Toyota Sequoia (2005). Manual - part 329

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

F19737

DLC3:

D6

CANH

CANL

BAT

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

DI–1111

1305

7

Check CAN bus line for short to +B (Suspension control ECU sub bus line).

PREPARATION:
Disconnect the suspension control ECU connector (S25).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester connection

Condition

Specified value

D6–16 (BAT) – 

D6–6 (CANH)

Ignition Switch OFF

1 M

Ω

 or higher

D6–16 (BAT) – 

D6–14 (CANL)

Ignition Switch OFF

1 M

Ω

 or higher

OK

Replace suspension control ECU 
(See page 

SA–171

).

NG

Repair or replace suspension control ECU
sub bus line or connector (CAN–H, CAN–L).

8

Connect the connector.

Reconnect the ECM main bus line connector (J53) to the junction connector.

NEXT

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

F19737

DLC3:

D6

CANH

CANL

BAT

DI–1112

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

1306

9

Check CAN bus line for short to +B (ECM main bus line).

PREPARATION:
Disconnect the ECM connector (E5).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester connection

Condition

Specified value

D6–16 (BAT) – 

D6–6 (CANH)

Ignition Switch OFF

1 M

Ω

 or higher

D6–16 (BAT) – 

D6–14 (CANL)

Ignition Switch OFF

1 M

Ω

 or higher

OK

Replace ECM (See page 

SF–80

).

NG

Repair or replace ECM main bus line or con-
nector (CAN–H, CAN–L).

10

Connect the connector.

Reconnect the translate ECU main bus line connector (J55) to the junction connector.

NEXT

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

F19737

DLC3:

D6

CANH

CANL

BAT

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

DI–1113

1307

11

Check CAN bus line for short to +B (Translate ECU main bus line).

PREPARATION:
Disconnect the translate ECU connector (T5).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester connection

Condition

Specified value

D6–16 (BAT) – 

D6–6 (CANH)

Ignition Switch OFF

1 M

Ω

 or higher

D6–16 (BAT) – 

D6–14 (CANL)

Ignition Switch OFF

1 M

Ω

 or higher

OK

Replace translate ECU.

NG

Repair or replace translate ECU main bus line
or connector (CAN–H, CAN–L).

F19702

ECM

CANH

CANL

ENG+

ENG–

CANH

CANL

CANH

CANL

D6 DLC3

Translate ECU

Suspension Control ECU

33

E5

34

E5

L

W

1

J53

2

J53

Junction Connector

1

J54

2

J54

B

W

6

14

14
T5

16
T5

1

J55

2

J55

R

W

29

S25

28

S25

G

W

(*1)

(*1)

1

J56

2

J56

*1: w/ Air Suspension System

DI–1114

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

1308

Check for an Open in one Side of the CAN Sub Bus Line

CIRCUIT DESCRIPTION

If 2 or more ECUs and/or sensors do not appear on the hand–held tester’s ”BUS CHECK” screen via the
CAN VIM, one side of the CAN sub–bus line may be open. (One side of the CAN–H [sub–bus line] /CAN–L
[sub–bus line] of the ECU and/or sensor is open.)

Symptom

Trouble Area

2 or more ECUs and/or sensors do not appear on the hand–
held tester’s ”BUS CHECK” screen via the CAN VIM.

One side of the CAN sub–bus line is open

Suspension control ECU

ECM

Translate ECU

CAN J/C

WIRING DIAGRAM

DIDIG–01