INFINITI QX56 2010 Factory Service Manual

LAN
MAIN LINE BETWEEN TCM AND LASER CIRCUITLAN-63
< COMPONENT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
MAIN LINE BETWEEN TC
M AND LASER CIRCUIT
Diagnosis ProcedureINFOID:0000000005146472
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 (connector side
and harness side).
- Harness connector F14
- Harness connector E5
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 harness connectors F14 and E5.
2. Check the continuity between the harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the A/T assembly and the harness connector F14.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC sensor.
2. Check the continuity between the harness connector and the ICC sensor harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the A/T assembly and the ICC sensor.
NO >> Repair the main line between the harness connector E5 and the ICC sensor.
Connector No. Terminal No. Continuity
F14 35E
xis te d
14 15Existed
Harness connector ICC sensor harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
E5 5
E42 2
Existed
15 3Existed
Revision: April 20092010 QX56

LAN-64
< COMPONENT DIAGNOSIS >[CAN]
MAIN LINE BETWEEN LASER AND ICC CIRCUIT
MAIN LINE BETWEEN LA
SER AND ICC CIRCUIT
Diagnosis ProcedureINFOID:0000000005146473
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 for damage, bend and loose connection (connector side and harness side).
- Harness connector E34
- Harness connector B40
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 following harness connectors.
- ICC sensor
- Harness connectors E34 and B40
2. Check the continuity between the ICC sens or harness connector and the harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the ICC sensor and the harness connector E34.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC unit.
2. Check the continuity between the harness connector and the ICC unit harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECUlist” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the ma in line between the ICC sensor and the ICC unit.
NO >> Repair the main line between the harness connector B40 and the ICC unit.
ICC sensor harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
E42 2
E34 24
Existed
3 23Existed
Harness connector ICC unit harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
B40 24
B13 14
Existed
23 5Existed
Revision: April 20092010 QX56

LAN
MAIN LINE BETWEEN ICC AND ADP CIRCUITLAN-65
< COMPONENT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
MAIN LINE BETWEEN ICC AND ADP CIRCUIT
Diagnosis ProcedureINFOID:0000000005146474
1.CHECK HARNESS CONTI
NUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect the following harness connectors.
-ECM
- ICC unit
- Harness connectors B37 and B200
4. Check the continuity between the ICC unit harness connector and the harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main li ne between the ICC unit and the driver seat control unit.
NO >> Repair the main line between t he ICC unit and the harness connector B37.
ICC unit harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
B13 14
B37 15
Existed
5 14Existed
Revision: April 20092010 QX56

LAN-66
< COMPONENT DIAGNOSIS >[CAN]
MAIN LINE BETWEE
N ADP AND AV CIRCUIT
MAIN LINE BETWEEN ADP AND AV CIRCUIT
Diagnosis ProcedureINFOID:0000000005146475
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 for damage, bend and loose connection (connector side and harness side).
- Harness connector B69
- Harness connector M40
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 following harness connectors.
- Harness connectors B200 and B37
- Harness connectors B69 and M40
2. Check the continuity bet ween the harness connectors.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the harness connectors B37 and B69.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of AV control unit.
2. Check the continuity between the harness conn ector and the AV control unit harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECUlist” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the driver seat control unit and the AV control
unit.
NO >> Repair the main line between the harness connector M40 and the AV control unit.
Harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
B37 15
B69 51J
Existed
14 52JExisted
Harness connector AV control unit harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
M40 51J
M45 96
Existed
52J 97Existed
Revision: April 20092010 QX56

LAN
MAIN LINE BETWEEN AV AND DLC CIRCUITLAN-67
< COMPONENT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
MAIN LINE BETWEEN AV AND DLC CIRCUIT
Diagnosis ProcedureINFOID:0000000005146476
1.CHECK HARNESS CONTI
NUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect the following harness connectors.
-ECM
- AV control unit
4. Check the continuity between the AV contro l unit harness connector and the data link connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the AV control unit and the data link connec-
tor.
NO >> Repair the main line between the AV control unit and the data link connector.
AV control unit harness connector Data link connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
M45 96
M22 6
Existed
97 14Existed
Revision: April 20092010 QX56

LAN-68
< COMPONENT DIAGNOSIS >[CAN]
MAIN LINE BETWEEN DLC AND M&A CIRCUIT
MAIN LINE BETWEEN
DLC AND M&A CIRCUIT
Diagnosis ProcedureINFOID:0000000005146477
1.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
-ECM
- Combination meter
4. Check the continuity between the data link connector and the combination meter harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the data link connector and the combination
meter.
NO >> Repair the main line between the data link connector and the combination meter.
Data link connector Combination meter harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
M22 6
M24 10
Existed
14 11Existed
Revision: April 20092010 QX56

LAN
MAIN LINE BETWEEN M&A AND ABS CIRCUITLAN-69
< COMPONENT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
MAIN LINE BETWEEN
M&A AND ABS CIRCUIT
Diagnosis ProcedureINFOID:0000000005156117
INSPECTION PROCEDURE
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 (connector side
and harness side).
- Harness connector M31
- Harness connector E152
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 following harness connectors.
- Combination meter
- Harness connectors M31 and E152
2. Check the continuity between the combinati on meter harness connector and the harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the combination meter and the harness connector M31.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of ABS actuat or and electric unit (control unit).
2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)
harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the combination meter and the ABS actuator
and electric unit (control unit).
NO >> Repair the main line between the harness connec tor E152 and the ABS actuator and electric unit
(control unit).
Combination meter harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
M24 10
M31 31G
Existed
11 42GExisted
Harness connector ABS actuator and electric unit (control unit)
harness connector Continuity
Connector No. Terminal No.Connector No. Terminal No.
E152 31G
E125 11
E x i s t e d
42G 15Existed
Revision: April 20092010 QX56

LAN-70
< COMPONENT DIAGNOSIS >[CAN]
MAIN LINE BETWEEN M&A AND 4WD CIRCUIT
MAIN LINE BETWEEN
M&A AND 4WD CIRCUIT
Diagnosis ProcedureINFOID:0000000005146478
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 for damage, bend and loose connection (connector side and harness side).
- Harness connector M31
- Harness connector E152
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 following harness connectors.
- Combination meter
- Harness connectors M31 and E152
2. Check the continuity between the combination meter harness connector and the harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the main line between the combination meter and the harness connector M31.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the connector of transfer control unit.
2. Check the continuity between the harness connector and the transfer control unit harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECUlist” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main line between the combination meter and the transfer con-
trol unit.
NO >> Repair the main line between the harness connector E152 and the transfer control unit.
Combination meter harness connector Harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
M24 10
M31 31G
Existed
11 42GExisted
Harness connector Transfer control unit harness connector
Continuity
Connector No. Terminal No.Connector No. Terminal No.
E152 31G
E142 7
Existed
42G 8Existed
Revision: April 20092010 QX56

LAN
MAIN LINE BETWEEN 4WD AND ABS CIRCUITLAN-71
< COMPONENT DIAGNOSIS > [CAN]
C
D
E
F
G H
I
J
K L
B A
O P
N
MAIN LINE BETWEEN 4WD AND ABS CIRCUIT
Diagnosis ProcedureINFOID:0000000005152915
1.CHECK HARNESS CONTI
NUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect the following harness connectors.
-ECM
- Transfer control unit
- ABS actuator and electric unit (control unit)
4. Check the continuity between the transfer control unit harness connector and t he ABS actuator and elec-
tric unit (control unit) harness connector.
Is the inspection result normal?
YES (Present error)>>Check the following items again. • Decision of CAN system type.
• Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU
list” included)].
• Procedure for detecting root cause.
YES (Past error)>>Error was detected in the main li ne between the transfer control unit and the ABS actuator
and electric unit (control unit).
NO >> Repair the main line between the transfer cont rol unit and the ABS actuator and electric unit (con-
trol unit).
Transfer control unit harness connector ABS actuator and electric unit (control unit)
harness connector Continuity
Connector No. Terminal No.Connector No. Terminal No.
E142 7
E125 11
E x i s t e d
8 15Existed
Revision: April 20092010 QX56

LAN-72
< COMPONENT DIAGNOSIS >[CAN]
ECM BRANCH LINE CIRCUIT
ECM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000005146479
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).
-ECM
- Harness connector E5
- Harness connector F14
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 ECM.
2. Check the resistance between the ECM harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the ECM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to EC-82, "
Diagnosis Procedure".
Is the inspection result normal?
YES (Present error)>>Replace the ECM. Refer to EC-17, "Procedure After Replacing ECM".
YES (Past error)>>Error was detected in the ECM branch line.
NO >> Repair the power supply and the ground circuit.
ECM harness connector Resistance (Ω)
Connector No. Terminal No.
E16 9486Approx. 108 – 132
Revision: April 20092010 QX56