Nissan Pathfinder. Manual — part 813
LAN
BCM BRANCH LINE CIRCUIT
LAN-205
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 5)]
C
D
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BCM BRANCH LINE CIRCUIT
Diagnosis Procedure
INFOID:0000000009175094
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 (unit side and con-
nector side).
-
BCM
-
Harness connector M84 (Models without around view monitor)
-
Harness connector B101 (Models without around view monitor)
-
Harness connector B124 (Models without around view monitor)
-
Harness connector B32 (Models without around view monitor)
-
Harness connector B69 (2WD models without automatic back door system)
-
Harness connector M40 (2WD models without automatic back door system)
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.
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
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to
BCS-80, "Removal and Installation"
.
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.
M19
60
59
Approx. 108 – 132
LAN-206
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 5)]
CAN COMMUNICATION CIRCUIT
CAN COMMUNICATION CIRCUIT
Diagnosis Procedure
INFOID:0000000009175095
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
CAN COMMUNICATION CIRCUIT
LAN-207
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 5)]
C
D
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F
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B
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N
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-208
< DTC/CIRCUIT DIAGNOSIS >
[CAN SYSTEM (TYPE 6)]
MAIN LINE BETWEEN IPDM-E AND ABS CIRCUIT
DTC/CIRCUIT DIAGNOSIS
MAIN LINE BETWEEN IPDM-E AND ABS CIRCUIT
Diagnosis Procedure
INFOID:0000000009175096
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
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