Nissan Cube. Manual - part 646

LAN

BCM BRANCH LINE CIRCUIT

LAN-41

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

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BCM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000009949506

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).

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 BCM.

2.

Check the resistance between the BCM harness connector terminals.

-

Models with Intelligent Key system

-

Models without Intelligent Key system

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> 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 the following.
• Models with Intelligent Key system: 

BCS-44, "Diagnosis Procedure"

• Models without Intelligent Key system: 

BCS-123, "Diagnosis Procedure"

Is the inspection result normal?

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

• Models with Intelligent Key system: 

BCS-88, "Exploded View"

• Models without Intelligent Key system: 

BCS-155, "Exploded View"

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

>> Repair the power supply and the ground circuit.

BCM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M68

39

40

Approx. 108 – 132

BCM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M65

39

40

Approx. 108 – 132

LAN-42

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

CAN COMMUNICATION CIRCUIT

CAN COMMUNICATION CIRCUIT

Diagnosis Procedure

INFOID:0000000009949507

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.

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

Data link connector

Continuity

Connector No.

Terminal No.

M4

6

14

Not existed

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M4

6

Not existed

14

Not existed

1 :  ECM  or  BCM

ECM

Resistance (

Ω

)

Terminal No.

84

83

Approx. 108 – 132

BCM

Resistance (

Ω

)

Terminal No.

39

40

Approx. 108 – 132

JPMIA0933ZZ

LAN

CAN COMMUNICATION CIRCUIT

LAN-43

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

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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 one of the unit connectors of CAN communication system.
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-44

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

MAIN LINE BETWEEN IPDM-E AND DLC CIRCUIT

DTC/CIRCUIT DIAGNOSIS

MAIN LINE BETWEEN IPDM-E AND DLC CIRCUIT

Diagnosis Procedure

INFOID:0000000010243515

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 E105

-

Harness connector M77

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.

-

IPDM E/R

-

Harness connectors E105 and M77

2.

Check the continuity between the IPDM E/R harness connector and the harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the main line between the IPDM E/R and the harness connector E105.

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 IPDM E/R and the data link connector. 
NO

>> Repair the main line between the harness connector M77 and the data link connector.

IPDM E/R harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E13

27

E105

81

Existed

26

80

Existed

Harness connector

Data link connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M77

81

M4

6

Existed

80

14

Existed