Infiniti G35 (V35) Sedan. Manual — part 872
LAN
CAN COMMUNICATION CIRCUIT
LAN-157
< COMPONENT DIAGNOSIS >
[CAN SYSTEM (TYPE 7)]
C
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CAN COMMUNICATION CIRCUIT
Diagnosis Procedure
INFOID:0000000000964055
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 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.
Is the measurement value within the specification?
YES
>> GO TO 5.
NO
>> 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.
Data link connector
Continuity
Connector No.
Terminal No.
M24
6
14
Not existed
Data link connector
Ground
Continuity
Connector No.
Terminal No.
M24
6
Not existed
14
Not existed
ECM
Resistance (
Ω
)
Terminal No.
114
113
Approx. 108 – 132
IPDM E/R
Resistance (
Ω
)
Terminal No.
40
39
Approx. 108 – 132
LKIA0037E
LAN-158
< COMPONENT DIAGNOSIS >
[CAN SYSTEM (TYPE 7)]
CAN COMMUNICATION CIRCUIT
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 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.
LAN
MAIN LINE BETWEEN BCM AND DLC CIRCUIT
LAN-159
< COMPONENT DIAGNOSIS >
[CAN SYSTEM (TYPE 9)]
C
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COMPONENT DIAGNOSIS
MAIN LINE BETWEEN BCM AND DLC CIRCUIT
Diagnosis Procedure
INFOID:0000000000964056
INSPECTION PROCEDURE
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 harness connector
-
BCM harness connector
4.
Check the continuity between the BCM 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 BCM and the data link connector.
NO
>> Repair the main line between the BCM and the data link connector.
BCM harness connector
Data link connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
M122
91
M24
6
Existed
90
14
Existed
LAN-160
< COMPONENT DIAGNOSIS >
[CAN SYSTEM (TYPE 9)]
MAIN LINE BETWEEN DLC AND ADP CIRCUIT
MAIN LINE BETWEEN DLC AND ADP CIRCUIT
Diagnosis Procedure
INFOID:0000000000964057
INSPECTION PROCEDURE
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 M7
-
Harness connector B1
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair the terminal and connector.
2.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1.
Disconnect the harness connectors M7 and B1.
2.
Check the continuity between the data link connector and the harness connector.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair the main line between the data link connector and the harness connector M7.
3.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
Check the continuity between the harness connector terminals.
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 data link connector and the driver seat
control unit.
NO
>> Repair the main line between the harness connector B1 and the driver seat control unit.
Data link connector
Harness connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
M24
6
M7
23
Existed
14
24
Existed
Connector No.
Terminal No.
Continuity
B1
23
25
Existed
24
26
Existed
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