INFINITI QX56 2004 Factory Service Manual

LAN-148
[CAN]
CAN SYSTEM (TYPE 4)
Revision: August 20072004 QX56
Case 14
Check data link connector circuit. Refer to LAN-163, "Data Link Connector Circuit Check" .
PKIA8125E
PKIA8831E

CAN SYSTEM (TYPE 4)
LAN-149
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 15
Check steering angle sensor circuit. Refer to LAN-163, "Steering Angle Sensor Circuit Check" .
PKIA8126E
PKIA8832E

LAN-150
[CAN]
CAN SYSTEM (TYPE 4)
Revision: August 20072004 QX56
Case 16
Check front air control circuit. Refer to LAN-164, "Front Air Control Circuit Check" .
PKIA8127E
PKIA8833E

CAN SYSTEM (TYPE 4)
LAN-151
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 17
Check transfer control unit circuit. Refer to LAN-164, "Transfer Control Unit Circuit Check" .
PKIA8128E
PKIA8834E

LAN-152
[CAN]
CAN SYSTEM (TYPE 4)
Revision: August 20072004 QX56
Case 18
Check ABS actuator and electric unit (control unit) circuit. Refer to LAN-165, "ABS Actuator and Electric Unit
(Control Unit) Circuit Check" .
PKIA8129E
PKIA8835E

CAN SYSTEM (TYPE 4)
LAN-153
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 19
Check IPDM E/R circuit. Refer to LAN-165, "IPDM E/R Circuit Check" .
PKIA8130E
PKIA8836E

LAN-154
[CAN]
CAN SYSTEM (TYPE 4)
Revision: August 20072004 QX56
Case 20
Check CAN communication circuit. Refer to LAN-166, "CAN Communication Circuit Check" .
Case 21
Check IPDM E/R ignition relay circuit continuously sticks “OFF”. Refer to LAN-166, "IPDM E/R Ignition Relay
Circuit Check" .
PKIA8131E
PKIA8132E

CAN SYSTEM (TYPE 4)
LAN-155
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 22
Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to LAN-166, "IPDM E/R Ignition Relay
Circuit Check" .
Circuit Check Between TCM and ICC SensorUKS001NU
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and
harness side).
–Harness connector F33
–Harness connector E19
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect A/T assembly connector and harness connector F33.
2. Check continuity between A/T assembly harness connector F9
terminals 3 (W), 8 (R) and harness connector F33 terminals 12
(W), 11 (R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
PKIA8133E
3 (W) - 12 (W) : Continuity should exist.
8 (R) - 11 (R) : Continuity should exist.
PKIA6831E

LAN-156
[CAN]
CAN SYSTEM (TYPE 4)
Revision: August 20072004 QX56
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector.
2. Check continuity between harness connector E19 terminals 12
(W), 11 (R) and ICC sensor connector E42 terminals 2 (W), 3
(R).
OK or NG
OK >> Connect all connectors and diagnose again. Refer to
LAN-131, "
Work Flow" .
NG >> Repair harness.
Circuit Check Between ICC Sensor and ICC UnitUKS001PS
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check 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 terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC sensor connector and harness connector E34.
2. Check continuity between ICC sensor connector E42 terminals
2 (W), 3 (R) and harness connector E34 terminals 24 (W), 23
(R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ICC unit connector.
2. Check continuity between harness connector B40 terminals 24
(W), 23 (R) and ICC unit connector B13 terminals 14 (W), 5 (R).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to
LAN-131, "
Work Flow" .
NG >> Repair harness.12 (W) - 2 (W) : Continuity should exist.
11 (R) - 3 (R) : Continuity should exist.
PKIA8171E
2 (W) - 24 (W) : Continuity should exist.
3 (R) - 23 (R) : Continuity should exist.
PKIA8137E
24 (W) - 14 (W) : Continuity should exist.
23 (R) - 5 (R) : Continuity should exist.
PKIA8138E

CAN SYSTEM (TYPE 4)
LAN-157
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Circuit Check Between ICC Unit and Driver Seat Control UnitUKS001PT
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Disconnect ICC unit connector and driver seat control unit connector.
4. Check continuity between ICC unit connector B13 terminals 14
(W), 5 (R) and driver seat control unit connector P2 terminals 3
(W), 19 (R).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to
LAN-131, "
Work Flow" .
NG >> Repair harness.
Circuit Check Between Driver Seat Control Unit and Data Link ConnectorUKS001NV
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check 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 terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect driver seat control unit connector and harness connector B69.
2. Check continuity between driver seat control unit harness con-
nector P2 terminals 3 (W), 19 (R) and harness connector B69
terminals 51J (W), 52J (R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.14 (W) - 3 (W) : Continuity should exist.
5 (R) - 19 (R) : Continuity should exist.
PKIA8139E
3 (W) - 51J (W) : Continuity should exist.
19 (R) - 52J (R) : Continuity should exist.
PKIA6841E