2011 INFINITI QX56 Factory Service Manual

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Page 3633 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
HVAC BRANCH LINE CIRCUITLAN-213
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
C
D
E
F
G H
I
J
K L
B A
O P
N
HVAC BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256384
1.CHECK CONNECTO

Page 3634 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-214
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
M&A BRANCH LINE CIRCUIT
M&A BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256385
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2.

Page 3635 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
STRG BRANCH LINE CIRCUITLAN-215
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
C
D
E
F
G H
I
J
K L
B A
O P
N
STRG BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256386
1.CHECK CONNECTO

Page 3636 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-216
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
TPMS BRANCH LINE CIRCUIT
TPMS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256387
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.

Page 3637 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
IPDM-E BRANCH LINE CIRCUITLAN-217
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
C
D
E
F
G H
I
J
K L
B A
O P
N
IPDM-E BRANCH
LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256388
1.CHECK CONN

Page 3638 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-218
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
ADP BRANCH LINE CIRCUIT
ADP BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256389
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2.

LAN-218
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
ADP BRANCH LINE CIRCUIT
ADP BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256389
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

Page 3639 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
PSB BRANCH LINE CIRCUITLAN-219
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
C
D
E
F
G H
I
J
K L
B A
O P
N
PSB BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256390
1.CHECK CONNECTOR
1

LAN
PSB BRANCH LINE CIRCUITLAN-219
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
C
D
E
F
G H
I
J
K L
B A
O P
N
PSB BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256390
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).
- 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 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.
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

Page 3640 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-220
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
E-SUS BRANCH LINE CIRCUIT
E-SUS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256391
1.CHECK CONNECTOR
1. Turn the ignition switch OFF

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