INFINITI QX4 2005 Factory Service Manual

LAN-32
[CAN]
CAN SYSTEM (TYPE 1)
Revision: October 20052005 QX56
Case 8
Check display control unit circuit. Refer to LAN-45, "Display Control Unit Circuit Check" .
PKIB6666E
PKIA8149E

CAN SYSTEM (TYPE 1)
LAN-33
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 9
Check BCM circuit. Refer to LAN-45, "BCM Circuit Check" .
PKIB6667E
PKIA8150E

LAN-34
[CAN]
CAN SYSTEM (TYPE 1)
Revision: October 20052005 QX56
Case 10
Check data link connector circuit. Refer to LAN-46, "Data Link Connector Circuit Check" .
PKIB6668E
PKIA8151E

CAN SYSTEM (TYPE 1)
LAN-35
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 11
Check steering angle sensor circuit. Refer to LAN-46, "Steering Angle Sensor Circuit Check" .
PKIB6669E
PKIA8152E

LAN-36
[CAN]
CAN SYSTEM (TYPE 1)
Revision: October 20052005 QX56
Case 12
Check front air control circuit. Refer to LAN-47, "Front Air Control Circuit Check" .
PKIB6670E
PKIA8153E

CAN SYSTEM (TYPE 1)
LAN-37
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 13
Check ABS actuator and electric unit (control unit) circuit. Refer to LAN-47, "ABS Actuator and Electric Unit
(Control Unit) Circuit Check" .
PKIB6671E
PKIA8154E

LAN-38
[CAN]
CAN SYSTEM (TYPE 1)
Revision: October 20052005 QX56
Case 14
Check IPDM E/R circuit. Refer to LAN-48, "IPDM E/R Circuit Check" .
PKIB6672E
PKIA8155E

CAN SYSTEM (TYPE 1)
LAN-39
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 15
Check CAN communication circuit. Refer to LAN-48, "CAN Communication Circuit Check" .
Case 16
Check IPDM E/R ignition relay circuit continuously sticks “OFF”. Refer to LAN-49, "IPDM E/R Ignition Relay
Circuit Check" .
PKIB6673E
PKIB6674E

LAN-40
[CAN]
CAN SYSTEM (TYPE 1)
Revision: October 20052005 QX56
Case 17
Check IPDM E/R ignition relay circuit continuously sticks “ON”. Refer to LAN-49, "IPDM E/R Ignition Relay Cir-
cuit Check" .
Circuit Check Between TCM and Driver Seat Control UnitUKS0018I
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 (L), 8 (P) and harness connector F33 terminals 12
(L), 11 (P).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
PKIB6675E
3 (L) - 12 (L) : Continuity should exist.
8 (P) - 11 (P) : Continuity should exist.
PKIA6831E

CAN SYSTEM (TYPE 1)
LAN-41
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector E34.
2. Check continuity between harness connector E19 terminals 12
(L), 11 (P) and harness connector E34 terminals 24 (L), 23 (P).
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
(L), 23 (P) and driver seat control unit harness connector P2 ter-
minals 3 (L), 19 (P).
OK or NG
OK >> Connect all the connectors and diagnose again. Refer to
LAN-21, "
Work Flow" .
NG >> Repair harness.
Circuit Check Between Driver Seat Control Unit and Data Link ConnectorUKS0018J
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check following terminals and connector 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 (L), 19 (P) and harness connector B69 ter-
minals 51J (L), 52J (P).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.12 (L) - 24 (L) : Continuity should exist.
11 (P) - 23 (P) : Continuity should exist.
PKIA6832E
24 (L) - 3 (L) : Continuity should exist.
23 (P) - 19 (P) : Continuity should exist.
PKIA6840E
3 (L) - 51J (L) : Continuity should exist.
19 (P) - 52J (P) : Continuity should exist.
PKIA6841E