Nissan Pathfinder. Manual - part 818

LAN

CAN COMMUNICATION CIRCUIT

LAN-225

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 6)]

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CAN COMMUNICATION CIRCUIT

Diagnosis Procedure

INFOID:0000000009175113

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 circuit.

4. Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> 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.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Check the harness and repair the root cause.

4.

CHECK ECM AND BCM TERMINATION CIRCUIT

1. Remove the ECM and the BCM.

2. Check the resistance between the ECM terminals.

3. Check the resistance between the BCM terminals.

Is the measurement value within the specification?

YES

>> GO TO 5.

NO

>> Replace the ECM and/or the BCM.

5.

CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with

customer)” are reproduced. 

Data link connector

Continuity

Connector No.

Terminal No.

M22

6

14

Not existed

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M22

6

Not existed

14

Not existed

ECM

Resistance (

Ω)

Terminal No.

114

113

Approx. 108 – 132

BCM

Resistance (

Ω)

Terminal No.

60

59

Approx. 108 – 132

LAN-226

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 6)]

CAN COMMUNICATION CIRCUIT

Inspection result

Reproduced>>GO TO 6.

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

detected.

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 one of the unit connectors of CAN communication circuit.

NOTE:

ECM and BCM 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 the unit whose connector was disconnected.

LAN

MAIN LINE BETWEEN IPDM-E AND ABS CIRCUIT

LAN-227

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 7)]

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DTC/CIRCUIT DIAGNOSIS

MAIN LINE BETWEEN IPDM-E AND ABS CIRCUIT

Diagnosis Procedure

INFOID:0000000009175114

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.

-

ECM

-

IPDM E/R

-

ABS actuator and electric unit (control unit)

4. Check the continuity between the IPDM E/R 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 IPDM E/R and the ABS actuator and

electric unit (control unit). 

NO

>> Repair the main line between the IPDM E/R and the ABS actuator and electric unit (control unit).

IPDM E/R harness connector

ABS actuator and electric unit (control unit) 

harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E119

29

E125

25

Existed

28

15

Existed

LAN-228

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 7)]

MAIN LINE BETWEEN ABS AND DLC CIRCUIT

MAIN LINE BETWEEN ABS AND DLC CIRCUIT

Diagnosis Procedure

INFOID:0000000009175115

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 E152

-

Harness connector M31

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.

-

ABS actuator and electric unit (control unit)

-

Harness connectors E152 and M31.

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

harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

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

connector E152.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Check the continuity between the harness connector and the data link 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 ABS actuator and electric unit (control

unit) and the data link connector. 

NO

>> Repair the main line between the harness connector M31 and the data link connector.

ABS actuator and electric unit (control unit) harness 

connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E125

25

E152

36G

Existed

15

35G

Existed

Harness connector

Data link connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M31

36G

M22

6

Existed

35G

14

Existed