Toyota Sequoia (2005). Manual - part 443

I28464

ECM

Sub J/B No.4

23

E4

13

28

T5

15

A20

5

4E

TC

TC

5

4B

5

4C

5

4D

5

4A

15

1F

9

1A

J43 
J/C

12

T17

P–B

P–B

Translate ECU

TC

P–B

P–B

O

O

4

TC

CG

D6
DLC3

Airbag Sensor
Assembly

Instrument Panel J/B

Tire Pressure
ECU

P–B

G

A

A

IG

TC

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

DI–1567

1761

Diagnosis circuit

CIRCUIT DESCRIPTION

Making a short circuit between terminals TC and CG of the DLC3 will output DTCs from the DLC3.

WIRING DIAGRAM

HINT:
When a particular warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an
internal ground short in the relevant ECU is suspected.

DIDF5–01

I28460

E4

TC

ECM Wire Harness View:

C00083

TC

D6

DLC3:

DI–1568

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

1762

INSPECTION PROCEDURE

1

Check harness and connector (TC of DLC3 – ECM).

PREPARATION:
Disconnect the E4 connector from the ECM.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Symbol 

(Tester connection)

Condition

Specified condition

TC (E4–23) – TC (D6–13)

Always

Below 1 

Ω

NG

Repair or replace harness or connector.

OK

C00083

CG

D6

DLC3:

C00083

TC

DLC3:

D6

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

DI–1569

1763

2

Check harness and connector (CG of DLC3 – Body ground).

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Symbol 

(Tester connection)

Condition

Specified condition

CG (D6–4) – Body ground

Always

Below 1 

Ω

NG

Repair or replace harness or connector.

OK

3

Check harness and connector (TC of DLC3 – Body ground).

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Symbol 

(Tester connection)

Condition

Specified condition

TC (D6–13) – Body

ground

Always

10 k

Ω 

or higher

NG

Repair or replace harness, connector or each
ECU.

OK

Replace ECM (See page 

IN–35

).

DID65–01

DI–1570

–

DIAGNOSTICS

ENGINE IMMOBILISER SYSTEM

1764

ENGINE IMMOBILISER SYSTEM

PRECAUTION

NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.

System Name

See Page

Back Door Power Window Control System

BE–77