Toyota Sequoia (2005). Manual - part 321

F19698

ECM

MREL

8

E4

B–W

14

IA4

B–W

B–R

12

IA4

B–R

B–R

B–R

J16
J/C

D

D

D

1

E4

2

E4

+B

+B2

Engine Room J/B

EF1 Relay

2

2H

6

2H

1

2D

1

2F

3

2

5

1

B

W–B

W–B

W–B

7

E8

E01

EB

ED

J5
J/C

A

F10
FL Block

B

4

5

B

Battery

EF1 No.1

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

DI–1079

1273

ECM Communication Stop Mode

MODE DESCRIPTION

Detection Item

Symptom

Trouble Area

ECM Communica-

tion Stop Mode

”ENGINE” is not displayed on the ”BUS CHECK” screen
of the hand–held tester.

DTCs are output from each ECU in ECM communication
stop mode as shown in the ”DTC COMBINATION TABLE”
(see page 

DI–1067

).

Power source or inside the ECM

WIRING DIAGRAM

DIDI9–01

F19705

E4

+B2

E01

E8

ECM Wire Harness View:

+B

DI–1080

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

1274

INSPECTION PROCEDURE

1

Check wire harness (ECM – Battery and ECM – Body ground).

PREPARATION:
Disconnect the ECM connectors (E4) and (E8).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester connection

Condition

Specified value

E8–7 (E01) – 

Body ground

Always

Below 1 

Ω

CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Tester connection

Condition

Specified value

E4–1 (+B) – 
Body ground

Ignition Switch ON

10 to 14 V

E4–2 (+B2) – 

Body ground

Ignition Switch ON

10 to 14 V

NG

Repair or replace wire harness or connector
(ECM – Battery or ECM – Body ground).

OK

Replace ECM (See page 

SF–80

).

F19699

Translate ECU

IG1

1

T5

B–R

A

J37

J/B

A

J37

B–R

Sub J/B No.3

8

3C

8

3A

B–R

Instrument Panel J/B

ECU–IG

4

1C

6

1C

4

1F

1

1L

AM1

2

1

B–Y

2

I18
Ignition SW

W–L

1

IG1

AM1

W

8

5

B

ALT

F10
FL Block

Battery

40

T5

O

A

A

O

J43
J/C

IG

GND

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

DI–1081

1275

Translate ECU Communication Stop Mode

MODE DESCRIPTION

Detection Item

Symptom

Trouble Area

Translate ECU

Communication

Stop Mode

”TRANSLATE ECU” is not displayed on the ”BUS
CHECK” screen of the hand–held tester.

DTCs are output from each ECU in translate ECU com-
munication stop mode as shown in the ”DTC COMBINA-
TION TABLE” (see page 

DI–1067

).

Power source or inside the translate ECU

WIRING DIAGRAM

DIDIA–01

F19152

IG1

T5

Translate ECU Wire Harness View:

GND

DI–1082

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

1276

INSPECTION PROCEDURE

1

Check wire harness (Translate ECU – Battery and Translate ECU – Body ground).

PREPARATION:
Disconnect the translate ECU connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester connection

Condition

Specified value

T5–40 (GND) – 

Body ground

Always

Below 1 

Ω

CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Tester connection

Condition

Specified value

T5–1 (IG1) – 

Body ground

Ignition Switch ON

10 to 14 V

NG

Repair or replace wire harness or connector
(Translate ECU – Battery or Translate ECU –
Body ground).

OK

Replace translate ECU.