2007 INFINITI QX56 Factory Service Manual

air suspension fuel type fuel cap release AUX USB port parking sensors

Page 2193 of 3061

INFINITI QX56 2007 Factory Service Manual LAN-62
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
SHORT CIRCUIT
Main Line Between TCM and Driver Seat Control UnitINFOID:0000000003533640
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignitio

LAN-62
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
SHORT CIRCUIT
Main Line Between TCM and Driver Seat Control UnitINFOID:0000000003533640
INSPECTION PROCEDURE
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 F14
- Harness connector E5
- Harness connector E34
- Harness connector B40
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of A/T assembly and the harness connectors F14 and E5.
2. Check the continuity between the A/T assembly harness connector and the harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair the main line between the A/T assembly and the harness connector F14.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the harness connectors E34 and B40.
2. Check the continuity between harness connectors.
BCM branch line circuit LAN-70, "BCM Branch Line Circuit"
Display control unit branch line circuit LAN-70, "Display Control Unit Branch Line Circuit"
Data link connector branch line circuit LAN-71, "Data Link Connector Branch Line Circuit"
Front air control branch line circuitLAN-71, "Front Air Control Branch Line Circuit"
Combination meter branch line circuit LAN-72, "Combination Meter Branch Line Circuit"
Steering angle sensor branch line circuit LAN-72, "Steering Angle Sensor Branch Line Circuit"
Transfer control unit branch line circuitLAN-73, "Transfer Control Unit Branch Line Circuit"
ABS actuator and electric unit (control unit) branch line circuit LAN-74, "ABS Actuator and Electric Unit (Control Unit) Branch
Line Circuit"
IPDM E/R branch line circuit LAN-74, "IPDM E/R Branch Line Circuit"
Malfunction Area Reference
Malfunction Area Reference
CAN communication circuitLAN-75, "
CAN Communication Circuit"
A/T assembly harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
F93
F145Yes
815Yes
Harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.

Page 2194 of 3061

INFINITI QX56 2007 Factory Service Manual TROUBLE DIAGNOSIS
LAN-63
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
OK or NG
OK >> GO TO 4.
NG >> Repair the main line between the harness connectors E5 and E34.
4.CHECK HARNESS CON

Page 2195 of 3061

INFINITI QX56 2007 Factory Service Manual LAN-64
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
OK or NG
OK >> • Present error: Check the following items again.
- Decision of CAN system type.
- Not received CONSULT-II data (SELECT SYSTEM, S

LAN-64
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
OK or NG
OK >> • Present error: Check the following items again.
- Decision of CAN system type.
- Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the TCM and the ICC sensor.
NG >> Repair the main line between the harness connector E5 and the ICC sensor.
Main Line Between ICC Sensor and ICC UnitINFOID:0000000003533642
INSPECTION PROCEDURE
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
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC sensor and the harness connectors E34 and B40.
2. Check the continuity between the ICC sensor harness connector and the harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair the main line between the ICC sensor and the harness connector E34.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of ICC unit.
2. Check the continuity between the harness connector and the ICC unit harness connector.
OK or NG
OK >> • Present error: Check the following items again.
- Decision of CAN system type.
- Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
Harness connector ICC sensor harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E55
E422Yes
15 3 Yes
ICC sensor harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E422
E3424 Yes
323Yes
Harness connector ICC unit harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B4024
B1314 Yes
23 5 Yes

Page 2196 of 3061

INFINITI QX56 2007 Factory Service Manual TROUBLE DIAGNOSIS
LAN-65
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in

TROUBLE DIAGNOSIS
LAN-65
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the ICC sensor and the ICC unit.
NG >> Repair the main line between the harness connector B40 and the ICC unit.
Main Line Between ICC Unit and Driver Seat Control UnitINFOID:0000000003533643
INSPECTION PROCEDURE
1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
- ECM harness connector
- ICC unit harness connector
- Harness connectors B37 and P1
4. Check continuity between the ICC unit harness connector and the harness connector.
OK or NG
OK >> • Present error: Check the following items again.
- Decision of CAN system type.
- Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the ICC unit and the driver seat control
unit.
NG >> Repair the main line between the ICC unit and the harness connector B37.
Main Line Between Driver Seat Control Unit and Data Link ConnectorINFOID:0000000003533644
INSPECTION PROCEDURE
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
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- Harness connectors P1 and B37
- Harness connectors B69 and M40
2. Check the continuity between harness connectors.
ICC unit harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B1314
B3715 Yes
514Yes
Harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.

Page 2197 of 3061

INFINITI QX56 2007 Factory Service Manual LAN-66
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
OK or NG
OK >> GO TO 3.
NG >> Repair the main line between the harness connectors B37 and B69.
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
Check the

Page 2198 of 3061

INFINITI QX56 2007 Factory Service Manual TROUBLE DIAGNOSIS
LAN-67
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)
harne

TROUBLE DIAGNOSIS
LAN-67
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)
harness connector.
OK or NG
OK >> • Present error: Check the following items again.
- Decision of CAN system type.
- Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the data link connector and the ABS
actuator and electric unit (control unit).
NG >> Repair the main line between the harness connector E152 and the ABS actuator and electric unit
(control unit).
ECM Branch Line CircuitINFOID:0000000003533646
INSPECTION PROCEDURE
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 (unit side and con-
nector side).
- ECM connector
- Harness connector E5
- Harness connector F14
OK or NG
OK >> GO TO 2.
NG >> 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.
OK or NG
OK >> GO TO 3.
NG >> 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-101, "
Circuit Diagram".
OK or NG
OK >> • Present error: Replace the ECM. Refer to EC-77, "Procedure After Replacing ECM".
• Past error: Error was detected in the ECM branch line.
NG >> Repair the power supply and the ground circuit.
TCM Branch Line CircuitINFOID:0000000003533647
INSPECTION PROCEDURE
Harness connectorABS actuator and electric unit (control unit)
harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E15231G
E12511 Ye s
42G 15 Yes
ECM harness connector
Resistance (Ω)
Connector No. Terminal No.
E16 94 86 Approx. 108 – 132

Page 2199 of 3061

INFINITI QX56 2007 Factory Service Manual LAN-68
< SERVICE INFORMATION >[CAN]
TROUBLE DIAGNOSIS
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connecto

Page 2200 of 3061

INFINITI QX56 2007 Factory Service Manual TROUBLE DIAGNOSIS
LAN-69
< SERVICE INFORMATION >[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
• Past error: Error was detected in the ICC sensor branch line.
NG >> Repair the power supply and the ground ci

Load next 8 pages

Page: < prev 1-10 ... 2161-2168 2169-2176 2177-2184 2185-2192 2193-2200 2201-2208 2209-2216 2217-2224 2225-2232 ... 3064 next >

tow roof fuses deactivate airbag fuse box diagram keyless