2011 INFINITI QX56 Factory Service Manual

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Page 3593 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
ITS COMMUNICATION CIRCUITLAN-173
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
C
D
E
F
G H
I
J
K L
B A
O P
N
ITS COMMUNICATION CIRCUIT
Diagnosis ProcedureINFOID:0000000006256315
1.CHECK CAN DIA

LAN
ITS COMMUNICATION CIRCUITLAN-173
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 2)]
C
D
E
F
G H
I
J
K L
B A
O P
N
ITS COMMUNICATION CIRCUIT
Diagnosis ProcedureINFOID:0000000006256315
1.CHECK CAN DIAGNOSIS
Check the CAN diagnosis results from CONSULT-III to see that the CAN communication circuit 1 and CAN
communication circuit 2 have no malfunction.
NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication cir-
cuit, refer to LAN-57, "
System Diagram".
Are the CAN communication 1 and CAN communication 2 circuits normal?
YES >> GO TO 2.
NO >> Check and repair CAN communication circ uit 1 and/or CAN communication circuit 2.
2.CONNECTOR INSPECTION
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).
- ADAS control unit
- Harness connector B63
- Harness connector B239
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 following harness connectors.
- ADAS control unit
- ICC sensor
2. Check the continuity between the ADAS control unit harness connector and the ICC sensor harness con-
nector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the ADAS control unit branch li ne. (ITS communication circuit). Refer to LAN-57, "
System
Diagram".
4.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
1. Disconnect the following harness connectors.
- Side radar RH
- Side radar LH
- Lane camera unit
- Accelerator pedal actuator
2. Check the continuity between the ADAS control unit harness connector terminals.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Check the harness and repair the root cause.
ADAS control unit harness connector ICC sensor harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
B61 7
E65 3Existed
86Existed
ADAS control unit harness connector Continuity
Connector No. Terminal No.
B61 7 8 Not existed
Revision: 2010 May2011 QX56

Page 3594 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-174
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
ITS COMMUNICATION CIRCUIT
5.CHECK HARNESS CONTI
NUITY (SHORT CIRCUIT)
Check the continuity between the ADAS control unit harness connector and t

LAN-174
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 2)]
ITS COMMUNICATION CIRCUIT
5.CHECK HARNESS CONTI
NUITY (SHORT CIRCUIT)
Check the continuity between the ADAS control unit harness connector and the ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Check the harness and repair the root cause.
6.CHECK TERMINATION CIRCUIT
1. Remove the ADAS control unit and the ICC sensor.
2. Check the resistance between the ADAS control unit terminals.
3. Check the resistance between the ICC sensor terminals.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace the ADAS control unit and/or the ICC sensor.
7.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms descri bed in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 8.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
8.CHECK UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each unit.
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect one of the unit connectors of ITS communication circuit. NOTE:
ADAS control unit and ICC sensor have a term ination circuit. Check other units first.
4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
ADAS control unit harness connector
GroundContinuity
Connector No. Terminal No.
B61 7 Not existed
8 Not existed
ADAS control unit
Resistance (Ω)
Te r m i n a l N o .
7 8 Approx. 108 – 132
ICC sensor Resistance (Ω)
Te r m i n a l N o .
3 6 Approx. 108 – 132
Revision: 2010 May2011 QX56

Page 3595 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
MAIN LINE BETWEEN ABS AND DLC CIRCUIT
LAN-175
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
C
D
E
F
G H
I
J
K L
B A
O P
N
DTC/CIRCUIT DIAGNOSIS
MAIN LINE BETWEEN ABS AND DLC CIRCUIT
Diagnosis P

Page 3596 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-176
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 3)]
MAIN LINE BETWEEN DLC AND E-SUS CIRCUIT
MAIN LINE BETWEEN DL
C AND E-SUS CIRCUIT
Diagnosis ProcedureINFOID:0000000006256327
1.CHECK CONNECTOR
1.

Page 3597 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
MAIN LINE BETWEEN E-SUS AND ADP CIRCUITLAN-177
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
C
D
E
F
G H
I
J
K L
B A
O P
N
MAIN LINE BETWEEN E-SUS AND ADP CIRCUIT
Diagnosis ProcedureINFOID:0000

Page 3598 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-178
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 3)]
ECM BRANCH LINE CIRCUIT
ECM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256333
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2.

Page 3599 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN
4WD BRANCH LINE CIRCUITLAN-179
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 3)]
C
D
E
F
G H
I
J
K L
B A
O P
N
4WD BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256334
1.CHECK CONNECTOR
1

Page 3600 of 5598

INFINITI QX56 2011 Factory Service Manual
LAN-180
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 3)]
ABS BRANCH LINE CIRCUIT
ABS BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256335
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2.

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