diagram INFINITI QX56 2011 Factory Service Manual

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]
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JCMWM8324GB
Revision: 2010 May2011 QX56

LAN
ADP BRANCH LINE CIRCUITLAN-133
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 1)]
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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)]
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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

LAN
CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 1)LAN-151
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
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CGW BRANCH LINE CI
RCUIT (CAN COMMUNICATION CIRCUIT 1)
Diagnosis ProcedureINFOID:0000000006256294
1.CHECK DTC
Check DTC of the CAN gat eway with CONSULT-III.
Is U1010 or B2600 indicated?
YES >> Perform a diagnosis of the indicated DTC.
NO >> GO TO 2.
2.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the terminals and connectors of the CAN gateway for damage, bend and loose connection (unit
side and connector side).
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the terminal and connector.
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of CAN gateway.
2. Check the resistance between the CA N gateway harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the CAN gateway branch line (CAN communication circuit 1). Refer to LAN-57, "
System
Diagram".
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the CAN gateway. Refer to LAN-116, "
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the CAN gateway. Refer to LAN-117, "Removal and Installation".
YES (Past error)>>Error was detected in the CAN gateway branch line (CAN communication circuit 1).
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Resistance (Ω)
Connector No. Terminal No.
M125 1 7 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-152
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
CGW BRANCH LINE CIRCUIT (CAN
COMMUNICATION CIRCUIT 2)
CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 2)
Diagnosis ProcedureINFOID:0000000006256295
1.CHECK DTC
Check DTC of the CAN gateway with CONSULT-III.
Is U1010 or B2600 indicated?
YES >> Perform a diagnosis of the indicated DTC.
NO >> GO TO 2.
2.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).
- CAN gateway
- Harness connector M19
- Harness connector B2
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 connector of CAN gateway.
2. Check the continuity between the CA N gateway harness connector terminals.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the CAN gateway branch line (CAN communication circuit 2). Refer to LAN-57, "
System
Diagram".
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circ uit of the CAN gateway. Refer to LAN-116, "
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the CAN gateway. Refer to LAN-117, "Removal and Installation".
YES (Past error)>>Error was detected in the CAN gateway branch line (CAN communication circuit 2).
NO >> Repair the power supply and the ground circuit.
CAN gateway harness connector Continuity
Connector No. Terminal No.
M125 46Existed
10 12 Existed
Revision: 2010 May2011 QX56

LAN
ADP BRANCH LINE CIRCUITLAN-159
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
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ADP BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256302
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-160
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
PSB BRANCH LINE CIRCUIT
PSB BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256303
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).
- Pre-crash seat belt control unit (driver side)
- CAN gateway
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 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.
2. Disconnect the connector of pre-crash seat belt control unit (driver side).
3. Check the resistance between the pre-crash seat bel t control unit (driver side) harness connector termi-
nals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the pre-crash seat belt control unit (driver side) branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the pre- crash seat belt control unit (driver side). Refer to
SBC-52, "
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the seat belt pr e-tensioner retractor (LH side). Refer to SB-6, "SEAT BELT
RETRACTOR : Removal and Installation".
YES (Past error)>>Error was detected in the pre-cr ash seat belt control unit (driver side) 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
Pre-crash seat belt control unit (driver side) harness connector Resistance (Ω)
Connector No. Terminal No.
B9 14 4 Approx. 54 – 66
Revision: 2010 May2011 QX56