Nissan Altima L32. Instruction — part 910
LAN
CAN COMMUNICATION CIRCUIT
LAN-169
< COMPONENT DIAGNOSIS >
[CAN SYSTEM (TYPE 11)]
C
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F
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B
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CAN COMMUNICATION CIRCUIT
Diagnosis Procedure
INFOID:0000000004203993
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.
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
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.
98
97
Approx. 108 – 132
IPDM E/R
Resistance (
Ω)
Terminal No.
40
39
Approx. 108 – 132
LKIA0037E
LAN-170
< COMPONENT DIAGNOSIS >
[CAN SYSTEM (TYPE 11)]
CAN COMMUNICATION CIRCUIT
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 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 DLC AND ABS CIRCUIT
LAN-171
< COMPONENT DIAGNOSIS >
[CAN SYSTEM (TYPE 12)]
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COMPONENT DIAGNOSIS
MAIN LINE BETWEEN DLC AND ABS CIRCUIT
Diagnosis Procedure
INFOID:0000000004203994
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 M1
-
Harness connector E30
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 M1 and E30.
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 M1.
3.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of ABS actuator and electric unit (control unit).
2. Check the continuity between the 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 data link connector and the ABS actuator
and electric unit (control unit).
NO
>> Repair the main line between the harness connector E30 and the ABS actuator and electric unit
(control unit).
Data link connector
Harness connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
M22
6
M1
15G
Existed
14
8G
Existed
Harness connector
ABS actuator and electric unit (control unit)
harness connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
E30
15G
E26
26
Existed
8G
15
Existed
LAN-172
< COMPONENT DIAGNOSIS >
[CAN SYSTEM (TYPE 12)]
ECM BRANCH LINE CIRCUIT
ECM BRANCH LINE CIRCUIT
Diagnosis Procedure
INFOID:0000000004471825
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 (unit side and con-
nector side).
-
ECM
-
Harness connector E30
-
Harness connector M1
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 ECM.
2. Check the resistance between the ECM harness connector terminals.
Is the measurement value within the specification?
YES
>> GO TO 3.
NO
>> Repair the ECM branch line.
3.
CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to the following.
• QR engine models for California:
• QR engine models expect for California:
• VQ engine models:
EC-1175, "Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the ECM. Refer to the following.
• QR engine models for California:
EC-27, "ADDITIONAL SERVICE WHEN REPLACING CON-
TROL UNIT : Special Repair Requirement"
• QR engine models except for California:
EC-563, "ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement"
• VQ engine models:
EC-1051, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT :
YES (Past error)>>Error was detected in the ECM branch line.
NO
>> Repair the power supply and the ground circuit.
ECM harness connector
Resistance (
Ω)
Connector No.
Terminal No.
E10
98
97
Approx. 108 – 132
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