Infiniti M35/M45 Y50. Manual - part 861

TROUBLE DIAGNOSIS

LAN-93

[CAN]

C

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TCM Branch Line Circuit

NKS004GK

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 (unit side and con-
nector side).

–

A/T assembly connector

–

Harness connector F102

–

Harness connector M72

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-180, "MAIN POWER SUPPLY AND

GROUND CIRCUIT"

 .

OK or NG

OK

>>

●

Present error: Replace the control valve with TCM.

●

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

NG

>> Repair the power supply and the ground circuit.

NAVI Control Unit Branch Line Circuit

NKS004GI

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 (unit side and con-
nector side).

–

NAVI control unit connector

–

Harness connector M216

–

Harness connector M53

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

A/T assembly harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

F42

3

8

Approx. 54 – 66

LAN-94

[CAN]

TROUBLE DIAGNOSIS

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of NAVI control unit.

2.

Check the resistance between the NAVI control unit harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the NAVI control unit branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply, ignition signal and the ground circuit of the NAVI control unit. Refer to 

AV-171, "Sche-

matic — BOSE Surround Audio 5.1ch System —"

 .

OK or NG

OK

>>

●

Present error: Replace the NAVI control unit. Refer to 

AV-282, "AV (NAVI) Control Unit"

 .

●

Past error: Error was detected in the NAVI control unit branch line.

NG

>> Repair the power supply and the ground circuit.

AV Control Unit Branch Line Circuit

NKS004HO

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 (unit side and con-
nector side).

–

AV control unit connector

–

Harness connector M216

–

Harness connector M53

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of AV control unit.

2.

Check the resistance between the AV control unit harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the AV control unit branch line.

NAVI control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M210

71

72

Approx. 54 – 66

AV control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M210

71

72

Approx. 54 – 66

TROUBLE DIAGNOSIS

LAN-95

[CAN]

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LAN

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply, ignition signal and the ground circuit of the AV control unit. Refer to 

AV-42, "Sche-

matic — BOSE Surround Audio 5.1ch System —"

 .

OK or NG

OK

>>

●

Present error: Replace the AV control unit. Refer to 

AV-131, "AV (NAVI) Control Unit"

 .

●

Past error: Error was detected in the AV control unit branch line.

NG

>> Repair the power supply and the ground circuit.

Data Link Connector Branch Line Circuit

NKS004GE

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 data link connector for damage, bend and loose connection (con-
nector side and harness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

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 data link connector branch line circuit.

NG

>> Repair the data link connector branch line.

Intelligent Key Unit Branch Line Circuit

NKS004GF

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 Intelligent Key unit for damage, bend and loose connection
(unit side and connector side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

Data link connector

Resistance (

Ω

)

Connector No.

Terminal No.

M60

6

14

Approx. 54 – 66

LAN-96

[CAN]

TROUBLE DIAGNOSIS

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of Intelligent Key unit.

2.

Check the resistance between the Intelligent Key unit harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the Intelligent Key unit branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the Intelligent Key unit. Refer to 

BL-91, "Check Power Sup-

ply and Ground Circuit"

 .

OK or NG

OK

>>

●

Present error: Replace the Intelligent Key unit. Refer to 

BL-123, "Removal and Installation of

Intelligent Key Unit"

 .

●

Past error: Error was detected in the Intelligent Key unit branch line.

NG

>> Repair the power supply and the ground circuit.

Unified Meter and A/C Amp. Branch Line Circuit

NKS004GG

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 unified meter and A/C amp. 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.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of unified meter and A/C amp.

2.

Check the resistance between the unified meter and A/C amp. harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the unified meter and A/C amp. branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the unified meter and A/C amp. Refer to 

DI-34, "Power Sup-

ply and Ground Circuit Inspection"

 .

OK or NG

OK

>>

●

Present error: Replace the unified meter and A/C amp. Refer to 

DI-38, "Removal and Installa-

tion of Unified Meter and A/C Amp."

 .

●

Past error: Error was detected in the unified meter and A/C amp. branch line.

NG

>> Repair the power supply and the ground circuit.

Intelligent Key unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M32

38

37

Approx. 54 – 66

Unified meter and A/C amp. harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M65

56

72

Approx. 54 – 66