2011 INFINITI QX56 ground

LAN-158
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
IPDM-E BRANCH LINE CIRCUIT
IPDM-E BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256301
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).
-IPDME/R
- Harness connector E105
- Harness connector M77
- Harness connector M19 (Without ICC system)
- Harness connector B2 (Without ICC system)
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 IPDM E/R.
2. Check the resistance between the IPDM E/R harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the IPDM E/R branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the IPDM E/R. Refer to PCS-31, "
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the IPDM E/R. Refer to PCS-32, "Removal and Installation".
YES (Past error)>>Error was detec ted in the IPDM E/R branch line.
NO >> Repair the power supply and the ground circuit.
IPDM E/R harness connector Resistance (Ω)
Connector No. Terminal No.
E13 27 26 Approx. 108 – 132
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

LAN
E-SUS BRANCH LINE CIRCUITLAN-161
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
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E-SUS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256304
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).
- Air levelizer 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 air levelizer control module.
3. Check the resistance between the air leveli zer 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 the 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-162
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
ICC BRANCH LINE CIRCUIT
ICC BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256305
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).
- ADAS control unit
- 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 ADAS control unit.
3. Check the resistance between the ADAS control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the ADAS control unit branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ADAS control unit. Refer to DAS-62, "
Diagnosis Proce-
dure".
Is the inspection result normal?
YES (Present error)>>Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
YES (Past error)>>Error was detected in the ADAS 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
ADAS control unit harness connector Resistance (Ω)
Connector No. Terminal No.
B61 14 15 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
PWBD BRANCH LINE CIRCUITLAN-163
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
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PWBD BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256306
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-164
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
RDR-R BRANCH LINE CIRCUIT
RDR-R BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256307
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connecto rs of the side radar RH for damage, bend and loose connection (unit
side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK RIGHT/LEFT SWITCHING SIGNAL CIRCUIT
Check the right/left switching signal ci rcuit of the side radar RH. Refer to DAS-514, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the root cause.
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of side radar RH.
2. Check the resistance between the side radar RH harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the side radar RH branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circ uit of the side radar RH. Refer to DAS-513, "
SIDE RADAR RH :
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the side radar RH. Refer to DAS-523, "Removal and Installation".
YES (Past error)>>Error was detect ed in the side radar RH branch line.
NO >> Repair the power supply and the ground circuit.
Side radar RH harness connector Resistance (Ω)
Connector No. Terminal No.
B243 4 3 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
RDR-L BRANCH LINE CIRCUITLAN-165
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
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RDR-L BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256308
1.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 side radar LH for damage, bend and loose connection (unit
side and connector side).
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 side radar LH.
2. Check the resistance between the side radar LH harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the side radar LH branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the side radar LH. Refer to DAS-512, "
SIDE RADAR LH :
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the side radar LH. Refer to DAS-523, "Removal and Installation".
YES (Past error)>>Error was detected in the side radar LH branch line.
NO >> Repair the power supply and the ground circuit.
Side radar LH harness connector Resistance (Ω)
Connector No. Terminal No.
B74 4 3 Approx. 54 – 66
Revision: 2010 May2011 QX56