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![INFINITI QX56 2011 Factory Service Manual
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TCM BRANCH LINE CIRCUITLAN-205
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TCM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256376
1.CHECK CONNECTOR
1 INFINITI QX56 2011 Factory Service Manual
LAN
TCM BRANCH LINE CIRCUITLAN-205
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TCM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256376
1.CHECK CONNECTOR
1](/manual-img/42/57033/w960_57033-3624.png)
LAN
TCM BRANCH LINE CIRCUITLAN-205
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TCM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256376
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).
- A/T assembly
- Harness connector F1
- Harness connector E7
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/T assembly.
2. Check the resistance between the A/T assembly harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the TCM branch line.
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Remove the joint connector. Refer to TM-182, "
Removal and Installation".
2. Check the continuity between the A/T assembly harness connector side and the TCM harness connector
side of the joint connector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace the joint connector.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the TCM. Refer to TM-151, "
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the control valve & TCM. Refer to TM-182, "Removal and Installation".
YES (Past error)>>Error was detected in the TCM branch line.
NO >> Repair the power supply and the ground circuit.
A/T assembly harness connector Resistance (Ω)
Connector No. Terminal No.
F51 3 8 Approx. 54 – 66
A/T assembly harness connector side TCM harness connector side Continuity
Terminal No. Terminal No.
33Existed
88Existed
Revision: 2010 May2011 QX56
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LAN-206
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
A-BAG BRANCH LINE CIRCUIT
A-BAG BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256377
WARNING:
Before servicing, turn ignition switch OFF, disco
nnect battery negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)
Never use unspecified tester or other measuring device.
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 air bag diagnosis sensor unit for damage, bend and loose con-
nection (unit side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the main harness.
2.CHECK AIR BAG DIAGNOSIS SENSOR UNIT
Check the air bag diagnosis sensor unit. Refer to SRC-36, "
Work Flow".
Is the inspection result normal?
YES >> Replace the main harness.
NO >> Replace parts whose air bag system has a malfunction.
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
LAN
AFS BRANCH LINE CIRCUITLAN-207
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AFS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256378
1.CHECK CONNECTOR
1 INFINITI QX56 2011 Factory Service Manual
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AFS BRANCH LINE CIRCUITLAN-207
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Diagnosis ProcedureINFOID:0000000006256378
1.CHECK CONNECTOR
1](/manual-img/42/57033/w960_57033-3626.png)
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AFS BRANCH LINE CIRCUITLAN-207
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AFS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256378
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 AFS c ontrol 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 AFS control unit.
2. Check the resistance between the AFS control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the AFS control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circui t of the AFS control unit. Refer to EXL-84, "
AFS CONTROL
UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the AFS control unit. Refer to EXL-135, "Removal and Installation".
YES (Past error)>>Error was detected in the AFS control unit branch line.
NO >> Repair the power supply and the ground circuit.
AFS control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M135 30 7 Approx. 54 – 66
Revision: 2010 May2011 QX56
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LAN-208
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
AV BRANCH LINE CIRCUIT
AV BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256379
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. D INFINITI QX56 2011 Factory Service Manual
LAN-208
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
AV BRANCH LINE CIRCUIT
AV BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256379
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. D](/manual-img/42/57033/w960_57033-3627.png)
LAN-208
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
AV BRANCH LINE CIRCUIT
AV BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256379
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).
- AV control unit
- Harness connector M222
- Harness connector M119
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 AV control unit.
2. Check the resistance between the AV control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the AV control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the AV control unit. Refer to AV-161, "
AV CONTROL UNIT :
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the AV control unit. Refer to AV-212, "Removal and Installation".
YES (Past error)>>Error was detected in the AV control unit branch line.
NO >> Repair the power supply and the ground circuit.
AV control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M210 90 74 Approx. 54 – 66
Revision: 2010 May2011 QX56
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LAN
BCM BRANCH LINE CIRCUITLAN-209
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BCM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256380
1.CHECK CONNECTOR
1 INFINITI QX56 2011 Factory Service Manual
LAN
BCM BRANCH LINE CIRCUITLAN-209
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Diagnosis ProcedureINFOID:0000000006256380
1.CHECK CONNECTOR
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BCM BRANCH LINE CIRCUITLAN-209
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BCM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256380
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 BC M 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 BCM.
2. Check the resistance between the BCM harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the BCM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the BCM. Refer to BCS-75, "
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to BCS-81, "Removal and Installation".
YES (Past error)>>Error was detected in the BCM branch line.
NO >> Repair the power supply and the ground circuit.
BCM harness connector Resistance (Ω)
Connector No. Terminal No.
M68 39 40 Approx. 54 – 66
Revision: 2010 May2011 QX56
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LAN-210
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
CGW BRANCH LINE CIRCUIT (CAN
COMMUNICATION CIRCUIT 1)
CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 1)
Diagnosis ProcedureINFOID:000000000 INFINITI QX56 2011 Factory Service Manual
LAN-210
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
CGW BRANCH LINE CIRCUIT (CAN
COMMUNICATION CIRCUIT 1)
CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 1)
Diagnosis ProcedureINFOID:000000000](/manual-img/42/57033/w960_57033-3629.png)
LAN-210
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
CGW BRANCH LINE CIRCUIT (CAN
COMMUNICATION CIRCUIT 1)
CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 1)
Diagnosis ProcedureINFOID:0000000006256381
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 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 CAN 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 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 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
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LAN
CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 2)LAN-211
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CGW BRANCH LINE CI
RCUIT (CAN COMMUNICATION CIRCUIT 2)
D INFINITI QX56 2011 Factory Service Manual
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CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 2)LAN-211
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CGW BRANCH LINE CI
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LAN
CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 2)LAN-211
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CGW BRANCH LINE CI
RCUIT (CAN COMMUNICATION CIRCUIT 2)
Diagnosis ProcedureINFOID:0000000006256382
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 following terminals and connectors for 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 CAN 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 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 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
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LAN-212
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
DLC BRANCH LINE CIRCUIT
DLC BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256383
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 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 CAN 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