Page 2297 of 3371
LAN-34
[CAN]
CAN SYSTEM (TYPE 1)
Revision: August 20072004 QX56
Case 10
Check data link connector circuit. Refer to LAN-46, "Data Link Connector Circuit Check" .
PKIA8059E
PKIA8151E
Page 2298 of 3371
CAN SYSTEM (TYPE 1)
LAN-35
[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-46, "Steering Angle Sensor Circuit Check" .
PKIA8060E
PKIA8152E
Page 2299 of 3371
LAN-36
[CAN]
CAN SYSTEM (TYPE 1)
Revision: August 20072004 QX56
Case 12
Check front air control circuit. Refer to LAN-47, "Front Air Control Circuit Check" .
PKIA8061E
PKIA8153E
Page 2300 of 3371
CAN SYSTEM (TYPE 1)
LAN-37
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 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" .
PKIA8062E
PKIA8154E
Page 2301 of 3371
LAN-38
[CAN]
CAN SYSTEM (TYPE 1)
Revision: August 20072004 QX56
Case 14
Check IPDM E/R circuit. Refer to LAN-48, "IPDM E/R Circuit Check" .
PKIA8063E
PKIA8155E
Page 2302 of 3371
CAN SYSTEM (TYPE 1)
LAN-39
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 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" .
PKIA8064E
PKIA8065E
Page 2303 of 3371
![INFINITI QX56 2004 Factory Service Manual LAN-40
[CAN]
CAN SYSTEM (TYPE 1)
Revision: August 20072004 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" INFINITI QX56 2004 Factory Service Manual LAN-40
[CAN]
CAN SYSTEM (TYPE 1)
Revision: August 20072004 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"](/manual-img/42/57034/w960_57034-2302.png)
LAN-40
[CAN]
CAN SYSTEM (TYPE 1)
Revision: August 20072004 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 (W), 8 (R) and harness connector F33 terminals 12
(W), 11 (R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
PKIA8066E
3 (W) - 12 (W) : Continuity should exist.
8 (R) - 11 (R) : Continuity should exist.
PKIA6831E
Page 2304 of 3371
![INFINITI QX56 2004 Factory Service Manual CAN SYSTEM (TYPE 1)
LAN-41
[CAN]
C
D
E
F
G
H
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L
MA
B
LAN
Revision: August 20072004 QX56
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector E34.
2. Check continuity between harness co INFINITI QX56 2004 Factory Service Manual CAN SYSTEM (TYPE 1)
LAN-41
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector E34.
2. Check continuity between harness co](/manual-img/42/57034/w960_57034-2303.png)
CAN SYSTEM (TYPE 1)
LAN-41
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
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-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 (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