Infiniti M35/M45 Y50. Manual - part 860

TROUBLE DIAGNOSIS

LAN-89

[CAN]

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LAN

Main Line Between ABS Actuator and Electric Unit (Control Unit) and ICC Sen-
sor Integrated Unit

NKS004H0

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 harness connectors.

–

ABS actuator and electric unit (control unit) harness connector

–

ICC sensor integrated unit harness connector

–

IPDM E/R harness connector

4.

Check continuity between the ABS actuator and electric unit (control unit) harness connector and the ICC
sensor integrated 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 ABS actuator and electric unit (con-
trol unit) and the ICC sensor integrated unit.

NG

>> Repair the main line between the ABS actuator and electric unit (control unit) and the ICC sensor

integrated unit.

ECM Branch Line Circuit

NKS004GA

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.

ABS actuator and electric unit (control unit)

harness connector

ICC sensor integrated unit

harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E30

35

E61

3

Yes

14

6

Yes

ECM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M71

94

86

Approx. 108 – 132

LAN-90

[CAN]

TROUBLE DIAGNOSIS

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

EC-154, "POWER SUPPLY AND

GROUND CIRCUIT"

  (VQ engine), 

EC-858, "POWER SUPPLY AND GROUND CIRCUIT"

  (VK engine).

OK or NG

OK

>>

●

Present error: Replace the ECM. Refer to 

EC-85, "Procedure After Replacing ECM"

  (VQ

engine), 

EC-787, "Procedure After Replacing ECM"

  (VK engine).

●

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

NG

>> Repair the power supply and the ground circuit.

AWD Control Unit Branch Line Circuit

NKS004GL

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).

–

AWD control unit 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 AWD control unit.

2.

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

OK or NG

OK

>> GO TO 3.

NG

>> Repair the AWD control unit branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the AWD control unit. Refer to 

TF-16, "Circuit Diagram"

 .

OK or NG

OK

>>

●

Present error: Replace the AWD control unit. Refer to 

TF-39, "Removal and Installation"

 .

●

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

NG

>> Repair the power supply and the ground circuit.

AWD control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

F109

8

16

Approx. 54 – 66

TROUBLE DIAGNOSIS

LAN-91

[CAN]

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LAN

AFS Control Unit Branch Line Circuit

NKS004H1

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).

–

AFS control unit 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 AFS control unit.

2.

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

OK or NG

OK

>> GO TO 3.

NG

>> Repair the AFS control unit branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the AFS control unit. Refer to 

LT-142, "Schematic"

 .

OK or NG

OK

>>

●

Present error: Replace the AFS control unit. Refer to 

LT-192, "Removal and Installation of AFS

Control Unit"

 .

●

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

NG

>> Repair the power supply and the ground circuit.

BCM Branch Line Circuit

NKS004GD

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

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

AFS control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

F110

30

7

Approx. 54 – 66

LAN-92

[CAN]

TROUBLE DIAGNOSIS

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of BCM.

2.

Check the resistance between the BCM harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the BCM branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

BCS-14, "Check BCM Power Supply and

Ground Circuit"

 .

OK or NG

OK

>>

●

Present error: Replace the BCM. Refer to 

BCS-15, "Removal and Installation of BCM"

 .

●

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

NG

>> Repair the power supply and the ground circuit.

LDW Camera Unit Branch Line Circuit

NKS004H2

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 LDW camera 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.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of LDW camera unit.

2.

Check the resistance between the LDW camera unit harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the LDW camera unit branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the LDW camera unit. Refer to 

DI-93, "Power Supply and

Ground Circuit Inspection"

 .

OK or NG

OK

>>

●

Present error: Replace the LDW camera unit. Refer to 

DI-100, "Removal and Installation for

LDW Camera Unit"

 .

●

Past error: Error was detected in the LDW camera unit branch line.

NG

>> Repair the power supply and the ground circuit.

BCM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M1

39

40

Approx. 54 – 66

LDW camera unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M182

10

5

Approx. 54 – 66