of right front speed sensor

S Right front speed sensor rotor

S Left front speed sensor

72

73

74

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 Left front speed sensor rotor

S Right rear speed sensor

S Sensorinstallation

S Right rear speed sensor rotor

S Left rear speed sensor

S Sensorinstallation

S Left rear speed sensor rotor

Abnormal change in output voltage of right front speed sen-

sor

75

76

Right front speed sensor rotor

Left front speed sensor rotor

Right rear speed sensor rotor

Abnormal change in output voltage of left front speed

sensor

Abnormal change in output voltage of right rear speed

sensor

77

78

Abnormal change in output voltage of left rear speed sensor Left rear speed sensor rotor

AVENSIS/CORONA SUP (RM781E)

DI–132

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7YU–01

DIAGNOSTIC TROUBLE CODE CHART

HINT:

S

Using SST 09843 –18040, connect the terminals Tc and CG.

S

If a malfunction code is displayed during the DTC check, check the circuit listed for that code. For de-

tails of each code, turn to the page referred to under the ”See page” for respective ”DTC No.” in the

DTC chart.

DTC No.

DetectionItem

TroubleArea

(See Page)

S ABS solenoid valve relay

11

ABS solenoid valve relay faulty

S Valve supply voltage

S ECU

(DI–136)

S ABS motor relay

S Pump motor voltage

S Pump motor lead disconnected

S ECU

13

ABS pump motor faulty

(DI–138)

21

Right front solenoid valves faulty

ABS actuator (right front inlet or outlet solenoid valve)

ABS actuator (left front inlet or outlet solenoid valve)

ABS actuator (right rear inlet or outlet solenoid valve)

ABS actuator (left rear inlet or outlet solenoid valve)

(DI–140)

22

Left front solenoid valves faulty

(DI–140)

23

Right rear solenoid valves faulty

(DI–140)

24

Left rear solenoid valves faulty

(DI–140)

31

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 wheel speed sensor circuit

Open circuit in left front wheel speed sensor circuit

(DI–142)

32

S Right front, left front, right rear and left rear speed sensor

(DI–142)

S Each speed sensor circuit

S Sensorinstallation

S ECU

33

(DI–142)

34

(DI–142)

35

S Right front, left front speed sensor

S Each speed sensor circuit

S ECU

(DI–142)

36

(DI–142)

S Speed sensor

S Sensor rotor

S ECU

37

Speed sensor rotor is wrong number of teeth on one of the 4

wheels

(DI–147)

38

Open circuit in right rear wheel speed sensor circuit

Open circuit in left rear wheel speed sensor circuit

S Right rear, left rear speed sensor

S Each speed sensor circuit

S ECU

(DI–142)

39

(DI–142)

S Battery

41

S ICregulator

S Power source circuit

S ECU

Low battery voltage

(DI–149)

S Stop light switch

S Stop light switch circuit

S ECU

58

Open circuit in stop light switch circuit

Malfunction in ECU

(DI–153)

62

ECU

(DI–157)

AVENSIS/CORONA SUP (RM781E)

DI–133

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7YV–01

PARTS LOCATION

ABS Warning Light

Brake Warning Light

RearSpeedSenser

ABS Actuator

(w/ ECU, Relay)

Front SpeedSensor

Rear Speed Senser

Rotor

Front SpeedSensor

Rotor

DLC3

F04286

AVENSIS/CORONA SUP (RM781E)

DI–134

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7YW–01

TERMINALS OF ECU

A6

F10161

Symbols (TerminalsNo.)

WiringColor

Condition

STD Voltage (V)

+B (A6 – 17, 18) – GND (A6 –

16, 19)

B ↔ W–B

Constant

10 – 14

IG1(A6 – 15) – GND (A6 – 16,

19)

B–R ↔ W–B

IG switch ON

IG switch ON, ABS warning light ON

IG switch ON, ABS warning light OFF

Stop light switch OFF

10 – 14

Below 2.6

Below 1.5

5 – 14

WA (A6 – 20) – GND (A6 – 16,

19)

P–L ↔ W–B

G–W ↔ W–B

STP (A6 – 14) – GND (A6 – 16,

19)

Stop light switch ON

Tc (A6 – 12) – GND (A6 – 16,

19)

LG–R ↔ W–B

R–B ↔ W–B

IG switch ON

5.7 – 8.1

Ts (A6 – 11) – GND (A6 – 16,

19)

*1

W–R ↔ B

IG switch ON,

FR+ (A6 – 5) – FR– (A6 – 4)

FL+ (A6 – 7) – FL– (A6 – 6)

RR+ (A6 – 2) – RR– (A6 – 1)

RL+ (A6 – 9) – RL– (A6 – 8)

ACgeneration

*2

slowly turn right front wheel

W

↔ B

IG switch ON,

R ↔ L–W

slowly turn left front wheel

*1

P ↔ L–R

IG switch ON,

*2

slowly turn right rear wheel

P ↔ L

IG switch ON,

Y ↔ BR

ACgeneration

slowly turn left rear wheel

SP1 (A6 – 10) – GND (A6 – 16,

19)

L ↔ W–B

Vehicle driveing at about 20 km/h (12 mph)

Pulsegeneration

IG switch ON, parking brake switch ON

IG switch ON, parking brake switch OFF

IG switch ON, shift lever P or N range

IG switch ON, except shift lever P or N range

IG switch ON, brake warning light OFF

IG switch ON, brake warning light ON

Below 2.6

10 – 14

PKB (A6 – 13) – GND (A6 – 16,

19)

R–W ↔ W–B

B–W ↔ W–B

R–W ↔ W–B

10 – 14

PN (A6 – 23) – GND (A6 – 16,

19)

Below 1.6

Below 2.6

10 – 14

EBDW (A6 – 21) – GND

(A6 – 16, 19)

^*1: LHD

^*2: RHD

AVENSIS/CORONA SUP (RM781E)

DI–135

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7YX–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.

Symptoms

InspectionCircuit

See page

Only when 1.to 4. are all normal and the problem is still occurring, replace the

ABS ECU.

1. Check the DTC reconfirming that the normal code is output.

2. Power source circuit

DI–129

DI–149

DI–142

DI–168

ABS does not operate.

3. Speed sensor circuit

4. Check the hydraulic circuit for leakage.

Only when 1. το 4. are all normal and the problem is still occurring, replace the

ABS ECU.

ABS does not operate

intermittently.

1. Check the DTC reconfirming that the normal code is output.

2. Speed sensor circuit

DI–129

DI–142

DI–153

DI–168

3. Stop light switch circuit

4. Check the hydraulic circuit for leakage.

ABS warning light

abnormal.

1. ABS warning light circuit

2. ABS ECU

DI–159

Brake warning light

abnormal.

1. Brake warning light circuit

2. ABS ECU

DI–161

Only when 1. and 2. are all normal and the problem is still occurring, replace the

ABS ECU.

DTC check cannot be done.

1. ABS warning light circuit

2. Tc terminal circuit

DI–159

DI–164

Speed sensor signal check

cannot be done.

1. Ts terminal circuit

2. ABS ECU

DI–166

AVENSIS/CORONA SUP (RM781E)

DI–136

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7YY–01

CIRCUIT INSPECTION

DTC

11

ABS Solenoid Valve 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 3.:

3. 3 or more solenoid valves are detected faulty in re-

sponse and at the same time valve supply voltage is

detectedfaulty.

S ABS solenoid valve relay

11

S Valve supply voltage

S ECU

4. Solenoid valve relay will not be switched OFF.

5. Valve relay is stuck in spite of its high valve relay supply

voltage.

WIRING DIAGRAM

4

2

(* ) (* )

2

B

EA1 EC1

1

* : 1ZZ–FF,3ZZ–FE,3S–FE

1

B

2

* : 1CD–FTV

EA1 EC1

3

* : 1AZ–FSE

17 A6

+B

18 A6

+B

Valve Relay

4

* : Except 1CD–FTV

5

F20

1

* : LHD

6

* : RHD

Fusible

Link

Block

ABS

60A

Motor Relay

ECU

ALT

2

140A*

120A*

100A*

3

1

F15

1

2

B (* )

3

B–G(* )

1

W(* )

FL Main

16

A6

2, 3

W–B

GND

3.0w* *

Engine Room J/B

1

GND

2.0L*

8

2B

A6 19

W–B

1

W–B

2F

5

W–B

J9 (* )

6

J27 (* )

A

Battery

W–B

5

3

2F

J1 (* )

J/C

6

W–B

J20 (* )

W–B

J/C

EA

EB

IJ

II

F13402

AVENSIS/CORONA SUP (RM781E)

DI–137

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

INSPECTION PROCEDURE

1

Check voltage between terminals A6 – 17, 18 and A6 – 16, 19 of ABS actuator

connector.

PREPARATION:

LOCK

Disconnect the ABS actuator connector.

CHECK:

Measure the voltage between terminals A6 – 17, 18 and A6 –

16, 19 of ABS actuator harness side connector.

OK:

A6

18

17

(–)

(+)

Voltage: 10 – 14 V

16

19

F00064

NG

Check and replace fuses.

Check and repair harness or connector.

OK

If the same code is still output after the DTC is deleted, check the contact condition of each con-

nection. If the connections are normal, the ECU may be defective.

AVENSIS/CORONA SUP (RM781E)

DI–138

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7YZ–01

DTC

13

Pump Motor Circuit

CIRCUIT DESCRIPTION

The ABS motor relay supplies power to the ABS pump motor. While the ABS is activated, the ECU switches

the ABS motor relay ON and operates the ABS pump motor.

DTC No.

DTCDetectingCondition

TroubleArea

Detection of any conditions from 1. through 3.:

1. After actuating the motor relay, voltage will not be sup-

plied to the pump motor within 0.4 secs.

2. Although the voltage supplied to the pump motor is in a

high level, motor relay will not actuate for 2.5 secs, or

more.

S ABS motor relay

S Pump motor voltage

13

S Pump motor lead disconnected

S ECU

3. The voltage supplied to the pump motor keeps low level

for louger than 0.4 secs. and the pump repeats activat-

ing for 7 secs. 3times maximally. After the last activation,

the pump motor has been gone dead because of short

circuit.

WIRING DIAGRAM

4

2

(* ) (* )

2

B

EA1 EC1

1

* : 1ZZ–FF,3ZZ–FE,3S–FE

1

B

2

* : 1CD–FTV

EA1 EC1

3

* : 1AZ–FSE

17 A6

+B

18 A6

+B

Valve Relay

4

* : Except 1CD–FTV

5

F20

1

* : LHD

6

* : RHD

Fusible

Link

Block

ABS

60A

Motor Relay

ECU

ALT

2

140A*

120A*

100A*

3

1

F15

1

2

B (* )

3

B–G(* )

1

W(* )

FL Main

16

A6

2, 3

W–B

GND

3.0w* *

Engine Room J/B

1

GND

2.0L*

8

2B

A6 19

W–B

1

W–B

2F

5

W–B

J9 (* )

6

J27 (* )

A

Battery

W–B

5

3

2F

J1 (* )

J/C

6

W–B

J20 (* )

W–B

J/C

EA

EB

IJ

II

F13402

AVENSIS/CORONA SUP (RM781E)

DI–139

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

INSPECTION PROCEDURE

1

Check voltage between terminals A6 – 17, 18 and A6 – 16, 19 of ABS actuator

connector.

PREPARATION:

LOCK

Disconnect the ABS actuator connector.

CHECK:

Measure the voltage between terminals A6 – 17, 18 and A6 –

16, 19 of ABS actuator harness side connector.

OK:

A6

17

(–)

(+)

Voltage: 10 – 14 V

16

19 18

F00064

NG

Check and replace fuses.

Check and repair harness or connector.

OK

If the same code is still output after the DTC is deleted, check the contact condition of each con-

nection. If the connections are normal, the ECU may be defective.

AVENSIS/CORONA SUP (RM781E)

DI–140

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z0–01

DTC

21, 22, 23, 24

ABS Solenoid Valve 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

21, 22, 23, 24

Solenoid valve signal does not match for the check result.

Each solenoid valve

WIRING DIAGRAM

4

2

(* ) (* )

2

B

EA1 EC1

1

* : 1ZZ–FF,3ZZ–FE,3S–FE

1

B

2

* : 1CD–FTV

EA1 EC1

3

* : 1AZ–FSE

A6

+B

17

18 A6

+B

Valve Relay

4

* : Except 1CD–FTV

5

1

F20

* : LHD

6

* : RHD

Fusible

Link

Block

ABS

60A

Motor Relay

ECU

ALT

2

140A*

120A*

100A*

3

1

F15

1

2

B (* )

3

B–G(* )

1

W(* )

FL Main

16

A6

2, 3

W–B

GND

3.0w* *

Engine Room J/B

1

GND

2.0L*

8

2B

A6 19

W–B

1

W–B

2F

5

W–B

J9 (* )

6

J27 (* )

A

W–B

Battery

5

3

2F

J1 (* )

J20 (* )

J/C

6

W–B

J/C

EA

EB

IJ

II

F13402

AVENSIS/CORONA SUP (RM781E)

DI–141

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

INSPECTION PROCEDURE

1

Check the DTC once more.

PREPARATION:

(a) Clear the DTC (See page DI–129).

(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

Replace ABS ECU.

AVENSIS/CORONA SUP (RM781E)

DI–142

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z1–01

DTC 31, 32, 33, 34, 35, 36, 38, 39 Speed Sensor Circuit

CIRCUIT DESCRIPTION

The speed sensor detects wheel speed and sends the ap-

propriate signals to the ECU. These signals are used to control

the ABS system. The front and rear rotors each have 48 serra-

tions.

When the rotors rotate, the magnetic field emitted by the perma-

nent magnet in the speed sensor generates an AC voltage.

Since the frequency of this AC voltage changes in direct propor-

tion to the speed of the rotor, the frequency is used by the ECU

to detect 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

Detection of any of conditions from 1. through 3.:

1. Vehicle speed is more than 40 km/h (25 mph), pulses

are not input for 0.01 secs.

2. After the initial start or restart and when the vehicle

speed has reached 12 km/h (7 mph), the wheel with 0

km/h (0 mph) of wheel speed was detected.

3. After the initial start or restart and when the vehicle

speed has reached 70 km/h (44 mph), front wheel with 0

km/h (0 mph) of wheel speed was detected.

4. In case that the vehicle equipped with the temporaly tire

is driven with high speed but without low pressure in that

temporalytire.

S Right front, left front, right rear, left rear speed sensor

S Each speed sensor circuit

S Sensorinstallation

S ECU

31, 32, 33, 34

S Tire pressure

S Right front, left front, right rear, left rear speed sensor

Detecting abnormality in the resistance value of each speed

sensor.

35, 36, 38, 39

S Each speed sensor circuit

S ECU

HINT:

S

DTC Nos. 31 and 35 are for the right front speed sensor.

DTC Nos. 32 and 36 are for the left front speed sensor.

DTC Nos. 33 and 38 are for the right rear speed sensor.

DTC Nos. 34 and 39 are for the left rear speed sensor.

AVENSIS/CORONA SUP (RM781E)

DI–143

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

WIRING DIAGRAM

ABS ECU with

Actuator

Left Front

Speed Sensor

1

7

A6

R

FL+

FL–

6

2

L–W

A6

1

Right Front

Speed Sensor

W (* )

2

(Shielded)

W–R (* )

5

1

IH2

W

1

A6

FR+

FR–

1

(* )

4

A6

2

IH2

3

IH2

B

1

B (* )

R (* )

2

W–B

Left Rear

Speed Sensor

1 Y

1

(* )

(Shielded)

9

A6

9

Y

IC1 ID1

RL+

RL–

2

(* )

8

A6

10 10

IC1 ID1

1

2

1

BR

B (* )

(* )

11

2

BR (* )

ID1

2

(* )

W–B

Right Rear

7

II1

1

(* )

Speed Sensor

1

(Shielded)

2

8

7

P

A6 RR+

II1 II1

1

(* )

1

9

8

2

RR–

A6

II1

1

L (* )

V (* )

L (* )

2

(* )

2

L–R (* )

A

19

A

W–B

A6 GND

2

*1

J1 (* ), J20( )

J/C

W–B

A

2

*1

J9 (* ), J27( )

J/C

IJ

II

1

* RHD

*2

LHD

F13403

AVENSIS/CORONA SUP (RM781E)

DI–144

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

INSPECTION PROCEDURE

1

Check speed sensor.

Front

PREPARATION:

(a) Remove the front fender liner.

1

(b) Disconnect the speed sensor connector.

CHECK:

2

Measure 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 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 side seatback.

(b) Disconnect the speed sensor connector.

CHECK:

2

Measure 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 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–129).

OK

AVENSIS/CORONA SUP (RM781E)

DI–145

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

2

Check for open and short circuit in harness and connector between each speed

sensor and 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 is tightened properly and there is

no clearance 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–129).

OK

4

Check speed sensor and sensor rotor serrations.

REFERENCE: INSPECTION USING OSCILLOSCOPE

PREPARATION:

Normal Signal Waveform

(a) Remove the ABS ECU.

(b) Connect the oscilloscope to the terminals FR+, FL+, RR+

or RL+ and GND of the ABS ECU.

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 ECU.

NG

AVENSIS/CORONA SUP (RM781E)

DI–146

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

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 or 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.

Rear

PREPARATION:

Remove the axle hub (See Pub. No. RM599E on page SA–10).

CHECK:

Check the sensor rotor serrations.

OK:

No scratches or 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–129).

OK

Check and replace ABS ECU.

AVENSIS/CORONA SUP (RM781E)

DI–147

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z2–01

DTC

37

Speed Sensor Rotor Faulty

CIRCUIT DESCRIPTION

DTC No.

DTCDetectingCondition

Detection of any of conditions from 1. through 3.:

TroubleArea

1. Occurrence of differential to some degree in the wheel

speed between the front and rear wheels of either left or

right side of the vehicle and the front left and right

wheels. (Detection of differential in mini tire size, spin-

ning wheel and decelerating wheel.)

S Speed sensor

S Sensor rotor

S ECU

2. Continuous ABS control for 60 secs. or more.

3. Interference on 1 or more wheels for 20 secs. with the

brake pedal depressed, or for 5 secs. when the brake

pedal is not depressed.

37

S Tire pressure

4. In case that the vehicle equipped with the temporaly tire

is driven with high speed but without low pressure in that

temporalytire.

INSPECTION PROCEDURE

1

Check sensor rotor (See page DI–142).

NG

Replace sensor rotor.

OK

2

Check speed sensor (See page DI–142).

NG

Replace speed sensor.

OK

AVENSIS/CORONA SUP (RM781E)

DI–148

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

3

Check for open or short circuit in harness and connector between speed sensor

and ECU (See page IN–30).

NG

Repair or replace harness and connector.

OK

Check and replace ABS ECU.

AVENSIS/CORONA SUP (RM781E)

DI–149

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z3–01

DTC

41

Power Source Circuit

CIRCUIT DESCRIPTION

This circuit is the power source for the ECU, hence the actuators.

DTC No.

DTCDetectingCondition

TroubleArea

When the vehicle speed is at aprox. 6 km/h (4 mph), low

battery voltage is less than 9.4 V at the time of non–opera-

tion of ABS control or less than 8.8 V at the time of opera-

tion of ABS control, and high battery voltage is more than

17.4 V.

S Battery

S ICregulator

S Power source circuit

S ECU

41

Fail safe function:

If trouble occurs in the power source circuit, the ECU cuts off current to the ABS solenoid valve relay and

prohibits ABS control.

WIRING DIAGRAM

4

2

(* ) (* )

Center J/B

Instrument Panel J/B

2

B

EA1 EC1

ECU–IG

9

18

3A

B–R

15

B–R

1

IE

3D

B

EA1 EC1

18 A6 17 A6 A6

1

+B

* : 1ZZ–FF,3ZZ–FE,3S–FE

IG1

1 F20

2

* : 1CD–FTV

Valve Relay

ABS

60A

3

* : 1AZ–FSE

4

* : Except 1CD–FTV

Fusible

Link

5

* : LHD

6

* : RHD

Block

Motor Relay

ECU

ALT

1

F15

2

B (* )

3

B–G(* )

FL Main

16

A6

1

2, 3

W(* )

GND

W–B

3.0w* *

Engine Room J/B

1

2.0L*

GND

A6

2B 8

1

19

W–B

2F

5

W–B

J9 (* )

W–B

6

J27 (* )

A

5

3

2F

W–B

J1 (* )

J20 (* )

J/C

Battery

J/C

6

W–B

IJ

II

EB

EA

F13404

AVENSIS/CORONA SUP (RM781E)

DI–150

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

INSPECTION PROCEDURE

1

Check battery voltage.

Voltage: 10 – 14 V

OK:

NG

Check and replace fuses.

Check and repair the charging system.

OK

2

Check voltage between terminals IG1 and GND of ABS actuator connector.

PREPARATION:

ON

Disconnect ABS actuator connector.

CHECK:

(a) Turn the ignition switch ON.

(b) Measure voltage between terminals IG1 and GND of ABS

actuator harness side connector.

OK:

IG1

GND

Voltage: 10 – 14 V

(+)

(–)

F00067

NG

Check and replace fuses.

Repair or replace harness or connector.

OK

AVENSIS/CORONA SUP (RM781E)

DI–151

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

3

Check continuity between terminals GND of ABS actuator connector and body

ground.

CHECK:

LOCK

Measure resistance between terminals GND of ABS actuator

harness side connector and body ground.

OK:

Resistance: 1 Ω or less

(+)

GND

(–)

F00068

NG

Repair or replace harness or connector.

OK

AVENSIS/CORONA SUP (RM781E)

DI–152

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

4

Check ECU–IG fuse.

PREPARATION:

Remove ECU–IG fuse from instrument panel J/B.

Instrument Panel J/B

CHECK:

Check continuity of ECU–IG fuse.

OK:

ECU–IG

Continuity

F12740

NG

Check for short circuit in all the harness and

components connected to ECU–IG fuse (See at-

tached wiring diagram.

OK

Check and replace ABS ECU.

AVENSIS/CORONA SUP (RM781E)

DI–153

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z4–01

DTC

58

Stop Light Switch Circuit

CIRCUIT DESCRIPTION

DTC No.

58

DTCDetectingCondition

TroubleArea

Stop light switch circuit is open circuit, and stop light switch S Stop light switch

voltage is in the level between 65 % or more and less

than 93 % of the battery voltage.

S Stop light switch circuit

S ECU

WIRING DIAGRAM

ABS ECU with

Actuator

Stop Light

Switch

Sedan:

Instrument Panel J/B

Center J/B

STOP 10A

14

STP

A6

10

IG

21

3F

21

3D

1

5

W–R *

W

G–W

1

G–W

IA

6

W *

2

8 3C

G–W

1

F17

6

5

G–W

ALT

G–W

F *1 F *1

Fusible

Link

ID1 II1

7

8

9

140A *

120A *

100A *

5

6

*

Block

1

F15

J/C

7

B *

8

9

B–G *

D *2 D *2

G–W

W *

High

FL

Mounted

Stop

Main

1

6

2

4

Stop

7, 8

9

Stop Light

RH

3.0W * *

2.0L *

Light LH

W–B

Light

2

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

*6: RHD

*7: 1CD–FTV

A *4

J/C

A *3

A *4 A *4

Battery

W–B

A

*3

W–B

BL *

W–B

5

*8: 1AZ–FSE

*9: 1ZZ–FE,3ZZ–FE,3S–FE

BM

6

BN *

F13602

AVENSIS/CORONA SUP (RM781E)

DI–154

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

Lift Back (LHD):

ABS ECU with

Actuator

Stop Light

Switch

Instrument Panel J/B

Center J/B

STOP 10A

21

3F

21

3D

14

1

IA

10

IG

W

W–R

1

G–W

STP

A6

2

1

2

140A *

120A *

100A *

8 3C

F17

Fusible

Link

6

ID1

3

G–W

Block

ALT

D J14 D J14

1

BD1

1

F15

J/C

1

B *

B–G *

W *

2

F J15 F J15

G–W

3

G–W

3

High

FL

Main

Mounted

Stop

1

5

Stop

Stop Light

LH

W–B

1, 2

3.0W * *

Light RH

W–B

3

Light

2.0L *

2

3

5

E

B

J15

W–B

J/C

E J14

W–B

Battery

BQ

E J14 B J14

W–B

BP

1

* :1CD–FTV

2

* :1AZ–FSE

3

* :1ZZ–FE,3ZZ–FE,3S–FE

BO

ABS ECU with

Actuator

Lift Back (RHD):

Instrument Panel J/B

Stop Light

Switch

Center J/B

21

3D

STOP 10A

1

IA

14

21

3F

10

IG

W

G–W

STP

A6

2

1

W

1

140A *

120A *

100A *

2

3

8 3C

1

F17

5

II1

G–W

Fusible

Link

Block

ALT

E J33 D J32

1

BD1

1

J/C

F15

1

B *

2

E J33 E J33

G–W

B–G *

W *

G–W

3

FL

Main

3.0W * *

2.0L *

High

1

2

3

5

1, 2

Stop

Light LH

Stop Light

RH

Mounted

Stop

3

5

3

Light

W–B

Battery

BQ

W–B

1

* :1CD–FTV

2

* :1AZ–FSE

3

BP

BO

* :1ZZ–FE,3ZZ–FE,3S–FE

F13603

AVENSIS/CORONA SUP (RM781E)

DI–155

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

Wagon:

ABS ECU with

Actuator

Stop Light

Switch

Instrument Panel J/B

STOP 10A

IA

14

21

3F

21

3D

1

10

IG

1

W

G–W

5

G–W

W–R *

STP

A6

2

W *

2

1

8 3C

G–W

1

F17

6

3

4

5

1

2

140A *

120A *

100A *

J16 *

J34 *

G–W

Fusible

Link

Block

ID1 II1

2

1

ALT

*

B

1

2

J17 *

J35 *

1

F15

3

B *

B–G *

4

C

W *5

FL

High

G–W

Stop

G–W

Main

3.0W * *

2.0L *

Mounted

Stop

2

1

2

3, 4

Stop Light

RH

W–B

5

Light LH

Light

4

A

2

A

4

A

W–B

1

J17 *

J35 *

J/C

2

Battery

1

* :LHD

* :RHD

* :1CD–FTV

* :1AZ–FSE

2

A

W–B

BS

3

W–B

4

5

BR

* :1ZZ–FE,3ZZ–FE,3S–FE

F13604

INSPECTION PROCEDURE

1

Check operation of stop light.

CHECK:

Check that stop light lights up when brake pedal is depressed and turns off when brake pedal is released.

NG

Repair stop light circuit (See Pub. No. RM599E

on BE–57).

OK

AVENSIS/CORONA SUP (RM781E)

DI–156

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

2

Check voltage between terminal STP of ABS actuator and body ground.

PREPARATION:

Disconnect ABS actuator connector.

CHECK:

(–)

(+)

Measure voltage between terminal STP of ABS actuator har-

STP

ness side connector and body ground when brake pedal is de-

pressed.

OK:

Voltage: 8 – 14 V

F00069

OK

Proceed to next circuit inspection shown in

problem symptoms table (See page DI–135).

NG

3

Check for open circuit in harness and connector between ABS ECU and stop

light switch (See page IN–30).

NG

Repair or replace harness or connector.

OK

Check and replace ABS ECU.

AVENSIS/CORONA SUP (RM781E)

DI–157

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z5–01

DTC

62

ABS ECU Malfunction

CIRCUIT DESCRIPTION

DTC No.

62

DTCDetectingCondition

ABS ECU continuously detected the inproper operation of

ABS.

TroubleArea

S Battery

S ECU

INSPECTION PROCEDURE

1

Is DTC output?

Check DTC on page DI–129.

YES

Repair circuit indicated by the output code.

NO

2

Is normal code displayed?

YES

Check for short circuit in harness and connec-

tor between DLC3 and ABS ECU (See page

IN–30).

NO

3

Does ABS warning light go off?

YES

Check open and short circuit of the harness and

connector in the Tc circuit between ECU and

DLC3.

NO

AVENSIS/CORONA SUP (RM781E)

DI–158

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

4

Check voltage between terminals IG1 and GND of ABS actuator connector.

PREPARATION:

ON

Disconnect ABS actuator connector.

CHECK:

(a) Turn the ignition switch ON.

(b) Measure voltage between terminals IG1 and GND of ABS

actuator harness side connector.

OK:

IG1

Voltage: 10 – 14 V

(+)

(–)

GND

F00067

YES

Check for open or short circuit in harness and

connector between ECU–IG fuse and ABS ac-

tuator (See page IN–30).

OK

5

Check connection of ABS actuator connector.

CHECK:

(a) Check the connection of the ABS actuator connector.

(b) Check the ABS warning light goes off.

OK

Check and replace ABS ECU.

NG

Repair or replace harness or connector.

AVENSIS/CORONA SUP (RM781E)

DI–159

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z6–01

ABS Warning Light Circuit

CIRCUIT DESCRIPTION

If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At

this time, the ECU records a DTC in memory.

Connecting terminals Tc and CG of the DLC3 makes the ABS warning light blink and output the DTC.

WIRING DIAGRAM

ABS Actuator

with ECU

ABS Warning

Light

Center J/B

Instrument Panel J/B

10

C11

20

A6 WA

9

C11

22

C11

10

IF

10

3A

10

3F

1

3F

5

IC

R–L

P–L

Combination

Meter

B–Y

Instrument Panel J/B

AM1

Ignition S/W

Fusible Link

Block

3

2

F17

1

1)

1

W(LHD)

W(RHD)

2

B (*

W

5

2

IC

IA

B–G (* )

8

1

3)

W (*

40A

F15

F17

Battery

FL Main

1

2

3

140A *

120A *

100A *

1

2

3.0W (* , * )

2.0L (* )

3

1

* : 1CD–FTV

2

* : 1AZ–FSE

3

* : 1ZZ–FE, 3ZZ–FE, 3S–FE

F13405

AVENSIS/CORONA SUP (RM781E)

DI–160

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

INSPECTION PROCEDURE

Troubleshoot in accordance with the chart below for each trouble symptom.

ABS warning light does not light up

Go to step 1

Go to step 2

ABS warning light remains ON

1

Check ABS warning light.

See combination meter troubleshooting (See Pub. No. RM599E on page BE–57).

NG Repair bulb or combination meter assembly.

OK

Check for open circuit in harness and connector between GAUGE fuse and ABS ECU (See page

IN–30).

2

Is DTC output?

Check DTC on page DI–129.

YES

Repair circuit indicated by the output code.

NO

Check for short circuit in harness and connector between ABS warning light, DLC3 and ECU (See

page IN–30).

AVENSIS/CORONA SUP (RM781E)

DI–161

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z7–01

BRAKE Warning Light Circuit

CIRCUIT DESCRIPTION

The BRAKE warning light lights up when the brake fluid is insufficient, parking brake is applied or the EBD

is defective.

WIRING DIAGRAM

ABS Actuator

with ECU

P2

Parking Brake

Switch

2

13

A6

R–W

1

R–W

PKB

IC4 IC3

(RHD) (LHD)

BRAKE Warning

Center J/B

Instrument Panel J/B

10

Light

5

21

1

22

C11

9

10

3A

5

GAUGE

10A

R–L

R–W

R–L

IF

A6 EBDW

IC

3F

10

3F

C11

R–L

C11

Combination

Meter

B–Y

Ignition S/W

Fusible Link

Block

AM1

40A

1

3

IC

2

1A

B (* )

2

F17

1

2

W(LHD)

W(RHD)

1

W

5

2

B–G (* )

3

8

W (* )

1

ALT

F15

F17

FL Main

1

140A *

1,

2

3.0W (* * )

2

120A *

3

Battery

2.0L (* )

3

100A *

1

* : 1CD–FTV

* : 1AZ–FSE

* : 1ZZ–FE, 3ZZ–FE, 3S–FE

2

3

F13406

AVENSIS/CORONA SUP (RM781E)

DI–162

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

INSPECTION PROCEDURE

1

Check parking brake switch circuit (See Pub. No. RM599E on page BE–45).

NG

Repair or replace parking brake switch circuit.

OK

2

Check brake fluid level warning switch circuit (See Pub. No. RM599E on page

BE–45).

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 combination meter.

OK

AVENSIS/CORONA SUP (RM781E)

DI–163

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

5

Check for open or short circuit in harness and connector (See page IN–30).

NG

Repair or replace harness or connector.

OK

Check and replace ABS ECU.

AVENSIS/CORONA SUP (RM781E)

DI–164

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z8–01

Tc Terminal Circuit

CIRCUIT DESCRIPTION

Connecting between terminals Tc and CG of the DLC3 causes the ECU to display the DTC by flashing the

ABS warning light.

WIRING DIAGRAM

ABS ECU with

Actuator

DLC3

J44 J/C

12

W–B

LG–R

F

LG–R

A6

Tc

CG

Tc

4

13

A

J1 (LHD)

J/C

J27 (RHD)

II (LHD)

IJ (RHD)

F04476

INSPECTION PROCEDURE

1

Check voltage between terminals Tc and CG of DLC3.

CHECK:

(a) Turn the ignition switch ON.

(b) Measure voltage between terminals Tc and CG of DLC3.

Tc

OK:

Voltage: 5.7 – 8.1 V

CG

DLC3

F09678

OK

If ABS warning light does not blink even after Tc

and CG are connected, the ECU may be defec-

tive.

NG

AVENSIS/CORONA SUP (RM781E)

DI–165

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

2

Check for open and short circuit in harness and connector between ABS ECU

and DLC3, DLC3 and body ground (See page IN–30).

NG

Repair or replace harness or connector.

OK

Check and replace ABS ECU.

AVENSIS/CORONA SUP (RM781E)

DI–166

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7Z9–01

Ts Terminal Circuit

CIRCUIT DESCRIPTION

The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected with

the DTC check.

Connecting terminals Ts and CG of the DLC3 on the lower finish panel starts the check.

WIRING DIAGRAM

ABS ECU with

Actuator

DLC3

11

A6 Ts

R–B

W–B

CG

Ts

4

14

A

J1 (LHD)

J/C

J27 (RHD)

II (LHD)

IJ (RHD)

F04477

INSPECTION PROCEDURE

1

Check voltage between terminals Ts and CG of DLC3.

CHECK:

Ts

(a) Turn the ignition switch ON.

(b) Measure voltage between terminals Ts and CG of DLC3.

OK:

Voltage: 5.7 – 8.1 V

DLC3

CG

F04969

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–167

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

2

Check for open and short circuit in harness and connector between ABS ECU

and DLC3 and body ground (See page IN–30).

NG

Repair or replace harness or connector.

OK

Check and replace ABS ECU.

AVENSIS/CORONA SUP (RM781E)

DI–168

DIAGNOSTICS

–

ANTI–LOCK BRAKE SYSTEM WITH ELECTRONIC

BRAKE FORCE DISTRIBUTION (EBD)

DI7ZA–01

Check for Fluid Leakage

Check for fluid leakage from actuator or hydraulic lines.

F04266

AVENSIS/CORONA SUP (RM781E)

DIAGNOSTICS -> Anti-Lock Brake System With EBD for Your Toyota Avensis 4 Door First Generation (1997-2003)

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DIAGNOSTICS

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