2011 INFINITI QX56 BATTERY

LAN
DLC BRANCH LINE CIRCUITLAN-185
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
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DLC BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256343
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 data link connector for damage, bend and loose connection (connector side and harness side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.
Is the measurement value within the specification?
YES (Present error)>>Check CA N system type decision again.
YES (Past error)>>Error was detected in the data link connector branch line circuit.
NO >> Repair the data link connector branch line.
Data link connector Resistance (Ω)
Connector No. Terminal No.
M4 6 14 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-186
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 3)]
HVAC BRANCH LINE CIRCUIT
HVAC BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256344
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the A/C auto amp. 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 A/C auto amp.
2. Check the resistance between the A/C auto amp. harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the A/C auto amp. branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circ uit of the A/C auto amp. Refer to HAC-110, "
A/C AUTO AMP. :
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the A/C auto amp. Refer to HAC-146, "Removal and Installation".
YES (Past error)>>Error was detect ed in the A/C auto amp. branch line.
NO >> Repair the power supply and the ground circuit.
A/C auto amp. harness connector Resistance (Ω)
Connector No. Terminal No.
M50 1 21 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
M&A BRANCH LINE CIRCUITLAN-187
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
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M&A BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256345
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 combination meter 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 combination meter.
2. Check the resistance between the combination meter harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the combination meter branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the combination meter. Refer to MWI-64, "
COMBINATION
METER : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the combination meter. Refer to MWI-85, "Removal and Installation".
YES (Past error)>>Error was detected in the combination meter branch line.
NO >> Repair the power supply and the ground circuit.
Combination meter harness connector Resistance (Ω)
Connector No. Terminal No.
M34 21 22 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-188
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 3)]
STRG BRANCH LINE CIRCUIT
STRG BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256346
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the steer ing angle sensor 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 steering angle sensor.
2. Check the resistance between the steeri ng angle sensor harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the steering angle sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-53, "
Wiring Dia-
gram".
Is the inspection result normal?
YES (Present error)>>Replace the steering angle sensor. Refer to BRC-139, "Removal and Installation".
YES (Past error)>>Error was detected in the steering angle sensor branch line.
NO >> Repair the power supply and the ground circuit.
Steering angle sensor harness connector Resistance (Ω)
Connector No. Terminal No.
M30 5 2 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
TPMS BRANCH LINE CIRCUITLAN-189
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
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TPMS BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256347
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 low ti re pressure warning control unit 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 low tire pressure warning control unit.
2. Check the resistance between the low tire pressure warning control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the low tire pressure warning control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the lo w tire pressure warning control unit. Refer to WT-51,
"Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the low tire pressure warning control unit. Refer to WT-65, "Removal and
Installation".
YES (Past error)>>Error was detected in the low tire pressure warning control unit branch line.
NO >> Repair the power supply and the ground circuit.
Low tire pressure warning control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M96 2 1 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-190
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 3)]
IPDM-E BRANCH LINE CIRCUIT
IPDM-E BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256348
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-191
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
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ADP BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256349
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-192
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 3)]
E-SUS BRANCH LINE CIRCUIT
E-SUS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256351
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