Toyota Sequoia (2005). Manual - part 320

DIDI7–01

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

DI–1075

1269

DIAGNOSTIC TROUBLE CODE CHART

1.

DTC TABLE BY ECU

HINT:

If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Per-
form troubleshooting according to ”HOW TO PROCEED WITH TROUBLESHOOTING” (see page 

DI–1065

).

(a)

Skid Control ECU

HINT:

DTC communication uses the SIL line.

If C1201/51, C1202/52 or C1203/53 is output from skid control ECU, perform troubleshooting of each
diagnosis code (see page 

DI–921

).

DTC No.

Detection Item

U0100/65

Lost Communication With ECM/PCM ”A”

(b)

ECM

HINT:
The ECM is connected to the CAN communication system, but CAN communication system DTCs are not
output.
(c)

Translate ECU

HINT:
The translate ECU outputs DTCs only via the BRAKE warning light. Therefore, the DTCs cannot be checked
on the hand–held tester display via the CAN VIM.

DTC No.

Detection Item

65

Abnormalities in EFI communication

94

Abnormalities in CAN communication

(d)

Suspension Control ECU

HINT:
DTC communication uses the SIL line.

DTC No.

Detection Item

U0100/65

Lost Communication With ECM/PCM ”A”

U0122/67

Lost Communication With Vehicle Dynamics Control Module

U0132/74

Lost Communication With Ride Level Control Module

DIDI8–01

F19697

Translate ECU

Junction Connector

ECM

ENG+

ENG–

14

T5

16

T5

1

J55

2

J55

R

W

1

J53

2

J53

33

E5

34

E5

W

L

CANH

CANL

Suspension Control ECU

CANH

CANL

29

S25

28

S25

G

W

(*1)

(*1)

1

J56

2

J56

1

J54

2

J54

W

B

6

14

D6 DLC3

CANH

CANL

Instrument Panel J/B

BAT

CG

W–R

13

1F

1

1L

W

W

8

5

B

16

4

O

A

A

O

J43
J/C

IG

ALT

F10
FL Block

Battery

*1: w/ Air Suspension System

OBD

1

2

DI–1076

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

1270

CIRCUIT INSPECTION

Check CAN Bus Line

CIRCUIT DESCRIPTION

When any DTC of the CAN communication system is output, first measure the resistance between the termi-
nals of the DLC3 and the suspension control ECU connector to specify the trouble area.

WIRING DIAGRAM

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

F19737

DLC3:

CANH

CANL

D6

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

DI–1077

1271

INSPECTION PROCEDURE

1

Check CAN bus line (Main bus line for disconnection, bus lines for short circuit).

PREPARATION:
Turn the ignition switch to the LOCK position.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester

connec-

tion

Condition

Specified

value

Result

D6–6

(CANH) –

D6–14

(CANL)

Ignition Switch OFF

54 to 69

Ω

OK

D6–6

(CANH) –

D6–14

(CANL)

Ignition Switch OFF

69 

Ω

 or

more

NG–A

D6–6

(CANH) –

D6–14

(CANL)

Ignition Switch OFF

54 

Ω

 or

less

NG–B

NG–A

Check CAN main bus line for disconnection
(See page 

DI–1086

).

NG–B

Check CAN bus lines for short circuit
(See page 

DI–1092

).

OK

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

F19737

DLC3:

CANH

CANL

D6

BAT

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

F19737

DLC3:

CANH

CANL

D6

CG

DI–1078

–

DIAGNOSTICS

CAN COMMUNICATION SYSTEM

1272

2

Check CAN bus line for short to +B.

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

Tester connection

Condition

Specified value

D6–6 (CANH) – 

D6–16 (BAT)

Ignition Switch OFF

1 M

Ω

 or more

D6–14 (CANL) – 

D6–16 (BAT)

Ignition Switch OFF

1 M

Ω

 or more

NG

Check CAN bus line for short to +B
(See page 

DI–1107

).

OK

3

Check CAN bus line for short to GND.

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

Tester connection

Condition

Specified value

D6–4 (CG) – 

D6–6 (CANH)

Ignition Switch OFF

3 k

Ω

 or more

D6–4 (CG) – 

D6–14 (CANL)

Ignition Switch OFF

3 k

Ω

 or more

NG

Check CAN bus line for short to GND
(See page 

DI–1100

).

OK

Go to ”How to proceed with troubleshooting”
(See page 

DI–1065

).