Nissan Pathfinder (2007 year). Manual - part 294

TROUBLE DIAGNOSIS

LAN-83

[CAN]

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LAN

2007 Pathfinder

BCM Branch Line Circuit

UKS006I7

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.

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-16, "BCM Power Supply and Ground

Circuit Check"

 .

OK or NG

OK

>>

●

Present error: Replace the BCM. Refer to 

BCS-25, "Removal and Installation"

 . 

●

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

NG

>> Repair the power supply and the ground circuit.

Data Link Connector Branch Line Circuit

UKS006I9

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

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

BCM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M18

39

40

Approx. 54 – 66

LAN-84

[CAN]

TROUBLE DIAGNOSIS

2007 Pathfinder

2. 

CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

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).

–

Not copied from on-board diagnosis.

–

Procedure for detecting root cause.

●

Past error: Error was detected in the data link connector branch line circuit.

NG

>> Repair the data link connector branch line.

Front Air Control Branch Line Circuit

UKS006I8

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 front air control 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 front air control.

2.

Check the resistance between the front air control harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the front air control branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the front air control. Refer to 

ATC-55, "Power Supply and

Ground Circuit for Front Air Control"

 .

OK or NG

OK

>>

●

Present error: Replace the front air control. Refer to 

ATC-131, "Removal and Installation"

 .

●

Past error: Error was detected in the front air control branch line.

NG

>> Repair the power supply and the ground circuit.

Data link connector

Resistance (

Ω

)

Connector No.

Terminal No.

M22

6

14

Approx. 54 – 66

Front air control harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M50

41

42

Approx. 54 – 66

TROUBLE DIAGNOSIS

LAN-85

[CAN]

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2007 Pathfinder

Combination Meter Branch Line Circuit

UKS006IA

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 combination meter 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 combination meter.

2.

Check the resistance between the combination meter harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the combination meter branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

DI-18, "Power Supply and

Ground Circuit Inspection"

 .

OK or NG

OK

>>

●

Present error: Replace the combination meter. Refer to 

DI-23, "Removal and Installation"

 .

●

Past error: Error was detected in the combination meter branch line.

NG

>> Repair the power supply and the ground circuit.

Steering Angle Sensor Branch Line Circuit

UKS006IB

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 steering angle sensor for damage, bend and loose connection
(unit side and connector side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

Combination meter harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M24

12

11

Approx. 54 – 66

LAN-86

[CAN]

TROUBLE DIAGNOSIS

2007 Pathfinder

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of steering angle sensor.

2.

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

OK or NG

OK

>> GO TO 3.

NG

>> Repair the steering angle sensor branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

BRC-16, "Schematic"

(VDC/TCS/ABS) or 

BRC-78, "Schematic"

  (HDC/HSA/VDC/TCS/ABS).

OK or NG

OK

>>

●

Present error: Replace the steering angle sensor. Refer to 

BRC-63, "Removal and Installation"

(VDC/TCS/ABS) or 

BRC-132, "Removal and Installation"

  (HDC/HSA/VDC/TCS/ABS).

●

Past error: Error was detected in the steering angle sensor branch line.

NG

>> Repair the power supply and the ground circuit.

Display Control Unit Branch Line Circuit

UKS006IM

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 display 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 display control unit.

2.

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

OK or NG

OK

>> GO TO 3.

NG

>> Repair the display control unit branch line.

3. 

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

AV-117, "Power Supply and

Ground Circuit Check for Display Control Unit"

 .

OK or NG

OK

>>

●

Present error: Replace the display control unit. Refer to 

AV-153, "DISPLAY CONTROL UNIT"

 .

●

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

NG

>> Repair the power supply and the ground circuit.

Steering angle sensor harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M47

4

5

Approx. 54 – 66

Display control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M95

25

26

Approx. 54 – 66

TROUBLE DIAGNOSIS

LAN-87

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2007 Pathfinder

ABS Actuator and Electric Unit (Control Unit) Branch Line Circuit

UKS006IC

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 ABS actuator and electric unit (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 ABS actuator and electric unit (control unit).

2.

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

OK or NG

OK

>> GO TO 3.

NG

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

3. 

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-16, "Schematic"

  (VDC/TCS/ABS) or 

BRC-78, "Schematic"

  (HDC/HSA/VDC/TCS/ABS).

OK or NG

OK

>>

●

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

BRC-61,

"Removal and Installation"

  (VDC/TCS/ABS) or 

BRC-130, "Removal and Installation"

  (HDC/

HSA/VDC/TCS/ABS). 

●

Past error: Error was detected in the ABS actuator and electric unit (control unit) branch line.

NG

>> Repair the power supply and the ground circuit.

IPDM E/R Branch Line Circuit

UKS006ID

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 IPDM E/R for damage, bend and loose connection (unit side
and connector side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

ABS actuator and electric unit (control unit) harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E125

11

15

Approx. 54 – 66

LAN-88

[CAN]

TROUBLE DIAGNOSIS

2007 Pathfinder

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-29, "IPDM E/R Power/Ground

Circuit Inspection"

 .

OK or NG

OK

>>

●

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

PG-32, "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

UKS006IE

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.

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.

IPDM E/R harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E122

39

40

Approx. 108 – 132

Data link connector

Continuity

Connector No.

Terminal No.

M22

6

14

No

TROUBLE DIAGNOSIS

LAN-89

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2007 Pathfinder

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 from interview with
customer)” are reproduced. 

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 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 the unit whose connector was disconnected.

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M22

6

No

14

No

ECM

Resistance (

Ω

)

Terminal No.

94

86

Approx. 108 – 132

IPDM E/R

Resistance (

Ω

)

Terminal No.

39

40

Approx. 108 – 132

LKIA0037E

LAN-90

[CAN]

TROUBLE DIAGNOSIS

2007 Pathfinder