2011 INFINITI QX56 Factory Service Manual

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Page 3497 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 2)LAN-77
< DTC/CIRCUIT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
CGW BRANCH LINE CI
RCUIT (CAN COMMUNICATION CIRCUIT 2)
Diagnosis Procedur

Page 3498 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-78
< DTC/CIRCUIT DIAGNOSIS >[CAN]
DLC BRANCH LINE CIRCUIT
DLC BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220554
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the b

Page 3499 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
HVAC BRANCH LINE CIRCUITLAN-79
< DTC/CIRCUIT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
HVAC BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220555
1.CHECK CONNECTOR
1. Turn the ign

Page 3500 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-80
< DTC/CIRCUIT DIAGNOSIS >[CAN]
M&A BRANCH LINE CIRCUIT
M&A BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220556
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the b

Page 3501 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
STRG BRANCH LINE CIRCUITLAN-81
< DTC/CIRCUIT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
STRG BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220557
1.CHECK CONNECTOR
1. Turn the ign

Page 3502 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-82
< DTC/CIRCUIT DIAGNOSIS >[CAN]
TPMS BRANCH LINE CIRCUIT
TPMS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220558
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the

Page 3503 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
IPDM-E BRANCH LINE CIRCUITLAN-83
< DTC/CIRCUIT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
IPDM-E BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220559
1.CHECK CONNECTOR
1. Turn the

Page 3504 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-84
< DTC/CIRCUIT DIAGNOSIS >[CAN]
ADP BRANCH LINE CIRCUIT
ADP BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220560
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the b

LAN-84
< DTC/CIRCUIT DIAGNOSIS >[CAN]
ADP BRANCH LINE CIRCUIT
ADP BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006220560
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).
- 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 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 driver seat control unit.
3. Check the resistance between the driver seat 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 driv er 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

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