INFINITI QX56 2004 Factory Service Manual

LAN-108
[CAN]
CAN SYSTEM (TYPE 3)
Revision: August 20072004 QX56
Case 10
Check data link connector circuit. Refer to LAN-121, "Data Link Connector Circuit Check" .
PKIA8078E
PKIA8165E

CAN SYSTEM (TYPE 3)
LAN-109
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 11
Check steering angle sensor circuit. Refer to LAN-121, "Steering Angle Sensor Circuit Check" .
PKIA8079E
PKIA8166E

LAN-110
[CAN]
CAN SYSTEM (TYPE 3)
Revision: August 20072004 QX56
Case 12
Check front air control circuit. Refer to LAN-122, "Front Air Control Circuit Check" .
PKIA8080E
PKIA8167E

CAN SYSTEM (TYPE 3)
LAN-111
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 13
Check transfer control unit circuit. Refer to LAN-122, "Transfer Control Unit Circuit Check" .
PKIA8081E
PKIA8168E

LAN-112
[CAN]
CAN SYSTEM (TYPE 3)
Revision: August 20072004 QX56
Case 14
Check ABS actuator and electric unit (control unit) circuit. Refer to LAN-123, "ABS Actuator and Electric Unit
(Control Unit) Circuit Check" .
PKIA8082E
PKIA8169E

CAN SYSTEM (TYPE 3)
LAN-113
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 15
Check IPDM E/R circuit. Refer to LAN-123, "IPDM E/R Circuit Check" .
PKIA8083E
PKIA8170E

LAN-114
[CAN]
CAN SYSTEM (TYPE 3)
Revision: August 20072004 QX56
Case 16
Check CAN communication circuit. Refer to LAN-124, "CAN Communication Circuit Check" .
Case 17
Check IPDM E/R ignition relay circuit continuously sticks “OFF”. Refer to LAN-124, "IPDM E/R Ignition Relay
Circuit Check" .
PKIA8084E
PKIA8085E

CAN SYSTEM (TYPE 3)
LAN-115
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 18
Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to LAN-124, "IPDM E/R Ignition Relay
Circuit Check" .
Circuit Check Between TCM and Driver Seat Control UnitUKS0019W
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
–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 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.
PKIA8086E
3 (W) - 12 (W) : Continuity should exist.
8 (R) - 11 (R) : Continuity should exist.
PKIA6831E

LAN-116
[CAN]
CAN SYSTEM (TYPE 3)
Revision: August 20072004 QX56
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector E34.
2. Check continuity between harness connector E19 terminals 12
(W), 11 (R) and harness connector E34 terminals 24 (W), 23 (R).
OK or NG
OK >> GO TO 4.
NG >> Repair harness.
4. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect driver seat control unit connector.
2. Check continuity between harness connector B40 terminals 24
(W), 23 (R) and driver seat control unit harness connector P2
terminals 3 (W), 19 (R).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to
LAN-95, "
Work Flow" .
NG >> Repair harness.
Circuit Check Between Driver Seat Control Unit and Data Link ConnectorUKS0019X
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.12 (W) - 24 (W) : Continuity should exist.
11 (R) - 23 (R) : Continuity should exist.
PKIA6832E
24 (W) - 3 (W) : Continuity should exist.
23 (R) - 19 (R) : Continuity should exist.
PKIA6840E
3 (W) - 51J (W) : Continuity should exist.
19 (R) - 52J (R) : Continuity should exist.
PKIA6841E

CAN SYSTEM (TYPE 3)
LAN-117
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
3. CHECK HARNESS FOR OPEN CIRCUIT
Check continuity between harness connector M40 terminals 51J
(W), 52J (R) and data link connector M22 terminals 6 (W), 14 (R).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to
LAN-95, "
Work Flow" .
NG >> Repair harness.
Circuit Check Between Data Link Connector and IPDM E/RUKS0019Y
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 M31
–Harness connector E152
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector M31.
2. Check continuity between data link connector M22 terminals 6
(W), 14 (R) and harness connector M31 terminals 31G (W), 42G
(R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect IPDM E/R connector.
2. Check continuity between harness connector E152 terminals
31G (W), 42G (R) and IPDM E/R harness connector E122 termi-
nals 39 (W), 40 (R).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to
LAN-95, "
Work Flow" .
NG >> Repair harness.51J (W) - 6 (W) : Continuity should exist.
52J (R) - 14 (R) : Continuity should exist.
PKIA6834E
6 (W) - 31G (W) : Continuity should exist.
14 (R) - 42G (R) : Continuity should exist.
PKIA6835E
31G (W) - 39 (W) : Continuity should exist.
42G (R) - 40 (R) : Continuity should exist.
PKIA8140E