Get DIAGNOSTICS -> Engine Immobiliser System Guide for Toyota Avensis 4 Door First Generation (1997-2003)

DI–255

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FG–03

HOW TO PROCEED WITH TROUBLESHOOTING

Troubleshooting 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–256

Check and Clear DTC (Pre–check)

P. DI–257

Symptom

dose not occur

3

4

Symptom Simulation

P. IN–20

Problem Symptom Confirmation

Symptom

occurs

5

6

Normal code

DTC Check

P. DI–257

Malfunction code

7

Problem Symptoms Table

P. DI–263

DTC Chart

P. DI–259

8

Circuit Inspection and Part Inspection

P. DI–264

Identification of Problem

9

Repair

10

Confirmation Test

End

Step 2, 5 : Diagnostic steps permitting the

use of the hand–held tester

AVENSIS/CORONA SUP (RM781E)

DI–256

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FH–01

CUSTOMER PROBLEM ANALYSIS CHECK

ENGINE IMMOBLISER Check Sheet

Inspector’s

:

Name

Registration No.

Registration Year

Frame No.

/

Customer’s Name

Date Vehicle

Brought In

km

miles

Odometer Reading

/

Date Problem First Occurred

Frequency Problem Occurs

/

Continuous

Intermittent (

times a day)

Immobiliser is not set.

(Enginestarts with key codes other than the registered key code.)

Symptoms

Engine does not start.

Malfunction

Normal

Remains ON

Does not Light Up

Check Item

DTC Check

Indicator Light

Normal Code

Malfunction Code (Code

)

1st Time

2nd Time

AVENSIS/CORONA SUP (RM781E)

DI–257

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7W6–02

PRE–CHECK

Hand–held Tester

1.

DIAGNOSIS SYSTEM

(a) Description

Engine ECU controls the function of immobiliser on this

vehicle.

Data of the immobiliser or DiagnosticTrouble Code (DTC)

can be read from the Data Link Connector 3 (DLC3) of the

vehicle. When a trouble occurs in immobiliser, Malfunc-

tion Indicator Lamp (MIL) does not light ON but DTC in-

spection is performed.

DLC3

D01600

Therefore when there seems to be a trouble with immobi-

liser, use hand–held tester or SST (diagnosis check wire

No. 2) to check and troubleshoot it.

(b) Inspect the DLC3.

The vehicle’s engine ECU uses ISO 14230 for commu-

nication.

The terminal arrangement of the DLC3 complies with

SAE J1962 and matches the ISO 14230 format.

1 2 3 4 5 6 7 8

9 10 11121314 1516

DLC3

A04550

Testerconnection

Condition

Duringcommunication

Always

Specifiedcondition

Pulsegeneration

1 Ω or less

7 (Bus + Line) – 5 (Signal Ground)

4 (Chassis Ground) – Body Ground

5 (Signal Ground) – Body Ground

16 (B+) – Body Ground

Always

1 Ω or less

Always

9 – 14 V

HINT:

If your display shows ”UNABLE TO CONNECT TO VEHICLE”

when you have connected the cable of the hand–held tester to

the DLC3, turned the ignition switch ON and operated the

hand–held tester, there is a problem on the vehicle side or tool

side.

S

If communication is normal when the tool is connected to

another vehicle, inspect the DLC3 on the original vehicle.

If communication is still impossible when the tool is con-

nected to another vehicle, the problem is probably in the

tool itself, so consult the Service Department listed in the

tool’s instruction manual.

S

AVENSIS/CORONA SUP (RM781E)

DI–258

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

2.

INSPECT DIAGNOSIS

(a) Using hand–held tester:

Check the DTC.

NOTICE:

Hand–held tester only:

When the diagnosis system is switched from the normal

mode to the check mode, it erases all DTCs and freezed

frame data recorded in the normal mode. So before switch-

ing the modes, always check the DTCs and freezed frame

data, and note them down.

(1) Prepare the hand–held tester.

(2) Connect the hand–held tester to the DLC3 under

the instrument panel lower pad.

Hand–held Tester

(3) Turn the ignition switch ON and push the hand–held

tester switch ON.

(4) Use the hand–held tester to check the DTCs and

freeze frame data; note them down. (For operating

instructions, see the hand–held tester instruction

book.)

DLC3

(5) See page DI–259 to confirm the details of the DTCs.

(b) Clear the DTC.

D01600

The following procedures will erase the DTCs and freeze

frame data.

(1) Operating the hand–held tester to erase the codes.

(See the hand–held tester instruction book for oper-

ating instructions.)

(2) Disconnecting the battery terminals or EFI fuse.

AVENSIS/CORONA SUP (RM781E)

DI–259

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FJ–02

DIAGNOSTIC TROUBLE CODE CHART

DTC No.

DetectionItem

(Seepage)

TroubleArea

B2795

S Key

Unmatched Key Code

(DI–264)

S Unregistered key inserted before

S Key

B2796

S Transponderkeyamplifier

S Wire harness

S Engine ECU

No Communication in Immobiliser System

(DI–265)

S Wire harness

B2797

S Transponderkeyamplifier

S Unregistered key inserted before

S Engine ECU

CommunicationMalfunctionNo. 1

CommunicationMalfunctionNo. 2

(DI–267)

S Key

B2798

S Transponderkeyamplifier

S Wire harness

S Engine ECU

(DI–268)

HINT:

To reduce the unnecessary exchange of engine ECU, check that a trouble occurs with the original engine

ECU at the time of exchanging engine ECU and the problem will be solved with a new engine ECU.

AVENSIS/CORONA SUP (RM781E)

DI–260

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FK–03

PARTS LOCATION

Engine Room J/B

S EFI Fuse

S EFI Relay

Engine ECU

Transponder Key Amplifier

DLC3

Ignition Switch

I19380

AVENSIS/CORONA SUP (RM781E)

DI–261

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI80I–01

TERMINALS OF ECU

1AZ–FSE Engine ECU Terminals

E17

E13

E14

E16

E15

D03442

D01054

Symbols (TerminalNo.)

WiringColor

B – BR

Condition

STD Voltage (V)

9 – 14

CODE (E13–14) –

E1 (E16–3)

Ignition switch ON

RXCK 〈E13–13) –

B–O – BR

B–W – BR

9 – 14

E1 (E16–3)

TXCT 〈E13–21) –

E1 (E16–3)

1ZZ–FE (A/T) Engine and ECT ECU Terminals

E20

E21

E19

E18

9

8 7 6 5 4 3

2 1

7 6 5 4 3

2 1

9 8 7

6 5 4 3 2 1

7 6

5 4 3 2 1

21201918 17161514131211 10 1615141312 11 10 9 8

313029 2827 2625242322 242322 2120191817

19181716 15141312 11 10 15141312 11 10 9 8

282726252423 222120 2221201918 1716

D05962

Symbols (TerminalNo.)

WiringColor

B – BR

Condition

STD Voltage (V)

9 – 14

CODE (E20–7) –

E1(E19–17)

Ignition switch ON

RXCK (E20–26) –

E1(E19–17)

B–O – BR

B–W – BR

9 – 14

TXCT(E20–15) –

E1(E19–17)

AVENSIS/CORONA SUP (RM781E)

DI–262

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

1ZZ–FE (M/T) and 3ZZ–FE Engine ECU Terminals

E18

E20

E19

D00032

Symbols (TerminalNo.)

WiringColor

B – BR

Condition

STD Voltage (V)

9 – 14

CODE (E20–19) –

E1(E18–14)

Ignition switch ON

RXCK (E20–20) –

E1(E18–14)

B–O – BR

B–W – BR

9 – 14

TXCT(E20–18) –

E1(E18–14)

AVENSIS/CORONA SUP (RM781E)

DI–263

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

SuspectedArea

DI7FM–02

PROBLEM SYMPTOMS TABLE

Symptom

See page

Immobiliser is not set

1. Engine ECU

IN–30

(Engine starts with key codes other than the registered key code)

Engine does not start

1. Key

L

2. Wire harness

3. Transponderkeyamplifier

4. Engine ECU

IN–30

–

IN–30

L: Check that the key which did not start the engine has been registered and that it is possible to start with

other already registered key codes.

AVENSIS/CORONA SUP (RM781E)

DI–264

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FN–01

CIRCUIT INSPECTION

DTC

B2795 Unmatched Key Code

CIRCUIT DESCRIPTION

This DTC is output when an unregistered key is inserted. When this DTC is output, delete DTC and insert

the key of the customer to check that DTC B2795 is output.

When the key that outputs DTC B2795, register this key. When DTC B2795 is not output, there is a possibility

that the unregistered key has been inserted before. (Engine ECU is normal.)

Inquire of a customer the condition of using the system to find the cause of the trouble.

(Example: Another key has been inserted, etc.)

DTC No.

DTCDetectionCondition

TroubleArea

S Key

B2795

Unmatched key code

S Unregistered key inserted before

INSPECTION PROCEDURE

1

Delete DTC and insert all presently available keys to check whether engine starts

or not.

HINT:

When inserting the key that does not start the engine, DTC B2795 is stored in memory.

RESULT:

OK

NG

All keys starts engine.

A specific key does not start engine.

OK

No problem.

HINT:

If the result is ”OK”, please confirm whether or not customers

have ever inserted the unregistered key or the immobiliser key

(with transponder chip) of other vehicle in the ignition key cylin-

der, and find out the cause of detecting DTC.

NG

Register key that does not start engine.

AVENSIS/CORONA SUP (RM781E)

DI–265

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FO–03

DTC

B2796 No Communication in Immobiliser system

CIRCUIT DESCRIPTION

DTC No.

DTCDetectionCondition

TroubleArea

S Key

S Transponderkeyamplifier

S Wire harness

B2796

Nocommunication

S Engine ECU

WIRING DIAGRAM

Transponder Key Amplifier

Engine ECU

14 19

7

B

CODE

E13 E20 E20

*1 *2 *3

13 20 26

E13 E20 E20

*1 *2 *3

8

B–O

B–W

RXCK

TXCT

21 18 15

9

TXCT

E13 E20 E20

*1 *2 *3

*1: 1AZ FSE

*2: 1ZZ–FE (M/T), 3ZZ–FE

*3: 1ZZ–FE (A/T)

I19381

AVENSIS/CORONA SUP (RM781E)

DI–266

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

INSPECTION PROCEDURE

1

Delete DTC and insert all presently available keys to check whether engine starts

or not

RESULT:

A

B

C

All keys start engine.

A specific key does not start engine. In this case, DTC B2796 is stored in memory.

All keys do not start engine. In this case, DTC B2796 is stored in memory.

A

No problem at this time.

HINT:

If the result is ”A”, please confirm whether or not customers

have ever inserted the key (without transponder chip) of other

vehicle in the ignition key cylinder, and find out the cause of de-

tecting DTC.

B

Transponder chip of a specific key is defective.

Replace key.

C

2

Check harness and connector between transponder key amplifier and engine

ECU (See page IN–30).

NG

Repair or replace harness or connector.

OK

3

Does it operate normally after replacement of transponder key amplifier ?

Yes

Replace transponder key amplifier.

No

Check and replace engine ECU

(See page IN–30).

AVENSIS/CORONA SUP (RM781E)

DI–267

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FP–03

DTC

B2797 Communication Malfunction No. 1

CIRCUIT DESCRIPTION

This code is detected when an error occurs despite of normal communication.

(Example: Some noise is included in communication line.)

DTC No.

B2797

DTCDetectionCondition

TroubleArea

S Wire harness

S Transponderkeyamplifier

S Unregistered key inserted before

S Engine ECU

Communicationerror

WIRING DIAGRAM

Refer to DTC B2796 on page DI–265.

INSPECTION PROCEDURE

1

Check noise.

PREPARATION:

Insert already registered master key in the key cylinder.

CHECK:

Using an oscilloscope or hand–held tester, check that noise is

included in the CODE terminal of the engine ECU.

OK:

No noise is detected.

Noise

NG

Try to find cause of noise and remove it.

I02681

OK

2

Does it operate normally after replacement of transponder key amplifier?

Yes

Replace transponder key amplifier.

No

Check and replace engine ECU

(See page IN–30).

AVENSIS/CORONA SUP (RM781E)

DI–268

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FQ–02

DTC

B2798 Communication Malfunction No. 2

CIRCUIT DESCRIPTION

DTC No.

DTCDetectionCondition

TroubleArea

S Key

S Transponderkeyamplifier

S Wire harness

B2798

Communicationerror

S Engine ECU

WIRING DIAGRAM

Refer to DTC B2796 on page DI–265.

INSPECTION PROCEDURE

1

Check harness and connector between transponder key amplifier and engine

ECU (See page IN–30).

NG

Repair or replace harness or connector.

OK

2

Does it operate normally after replacement of transponder key amplifier?

Yes

Replace transponder key amplifier.

No

Check and replace engine ECU

(See page IN–30).

AVENSIS/CORONA SUP (RM781E)

DI–269

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

DI7FR–03

Power Source Circuit

CIRCUIT DESCRIPTION

This circuit provides power to operate the transponder key amplifier.

WIRING DIAGRAM

Engine Room J/B

W

Transponder

Key Amplifier

4

EFI Relay

(* )

1

2H

6

2B

EFI

E/G

W

L–Y

5

3

2

3

BAT

(* )

1

3

2F

4

2B

B

1

W–B

1

2F

W–B

B–G

Center J/B

From

Terminal

MREL

of

13

3A

13

3F

W–B

GND

10

Engine

ECU

Instrument Panel

J/B

IE

4

FL

MAIN

*1: LHD

*2: RHD

*3: 1AZ–FE

IH 11

W–B

*4: 1ZZ–FE, 3ZZ–FE

W–B

Battery

1

IH *

IK *

2

EB

EA

I20881

AVENSIS/CORONA SUP (RM781E)

DI–270

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

INSPECTION PROCEDURE

1

Check voltage between terminals +B and GND of transponder key amplifier con-

nector.

PREPARATION:

(a) Turn the ignition switch OFF.

10

1

(b) Disconnect the transponder key amplifier connector.

CHECK:

Measure the voltage between terminals +B and GND of the

transponder key amplifier connector.

OK:

(+)

(–)

Voltage: 9 – 14 V

I20882

OK

Proceed to next circuit inspection shown in

problem symptoms table (See page DI–263).

NG

2

Check EFI fuse.

PREPARATION:

Remove the EFI fuse from the engine room J/B.

Engine Room J/B

EFI Fuse

CHECK:

Check the continuity of the EFI fuse.

OK:

Continuity

NG

Check for short in all harness and components

connected to EFI fuse.

A05531

OK

AVENSIS/CORONA SUP (RM781E)

DI–271

DIAGNOSTICS

–

ENGINE IMMOBILISER SYSTEM

3

Check harness and connector between transponder key amplifier and body

ground (See page IN–30).

NG

Repair or replace harness or connector.

OK

Check and repair harness and connector be-

tween transponder key amplifier and battery

(See page IN–30).

AVENSIS/CORONA SUP (RM781E)

DIAGNOSTICS -> Engine Immobiliser System for Your Toyota Avensis 4 Door First Generation (1997-2003)

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