Infiniti G35 (V35). Manual - part 577

LAN-68

[CAN]

TROUBLE DIAGNOSIS

Main Line Between TCM and Intelligent Key Unit

NKS004IA

INSPECTION PROCEDURE

1. 

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

–

Harness connector F102

–

Harness connector M72

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2. 

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the following harness connectors.

–

A/T assembly connector

–

Harness connector F102 and M72

2.

Check the continuity between the A/T assembly harness connector and the harness connector.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the main line between the A/T assembly and the harness connector F102.

3. 

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the connector of Intelligent Key unit.

2.

Check the continuity between the harness connector and the Intelligent Key unit harness connector.

OK or NG

OK

>>

●

Present error: Check the following items again.

–

Decision of CAN system type.

–

Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).

–

Procedure for detecting root cause.

●

Past error: Error was detected in the main line between the TCM and the Intelligent Key unit.

NG

>> Repair the main line between the harness connector M72 and the Intelligent Key unit.

A/T assembly harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

F40

3

F102

24H

Yes

8

25H

Yes

Harness connector

Intelligent Key unit harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M72

24H

M75

2

Yes

25H

3

Yes

TROUBLE DIAGNOSIS

LAN-69

[CAN]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

Main Line Between VDC/TCS/ABS Control Unit and Data Link Connector

NKS004OO

INSPECTION PROCEDURE

1. 

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect the following connectors.

–

VDC/TCS/ABS control unit.

–

ECM

4.

Check the continuity between the VDC/TCS/ABS control unit harness connector and the data link connec-
tor.

OK or NG

OK

>>

●

Present error: Check the following items again.

–

Decision of CAN system type.

–

Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).

–

Procedure for detecting root cause.

●

Past error: Error was detected in the main line between the VDC/TCS/ABS control unit and the
data link connector.

NG

>> Repair the main line between the VDC/TCS/ABS control unit and the data link connector.

Main Line Between Data Link Connector and Driver Seat Control Unit

NKS004OP

INSPECTION PROCEDURE

1. 

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

–

Harness connector M12

–

Harness connector B1

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2. 

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the harness connector M12 and B1.

2.

Check the continuity between the data link connector and the harness connector.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the main line between the data link connector and the harness connector M12.

VDC/TCS/ABS control unit harness connector

Data link connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M93

61

M8

6

Yes

63

14

Yes

Data link connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M8

6

M12

27J

Yes

14

26J

Yes

LAN-70

[CAN]

TROUBLE DIAGNOSIS

3. 

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the harness connector B7 and B351.

2.

Check the continuity between the harness connectors.

OK or NG

OK

>>

●

Present error: Check the following items again.

–

Decision of CAN system type.

–

Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).

–

Procedure for detecting root cause.

●

Past error: Error was detected in the main line between the data link connector and the driver
seat control unit.

NG

>> Repair the main line between the harness connector B1 and B7.

ECM Branch Line Circuit

NKS004IB

INSPECTION PROCEDURE

1. 

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the ECM for damage, bend and loose connection (unit side and
connector side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of ECM.

2.

Check the resistance between the ECM harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the ECM branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to 

EC-152, "POWER SUPPLY AND

GROUND CIRCUIT"

  .

OK or NG

OK

>>

●

Present error: Replace the ECM. Refer to 

EC-77, "Procedure After Replacing ECM"

  .

●

Past error: Error was detected in the ECM branch line.

NG

>> Repair the power supply and the ground circuit.

Harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

B1

27J

B7

3

Yes

26J

19

Yes

ECM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

F108

94

86

Approx. 108 – 132

TROUBLE DIAGNOSIS

LAN-71

[CAN]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

TCM Branch Line Circuit

NKS004OQ

INSPECTION PROCEDURE

1. 

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the A/T assembly for damage, bend and loose connection (unit
side and connector side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of A/T assembly.

2.

Check the resistance between the A/T assembly harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the TCM branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the TCM. Refer to 

AT-172, "MAIN POWER SUPPLY AND

GROUND CIRCUIT"

  .

OK or NG

OK

>>

●

Present error: Replace the control valve with TCM. Refer to 

AT-263, "Disassembly"

  .

●

Past error: Error was detected in the TCM branch line.

NG

>> Repair the power supply and the ground circuit.

VDC/TCS/ABS Control Unit Branch Line Circuit

NKS004IC

INSPECTION PROCEDURE

1. 

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the VDC/TCS/ABS control unit for damage, bend and loose con-
nection (unit side and connector side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

A/T assembly harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

F40

3

8

Approx. 54 – 66