Nissan Pathfinder (2008 year). Manual — part 479

LAN

HVAC BRANCH LINE CIRCUIT

LAN-87

< COMPONENT DIAGNOSIS >

[CAN]

HVAC BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001316407

CHECK CONNECTOR

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Check the terminals and connectors of the A/C auto amp. for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of A/C auto amp.

Check the resistance between the A/C auto amp. harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

>> Repair the A/C auto amp. branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the A/C auto amp. Refer to the following.
• Models with automatic air conditioner:

HAC-88, "A/C Auto Amp Power and Ground Diagnosis Procedure"

• Models with manual air conditioner:

HAC-160, "Front Air Control Power and Ground Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the front air control. Refer to

VTL-8, "Removal and Installation"

YES (Past error)>>Error was detected in the A/C auto amp. branch line.
NO

>> Repair the power supply and the ground circuit.

A/C auto amp. harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M50

Approx. 54 – 66

LAN-88

< COMPONENT DIAGNOSIS >

[CAN]

M&A BRANCH LINE CIRCUIT

M&A BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001316409

INSPECTION PROCEDURE

CHECK CONNECTOR

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Check the terminals and connectors of the combination meter for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of combination meter.

Check the resistance between the combination meter harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

>> Repair the combination meter branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the combination meter. Refer to

MWI-29, "COMBINATION

METER : Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the combination meter. Refer to

MWI-94, "Removal and Installation"

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

>> Repair the power supply and the ground circuit.

Combination meter harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M24

Approx. 54 – 66

LAN

STRG BRANCH LINE CIRCUIT

LAN-89

< COMPONENT DIAGNOSIS >

[CAN]

STRG BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001316410

INSPECTION PROCEDURE

CHECK CONNECTOR

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Check the terminals and connectors of the steering angle sensor for damage, bend and loose connection
(unit side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of steering angle sensor.

Check the resistance between the steering angle sensor harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

>> Repair the steering angle sensor branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the steering angle sensor. Refer to

BRC-32, "Diagnosis Pro-

cedure"

Is the inspection result normal?

YES (Present error)>>Replace the steering angle sensor. Refer to

BRC-125, "Removal and Installation"

YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO

>> Repair the power supply and the ground circuit.

Steering angle sensor harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M47

Approx. 54 – 66

LAN-90

< COMPONENT DIAGNOSIS >

[CAN]

ABS BRANCH LINE CIRCUIT

ABS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001316412

CHECK CONNECTOR

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Check the terminals and connectors of the ABS actuator and electric unit (control unit) for damage, bend
and loose connection (unit side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

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

Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi-
nals.

Is the measurement value within the specification?

YES

>> GO TO 3.

>> Repair the ABS actuator and electric unit (control unit) branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to

BRC-32, "Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to

BRC-123, "Removal

and Installation"

YES (Past error)>>Error was detected in the ABS actuator and electric unit (control unit) branch line.
NO

>> Repair the power supply and the ground circuit.

ABS actuator and electric unit (control unit) harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E125

Approx. 54 – 66

LAN

IPDM-E BRANCH LINE CIRCUIT

LAN-91

< COMPONENT DIAGNOSIS >

[CAN]

IPDM-E BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001316413

INSPECTION PROCEDURE

CHECK CONNECTOR

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Check the terminals and connectors of the IPDM E/R for damage, bend and loose connection (unit side
and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of IPDM E/R.

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

Is the measurement value within the specification?

YES

>> GO TO 3.

>> Repair the IPDM E/R branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

PCS-16, "Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the IPDM E/R. Refer to

PCS-30, "Removal and Installation of IPDM E/R"

YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO

>> Repair the power supply and the ground circuit.

IPDM E/R harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E122

Approx. 108 – 132

LAN-92

< COMPONENT DIAGNOSIS >

[CAN]

CAN COMMUNICATION CIRCUIT

CAN COMMUNICATION CIRCUIT

Diagnosis Procedure

INFOID:0000000001316414

CONNECTOR INSPECTION

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Disconnect all the unit connectors on CAN communication system.

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

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the terminal and connector.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

>> Check the harness and repair the root cause.

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.

>> Check the harness and repair the root cause.

CHECK ECM AND IPDM E/R TERMINATION CIRCUIT

Remove the ECM and the IPDM E/R.

Check the resistance between the ECM terminals.

Check the resistance between the IPDM E/R terminals.

Is the measurement value within the specification?

YES

>> GO TO 5.

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

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

Not existed

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M22

Not existed

ECM

Resistance (

Ω

)

Terminal No.

Approx. 108 – 132

IPDM E/R

Resistance (

Ω

)

Terminal No.

Approx. 108 – 132

LKIA0037E

LAN

CAN COMMUNICATION CIRCUIT

LAN-93

< COMPONENT DIAGNOSIS >

[CAN]

Inspection result

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

detected.

CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.
1.

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Disconnect one of the unit connectors of CAN communication system.
NOTE:
ECM and IPDM E/R have a termination circuit. Check other units first.

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.