Infiniti G35 (V35). Manual - part 579

LAN-76

[CAN]

TROUBLE DIAGNOSIS

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of driver seat control unit.

2.

Check the resistance between the driver seat control unit harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the driver seat control unit branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

SE-19, "Schematic"

  .

OK or NG

OK

>>

●

Present error: Replace the driver seat control unit. Refer to 

SE-17, "Component Parts and Har-

ness Connector Location"

  . 

●

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

NG

>> Repair the power supply and the ground circuit.

RAS Control Unit Branch Line Circuit

NKS004II

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 RAS control 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 RAS control unit.

2.

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

OK or NG

OK

>> GO TO 3.

NG

>> Repair the RAS control unit branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

STC-14, "Schematic"

  .

OK or NG

OK

>>

●

Present error: Replace the RAS control unit. Refer to 

STC-13, "Component Parts Location"

  .

●

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

NG

>> Repair the power supply and the ground circuit.

Driver seat control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

B352

3

19

Approx. 54 – 66

RAS control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

B136

1

8

Approx. 54 – 66

TROUBLE DIAGNOSIS

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[CAN]

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IPDM E/R Branch Line Circuit

NKS004IL

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).

–

IPDM E/R connector

–

Harness connector E123

–

Harness connector B41

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of IPDM E/R.

2.

Check the resistance between the IPDM E/R harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the IPDM E/R branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the IPDM E/R. Refer to 

PG-25, "IPDM E/R Power/Ground

Circuit Inspection"

  .

OK or NG

OK

>>

●

Present error: Replace the IPDM E/R. Refer to 

PG-27, "Removal and Installation of IPDM E/R"

.

●

Past error: Error was detected in the IPDM E/R branch line.

NG

>> Repair the power supply and the ground circuit.

CAN Communication Circuit

NKS004IM

INSPECTION PROCEDURE

1. 

CONNECTOR INSPECTION

1.

Turn the ignition switch OFF

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect all the unit connectors on CAN communication system.

4.

Check terminals and connectors for damage, bend and loose connection.

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

IPDM E/R harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E9

48

49

Approx. 108 – 132

LAN-78

[CAN]

TROUBLE DIAGNOSIS

2. 

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Check the harness and repair the root cause.

3. 

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

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

OK or NG

OK

>> GO TO 4.

NG

>> Check the harness and repair the root cause.

4. 

CHECK ECM AND IPDM E/R TERMINATION CIRCUIT

1.

Remove the ECM and the IPDM E/R.

2.

Check the resistance between the ECM terminals.

3.

Check the resistance between the IPDM E/R terminals.

OK or NG

OK

>> GO TO 5.

NG

>> Replace the ECM and/or the IPDM E/R.

5. 

CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results of interview with cus-
tomer)” are reproduced. 
Inspection result

Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

Data link connector

Continuity

Connector No.

Terminal No.

M8

6

14

No

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M8

6

No

14

No

ECM

Resistance (

Ω

)

Terminal No.

94

86

Approx. 108 – 132

IPDM E/R

Resistance (

Ω

)

Terminal No.

48

49

Approx. 108 – 132

LKIA0037E

TROUBLE DIAGNOSIS

LAN-79

[CAN]

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6. 

CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.

1.

Turn the ignition switch OFF

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect all the unit connectors on CAN communication system.

NOTE:
ECM and IPDM E/R have a termination circuit. Check other units first.

4.

Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced. 

NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms. 

Inspection result

Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace unit whose connector was disconnected.