Nissan Qashqai J11. Manual - part 1878

LAN

CAN COMMUNICATION CIRCUIT 1

LAN-105

< DTC/CIRCUIT DIAGNOSIS >

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CAN COMMUNICATION CIRCUIT 1

Diagnosis Procedure

INFOID:0000000010339749

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 1.

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 or replace 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 or replace 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.

-

MR20DD engine models

-

MR16DDT engine models

-

Except for MR engine models

Data link connector

Continuity

Connector No.

Terminal No.

M21

6

14

Not existed

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M21

6

Not existed

14

Not existed

ECM

Resistance (

Ω

)

Terminal No.

100

99

Approx. 108 – 132

ECM

Resistance (

Ω

)

Terminal No.

124

123

Approx. 108 – 132

ECM

Resistance (

Ω

)

Terminal No.

1

2

Approx. 108 – 132

LAN-106

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

CAN COMMUNICATION CIRCUIT 1

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. 

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 1.
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.

BCM

Resistance (

Ω

)

Terminal No.

20

40

Approx. 108 – 132

LAN

CAN COMMUNICATION CIRCUIT 2

LAN-107

< DTC/CIRCUIT DIAGNOSIS >

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CAN COMMUNICATION CIRCUIT 2

Diagnosis Procedure

INFOID:0000000010339750

1.

CHECK CAN DIAGNOSIS

Check the CAN diagnosis results from CONSULT to see that the CAN communication circuit 1 have no mal-
function.

Is the CAN communication 1 circuits normal?

YES

>> GO TO 2.

NO

>> Check and repair CAN communication circuit 1.

2.

CHECK DTC

Check DTC of the CAN gateway with CONSULT.

Is B2600-46 or B2600-55 indicated?

YES

>> Perform a diagnosis of the indicated DTC.

NO

>> GO TO 3.

3.

CONNECTOR INSPECTION

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 4.

NO

>> Repair the terminal and connector.

4.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the connector of BCM.

2.

Check the continuity between the BCM harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Check the harness and repair or replace the root cause.

5.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

1.

Disconnect all the unit connectors on CAN communication circuit 2.

2.

Check the continuity between the BCM harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Check the harness and repair or replace the root cause.

6.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the BCM and the ground.

BCM harness connector

Continuity

Connector No.

Terminal No.

M70

46

48

Existed

45

49

Existed

BCM harness connector

Continuity

Connector No.

Terminal No.

M70

46

45

Not existed

LAN-108

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

CAN COMMUNICATION CIRCUIT 2

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Check the harness and repair or replace (if shield line is short) the root cause.

7.

CHECK BCM TERMINATION CIRCUIT

1.

Remove the BCM.

2.

Check the resistance between the BCM terminals.

Is the measurement value within the specification?

YES

>> GO TO 8.

NO

>> Replace the chassis control module.

8.

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 9.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

9.

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 2.
NOTE:
BCM has two termination circuits. 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.

BCM harness connector

Ground

Continuity

Connector No.

Terminal No.

M70

46

Not existed

45

Not existed

BCM

Resistance (

Ω

)

Terminal No.

46

45

Approx. 108 – 132

48

49

Approx. 108 – 132