2011 INFINITI QX56 BATTERY

LAN
CAN COMMUNICATION CIRCUIT 1LAN-169
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
C
D
E
F
G H
I
J
K L
B A
O P
N
CAN COMMUNICAT
ION CIRCUIT 1
Diagnosis ProcedureINFOID:0000000006256313
1.CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect all the unit connectors on CAN communication circuit 1. NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication
circuit, refer to LAN-57, "
System Diagram".
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 CONTINUI TY (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 CONTINUI TY (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.
Data link connector
Continuity
Connector No. Terminal No.
M4 6 14 Not existed
Data link connector
GroundContinuity
Connector No. Terminal No.
M4 6 Not existed
14 Not existed
ECM Resistance (Ω)
Te r m i n a l N o .
146 151 Approx. 108 – 132
IPDM E/R Resistance (Ω)
Te r m i n a l N o .
27 26 Approx. 108 – 132
Revision: 2010 May2011 QX56

LAN-170
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
CAN COMMUNICATION CIRCUIT 1
5.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms descri bed 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 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.
Revision: 2010 May2011 QX56

LAN
CAN COMMUNICATION CIRCUIT 2LAN-171
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
C
D
E
F
G H
I
J
K L
B A
O P
N
CAN COMMUNICAT
ION CIRCUIT 2
Diagnosis ProcedureINFOID:0000000006256314
1.CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect all the unit connectors on CAN communication circuit 2. NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication
circuit, refer to LAN-57, "
System Diagram".
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 CONTINUI TY (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 CONTINUI TY (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 CAN GATEWAY TERMINATION CIRCUIT
1. Remove the CAN gateway.
2. Check the resistance between the CAN gateway terminals.
Is the measurement value within the specification?
YES >> GO TO 5.
NO >> Replace the CAN gateway.
5.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms descr ibed in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 6.
Data link connector Continuity
Connector No. Terminal No.
M4 13 12 Not existed
Data link connector
GroundContinuity
Connector No. Terminal No.
M4 13 Not existed
12 Not existed
CAN gateway
Resistance (Ω)
Te r m i n a l N o .
4 10 Approx. 108 – 132
6 12 Approx. 108 – 132
Revision: 2010 May2011 QX56

LAN-172
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
CAN COMMUNICATION CIRCUIT 2
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 2. NOTE:
CAN gateway 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.
Revision: 2010 May2011 QX56

LAN
ITS COMMUNICATION CIRCUITLAN-173
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
C
D
E
F
G H
I
J
K L
B A
O P
N
ITS COMMUNICATION CIRCUIT
Diagnosis ProcedureINFOID:0000000006256315
1.CHECK CAN DIAGNOSIS
Check the CAN diagnosis results from CONSULT-III to see that the CAN communication circuit 1 and CAN
communication circuit 2 have no malfunction.
NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication cir-
cuit, refer to LAN-57, "
System Diagram".
Are the CAN communication 1 and CAN communication 2 circuits normal?
YES >> GO TO 2.
NO >> Check and repair CAN communication circ uit 1 and/or CAN communication circuit 2.
2.CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con- nector side).
- ADAS control unit
- Harness connector B63
- Harness connector B239
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the terminal and connector.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- ADAS control unit
- ICC sensor
2. Check the continuity between the ADAS control unit harness connector and the ICC sensor harness con-
nector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the ADAS control unit branch li ne. (ITS communication circuit). Refer to LAN-57, "
System
Diagram".
4.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
1. Disconnect the following harness connectors.
- Side radar RH
- Side radar LH
- Lane camera unit
- Accelerator pedal actuator
2. Check the continuity between the ADAS control unit harness connector terminals.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Check the harness and repair the root cause.
ADAS control unit harness connector ICC sensor harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
B61 7
E65 3Existed
86Existed
ADAS control unit harness connector Continuity
Connector No. Terminal No.
B61 7 8 Not existed
Revision: 2010 May2011 QX56

LAN-174
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
ITS COMMUNICATION CIRCUIT
5.CHECK HARNESS CONTI
NUITY (SHORT CIRCUIT)
Check the continuity between the ADAS control unit harness connector and the ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Check the harness and repair the root cause.
6.CHECK TERMINATION CIRCUIT
1. Remove the ADAS control unit and the ICC sensor.
2. Check the resistance between the ADAS control unit terminals.
3. Check the resistance between the ICC sensor terminals.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace the ADAS control unit and/or the ICC sensor.
7.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms descri bed in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 8.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
8.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 ITS communication circuit. NOTE:
ADAS control unit and ICC sensor have a term ination 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.
ADAS control unit harness connector
GroundContinuity
Connector No. Terminal No.
B61 7 Not existed
8 Not existed
ADAS control unit
Resistance (Ω)
Te r m i n a l N o .
7 8 Approx. 108 – 132
ICC sensor Resistance (Ω)
Te r m i n a l N o .
3 6 Approx. 108 – 132
Revision: 2010 May2011 QX56

LAN
MAIN LINE BETWEEN ABS AND DLC CIRCUIT
LAN-175
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
C
D
E
F
G H
I
J
K L
B A
O P
N
DTC/CIRCUIT DIAGNOSIS
MAIN LINE BETWEEN ABS AND DLC CIRCUIT
Diagnosis ProcedureINFOID:0000000006256326
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).
- Harness connector E107
- Harness connector M82
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- ABS actuator and electric unit (control unit)
- Harness connectors E107 and M82
2. Check the continuity between the ABS actuator and electric unit (control unit) harness connector and the
harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the ABS actuat or and electric unit (control unit) and the harness
connector E107.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
Check the continuity between the harness connector and the data link connector.
Is the inspection result normal?
YES (Present error)>>Check CA N system type decision again.
YES (Past error)>>Error was detected in the main li ne between the ABS actuator and electric unit (control
unit) and the data link connector.
NO >> Repair the main line between the harness connector M82 and the data link connector.
ABS actuator and electric unit (control unit)
harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E36 41
E107 1 Existed
27 6 Existed
Harness connector Data link connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
M82 1
M4 6 Existed
6 14 Existed
Revision: 2010 May2011 QX56

LAN-176
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 3)]
MAIN LINE BETWEEN DLC AND E-SUS CIRCUIT
MAIN LINE BETWEEN DL
C AND E-SUS CIRCUIT
Diagnosis ProcedureINFOID:0000000006256327
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 M19
- Harness connector B2
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the harness connectors M19 and B2.
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 M19.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of air levelizer control module.
2. Check the continuity between the harness connector and the air levelizer control module harness connec-
tor.
Is the inspection result normal?
YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main li ne between the data link connector and the air levelizer
control module.
NO >> Repair the main line between the harness connector B2 and the air levelizer control module.
Data link connector Harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
M4 6
M19 29 Existed
14 30 Existed
Harness connector Air levelizer control module harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
B2 29
B84 16 Existed
30 7 Existed
Revision: 2010 May2011 QX56