Infiniti FX35, FX50 (S51). Manual - part 1293

LAN-114

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

MAIN LINE BETWEEN M&A AND ABS CIRCUIT

MAIN LINE BETWEEN M&A AND ABS CIRCUIT

Diagnosis Procedure

INFOID:0000000005576880

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 M6

-

Harness connector E106

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the following harness connectors.

-

Unified meter and A/C amp.

-

Harness connectors M6 and E106

2.

Check the continuity between the unified meter and A/C amp. harness connector and the harness con-
nector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the main line between the unified meter and A/C amp. and the harness connector M6.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the connector of ABS actuator and electric unit (control unit).

2.

Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)
harness connector.

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the unified meter and A/C amp. and the ABS

actuator and electric unit (control unit). 

NO

>> Repair the main line between the harness connector E106 and the ABS actuator and electric unit

(control unit).

Unified meter and A/C amp. harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M67

56

M6

47

Existed

72

48

Existed

Harness connector

ABS actuator and electric unit (control unit)

harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E106

47

E41

35

Existed

48

14

Existed

LAN

ECM BRANCH LINE CIRCUIT

LAN-115

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

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ECM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000005576882

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).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> 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.

-

VQ engine models

-

VK engine models

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> 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 the following.
• VQ engine models: 

EC-142, "Diagnosis Procedure"

• VK engine models: 

EC-736, "Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the ECM. Refer to the following.

• VQ engine models: 

EC-23, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT :

Special Repair Requirement"

• VK engine models: 

EC-579, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT

(ECM) : Special Repair Requirement"

YES (Past error)>>Error was detected in the ECM branch line.
NO

>> Repair the power supply and the ground circuit.

ECM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M107

114

113

Approx. 108 – 132

ECM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M160

105

101

Approx. 108 – 132

LAN-116

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

DLC BRANCH LINE CIRCUIT

DLC BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000005576884

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

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

Is the measurement value within the specification?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the data link connector branch line circuit.
NO

>> Repair the data link connector branch line.

Data link connector

Resistance (

Ω

)

Connector No.

Terminal No.

M24

6

14

Approx. 54 – 66

LAN

TCM BRANCH LINE CIRCUIT

LAN-117

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

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TCM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000005576885

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

-

Harness connector F103

-

Harness connector M116

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> 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.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> 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 the following.
• VQ engine models: 

TM-119, "Diagnosis Procedure"

• VK engine models: 

TM-301, "Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the control valve with TCM. (Replace A/T assembly if control valve with TCM

is not listed in the latest parts list.) Refer to the following.

• VQ engine models: 

TM-11, "Component Parts Location"

• VK engine models: 

TM-193, "Component Parts Location"

YES (Past error)>>Error was detected in the TCM branch line.
NO

>> Repair the power supply and the ground circuit.

A/T assembly harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

F51

3

8

Approx. 54 – 66