2011 INFINITI QX56 BATTERY CONNECTORS

LAN
RDR-R BRANCH LINE CIRCUITLAN-223
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
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RDR-R BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256394
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 side radar RH 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 RIGHT/LEFT SWIT CHING SIGNAL CIRCUIT
Check the right/left switching signal circuit of the side radar RH. Refer to DAS-514, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the root cause.
3.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of side radar RH.
2. Check the resistance between the side radar RH harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 4.
NO >> Repair the side radar RH branch line.
4.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the side radar RH. Refer to DAS-513, "
SIDE RADAR RH :
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the side radar RH. Refer to DAS-523, "Removal and Installation".
YES (Past error)>>Error was detected in the side radar RH branch line.
NO >> Repair the power supply and the ground circuit.
Side radar RH harness connector Resistance (Ω)
Connector No. Terminal No.
B243 4 3 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-224
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
RDR-L BRANCH LINE CIRCUIT
RDR-L BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256395
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 side radar LH 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 side radar LH.
2. Check the resistance between the side radar LH harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the side radar LH branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the side radar LH. Refer to DAS-512, "
SIDE RADAR LH :
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the side radar LH. Refer to DAS-523, "Removal and Installation".
YES (Past error)>>Error was detect ed in the side radar LH branch line.
NO >> Repair the power supply and the ground circuit.
Side radar LH harness connector Resistance (Ω)
Connector No. Terminal No.
B74 4 3 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
LANE BRANCH LINE CIRCUITLAN-225
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
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LANE BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256396
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 lane ca mera 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 lane camera unit.
2. Check the resistance between the lane camera unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the lane camera unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the lane camera unit. Refer to DAS-387, "
LANE CAMERA
UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the lane camera unit. Refer to DAS-403, "Removal and Installation".
YES (Past error)>>Error was detected in the lane camera unit branch line.
NO >> Repair the power supply and the ground circuit.
Lane camera unit harness connector Resistance (Ω)
Connector No. Terminal No.
R8 4 8 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN-226
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
APA BRANCH LINE CIRCUIT
APA BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256397
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 accele rator pedal actuator for damage, bend and loose con-
nection (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 accelerator pedal actuator.
2. Check the resistance between the accelera tor pedal actuator harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the accelerator pedal actuator branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the accelerator pedal actuator. Refer to DAS-195, "
ACCEL-
ERATOR PEDAL ACTUATOR : Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the accelerator pedal assembly. Refer to ACC-4, "MODELS WITH DIS-
TANCE CONTROL ASSIST SYSTEM : Removal and Installation".
YES (Past error)>>Error was detected in the accelerator pedal actuator branch line.
NO >> Repair the power supply and the ground circuit.
Accelerator pedal actuator harness connector Resistance (Ω)
Connector No. Terminal No.
E66 5 4 Approx. 54 – 66
Revision: 2010 May2011 QX56

LAN
LASER BRANCH LINE CIRCUITLAN-227
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
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LASER BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000006256398
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 ICC s ensor 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 ICC sensor.
2. Check the resistance between the I CC sensor harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the ICC sensor branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ICC sensor. Refer to CCS-158, "
ICC SENSOR : Diagno-
sis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the ICC sensor. Refer to CCS-176, "Removal and Installation".
YES (Past error)>>Error was detect ed in the ICC sensor branch line.
NO >> Repair the power supply and the ground circuit.
ICC sensor harness connector Resistance (Ω)
Connector No. Terminal No.
E65 3 6 Approx. 108 – 132
Revision: 2010 May2011 QX56

LAN-228
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
CAN COMMUNICATION CIRCUIT 1
CAN COMMUNICATION CIRCUIT 1
Diagnosis ProcedureINFOID:0000000006256400
1.CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect all the unit connectors on CAN communication circuit 1. NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication
circuit, refer to LAN-57, "
System Diagram".
4. Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (SHORT CIRCUIT)
Check the continuity between t he data link connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause.
3.CHECK HARNESS CONTI NUITY (SHORT CIRCUIT)
Check the continuity between the data link connector and the ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
4.CHECK ECM AND IPDM E/R TERMINATION CIRCUIT
1. Remove the ECM and the IPDM E/R.
2. Check the resistance between the ECM terminals.
3. Check the resistance between the IPDM E/R terminals.
Is the measurement value within the specification?
YES >> GO TO 5.
NO >> Replace the ECM and/or the IPDM E/R.
Data link connector Continuity
Connector No. Terminal No.
M4 6 14 Not existed
Data link connector
GroundContinuity
Connector No. Terminal No.
M4 6 Not existed
14 Not existed
ECM Resistance (Ω)
Te r m i n a l N o .
146 151 Approx. 108 – 132
IPDM E/R Resistance (Ω)
Te r m i n a l N o .
27 26 Approx. 108 – 132
Revision: 2010 May2011 QX56

LAN
CAN COMMUNICATION CIRCUIT 1LAN-229
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
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5.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms descr ibed in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
6.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 cabl e from the negative terminal.
3. Disconnect one of the unit connectors of CAN communication circuit 1.
NOTE:
ECM and IPDM E/R have a termination 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.
Revision: 2010 May2011 QX56

LAN-230
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
CAN COMMUNICATION CIRCUIT 2
CAN COMMUNICATION CIRCUIT 2
Diagnosis ProcedureINFOID:0000000006256401
1.CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect all the unit connectors on CAN communication circuit 2. NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication
circuit, refer to LAN-57, "
System Diagram".
4. Check terminals and connectors for damage, bend and loose connection.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS CONTI NUITY (SHORT CIRCUIT)
Check the continuity between t he data link connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check the harness and repair the root cause.
3.CHECK HARNESS CONTI NUITY (SHORT CIRCUIT)
Check the continuity between the data link connector and the ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check the harness and repair the root cause.
4.CHECK CAN GATEWAY TERMINATION CIRCUIT
1. Remove the CAN gateway.
2. Check the resistance between the CAN gateway terminals.
Is the measurement value within the specification?
YES >> GO TO 5.
NO >> Replace the CAN gateway.
5.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 6.
Data link connector Continuity
Connector No. Terminal No.
M4 13 12 Not existed
Data link connector
GroundContinuity
Connector No. Terminal No.
M4 13 Not existed
12 Not existed
CAN gateway
Resistance (Ω)
Te r m i n a l N o .
4 10 Approx. 108 – 132
6 12 Approx. 108 – 132
Revision: 2010 May2011 QX56