2011 INFINITI QX56 diagram

LAN-96
< DTC/CIRCUIT DIAGNOSIS >[CAN]
CAN COMMUNICATION CIRCUIT 1
CAN COMMUNICATION CIRCUIT 1
Diagnosis ProcedureINFOID:0000000006220570
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. 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 CONTI NUITY (SHORT CIRCUIT)
Check the continuity between t he 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 CONTI NUITY (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-98
< DTC/CIRCUIT DIAGNOSIS >[CAN]
CAN COMMUNICATION CIRCUIT 2
CAN COMMUNICATION CIRCUIT 2
Diagnosis ProcedureINFOID:0000000006220571
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 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 CONTI NUITY (SHORT CIRCUIT)
Check the continuity between t he 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 CONTI NUITY (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 descri bed 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-100
< DTC/CIRCUIT DIAGNOSIS >[CAN]
ITS COMMUNICATION CIRCUIT
ITS COMMUNICATION CIRCUIT
Diagnosis ProcedureINFOID:0000000006220572
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 circuit 1 and/or CAN communication circuit 2.
2.CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors fo r 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 line. (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 3 Existed
86Existed
ADAS control unit harness connector Continuity
Connector No. Terminal No.
B61 7 8 Not existed
Revision: 2010 May2011 QX56

LAN-108
< WIRING DIAGRAM >[CAN GATEWAY]
CAN GATEWAY SYSTEM
WIRING DIAGRAM
CAN GATEWAY SYSTEM
Wiring DiagramINFOID:0000000006220580
JCMWM8323GB
Revision: 2010 May2011 QX56

LAN
CAN GATEWAY SYSTEMLAN-109
< WIRING DIAGRAM > [CAN GATEWAY]
C
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G H
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K L
B A
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JCMWM8324GB
Revision: 2010 May2011 QX56

LAN
ADP BRANCH LINE CIRCUITLAN-133
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
C
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G H
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B A
O P
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ADP BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256256
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 (unit side and con- nector side).
- Driver seat control unit
- Harness connector B460
- Harness connector B24
- CAN gateway (With ICC system)
Is the inspection result normal?
YES (With ICC system)>>GO TO 2.
YES (Without ICC system)>>GO TO 3.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of CAN gateway.
2. Check the continuity between the CAN gateway harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause (CAN communication circuit 2). Refer to LAN-57,
"System Diagram".
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Connect the connector of CAN gateway. (With ICC system)
2. Disconnect the connector of driver seat control unit.
3. Check the resistance between the driver s eat control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the driver seat control unit branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the driver seat control unit. Refer to ADP-67, "
DRIVER SEAT
CONTROL UNIT : DiagnosisProcedure".
Is the inspection result normal?
YES (Present error)>>Replace the driver seat control unit. Refer to ADP-135, "Removal and Installation".
YES (Past error)>>Error was detected in the driver seat control unit branch line.
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Continuity
Connector No. Terminal No.
M125 46Existed
10 12 Existed
Driver seat control unit harness connector Resistance (Ω)
Connector No. Terminal No.
B451 1 17 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-134
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 1)]
E-SUS BRANCH LINE CIRCUIT
E-SUS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256258
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 fo r damage, bend and loose connection (unit side and con-
nector side).
- Air levelizer control module
- CAN gateway (With ICC system)
Is the inspection result normal?
YES (With ICC system)>>GO TO 2.
YES (Without ICC sy stem)>>GO TO 3.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of CAN gateway.
2. Check the continuity between the CA N gateway harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause (CAN communication circuit 2). Refer to LAN-57,
"System Diagram".
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Connect the connector of CAN gateway. (With ICC system)
2. Disconnect the connector of air levelizer control module.
3. Check the resistance between the air leveliz er control module harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the air levelizer control module branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the air levelizer control module. Refer to SCS-89,
"DiagnosisProcedure".
Is the inspection result normal?
YES (Present error)>>Replace the air levelizer control module. Refer to SCS-94, "Removal and Installation".
YES (Past error)>>Error was detected in t he air levelizer control module branch line.
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Continuity
Connector No. Terminal No.
M125 46Existed
10 12 Existed
Air levelizer control mo dule harness connector
Resistance (Ω)
Connector No. Terminal No.
B84 16 7 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
PWBD BRANCH LINE CIRCUITLAN-135
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
C
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G H
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B A
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PWBD BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256260
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 (unit side and con- nector side).
- Automatic back door control module
- CAN gateway (With ICC system)
Is the inspection result normal?
YES (With ICC system)>>GO TO 2.
YES (Without ICC system)>>GO TO 3.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of CAN gateway.
2. Check the continuity between the CAN gateway harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause (CAN communication circuit 2). Refer to LAN-57,
"System Diagram".
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Connect the connector of CAN gateway. (With ICC system)
2. Disconnect the connector of automatic back door control module.
3. Check the resistance between the automatic bac k door control module harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the automatic back door control module branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of t he automatic back door control module. Refer to DLK-116,
"AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the automat ic back door control module. Refer to DLK-262, "Removal and
Installation".
YES (Past error)>>Error was detected in the automatic back door control module branch line.
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Continuity
Connector No. Terminal No.
M125 46Existed
10 12 Existed
Automatic back door control module harness connector Resistance (Ω)
Connector No. Terminal No.
B26 7 6 Approx. 54 – 66
Revision: 2010 May2011 QX56