Infiniti F50. Manual — part 625
CAN SYSTEM (FOR VDC MODELS)
LAN-29
[CAN]
C
D
E
F
G
H
I
J
L
M
A
B
LAN
CHECK SHEET RESULTS (EXAMPLE)
PKIA0296E
LAN-30
[CAN]
CAN SYSTEM (FOR VDC MODELS)
INSPECTION
Proceed trouble diagnosis according to the check sheet results (example).
Case 1: Replace ECM.
Case 2: Replace VDC/TCS/ABS control unit.
Case 3: Replace TCM.
Case 4: Check harness between VDC/TCS/ABS control unit and steering angle sensor. Refer to
cuit Check Between VDC/TCS/ABS Control Unit and Steering Angle Sensor"
.
Case 5: Check harness between steering angle sensor and combination meter. Refer to
Check Between Steering Angle Sensor and Combination Meter"
.
Case 6: Check ECM circuit. Refer to
Case 7: Check VDC/TCS/ABS control unit circuit. Refer to
LAN-33, "VDC/TCS/ABS Control Unit Circuit
Case 8: Check steering angle sensor circuit. Refer to
LAN-34, "Steering Angle Sensor Circuit Check"
Case 9: Check combination meter circuit. Refer to
LAN-34, "Combination Meter Circuit Check"
Case 10: Check TCM circuit. Refer to
.
Case 11: Check CAN communication circuit. Refer to
LAN-35, "CAN Communication Circuit Check"
.
Circuit Check Between VDC/TCS/ABS Control Unit and Steering Angle Sensor
EKS003LB
1.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Check following terminals and connector for damage, bend and loose connection.(control unit-side, sen-
sor-side and harness-side)
●
VDC/TCS/ABS control unit.
●
Steering angle sensor.
●
Between VDC/TCS/ABS control unit and steering angle sensor.
OK or NG
OK
>> GO TO 2.
NG
>> Repair terminal or connector.
PKIA0297E
CAN SYSTEM (FOR VDC MODELS)
LAN-31
[CAN]
C
D
E
F
G
H
I
J
L
M
A
B
LAN
2.
CHECK HARNESS FOR OPEN CIRCUIT
1.
Disconnect VDC/TCS/ABS control unit connector and harness connector E224.
2.
Check continuity between VDC/TCS/ABS control unit harness
connector E218 terminals 61 (LG/B), 63 (P/B) and harness con-
nector E224 terminals 6 (LG/B), 5 (P/B).
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness.
3.
CHECK HARNESS FOR OPEN CIRCUIT
1.
Disconnect harness connector B263.
2.
Check continuity between harness connector B204 terminals 6
(LG/B), 5 (P/B) and harness connector B263 terminals 9 (LG/B),
8 (P/B).
OK or NG
OK
>> GO TO 4.
NG
>> Repair harness.
4.
CHECK HARNESS FOR OPEN CIRCUIT
1.
Disconnect harness connector B6.
2.
Check continuity between harness connector B63 terminals
9(LG/B), 8 (P/B) and harness connector B6 terminals 23(LG/B),
24 (P/B).
OK or NG
OK
>> GO TO 5.
NG
>> Repair harness.
61 (LG/B) – 6 (LG/B)
: Continuity should exist.
63 (P/B) – 5 (P/B)
: Continuity should exist.
SKIA3773E
6 (LG/B) – 9 (LG/B)
: Continuity should exist.
5 (P/B) – 8 (P/B)
: Continuity should exist.
SKIA3774E
9(LG/B) – 23(LG/B)
: Continuity should exist.
8(P/B) – 24(P/B)
: Continuity should exist.
PKIA0276E
LAN-32
[CAN]
CAN SYSTEM (FOR VDC MODELS)
5.
CHECK HARNESS FOR OPEN CIRCUIT
1.
Disconnect steering angle sensor connector.
2.
Check continuity between harness connector M6 terminals
23(LG/B), 24 (P/B) and steering angle sensor harness connec-
tor M52 terminals 4 (LG/B), 5 (P/B).
OK or NG
OK
>> Reconnect all connectors to perform “SELF-DIAG
RESULTS” and “DATA MONITOR” for “ENGINE”, “A/T”,
and “VDC”. Refer to the following:
●
EC-141, "DTC U1000, U1001 CAN COMMUNICA-
TION LINE"
for “ENGINE”
●
AT-99, "DTC U1000 CAN COMMUNICATION LINE"
for “A/T”
●
for “VDC”
NG
>> Repair harness.
Circuit Check Between Steering Angle Sensor and Combination Meter
EKS003LC
1.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Check following terminals and connector for damage, bend and loose connection. (sensor-side, meter-
side and harness-side)
●
Steering angle sensor.
●
Combination meter.
OK or NG
OK
>> GO TO 2.
NG
>> Repair terminal or connector.
2.
CHECK HARNESS FOR OPEN CIRCUIT
1.
Disconnect ECM connector, steering angle sensor connector and combination meter connector.
2.
Check continuity between steering angle sensor harness con-
nector M52 terminals 4 (LG/B), 5 (P/B) and combination meter
harness connector M41 terminals 15(LG/B), 16 (P/B).
OK or NG
OK
>> Reconnect all connectors to perform “SELF-DIAG
RESULTS” and “DATA MONITOR” for “ENGINE”, “A/T”,
and “VDC”. Refer to the following:
●
EC-141, "DTC U1000, U1001 CAN COMMUNICA-
TION LINE"
for “ENGINE”
●
AT-99, "DTC U1000 CAN COMMUNICATION LINE"
for “A/T”
●
for “VDC”
NG
>> Repair harness.
23(LG/B) – 4(LG/B)
: Continuity should exist.
24(P/B) – 5(P/B)
: Continuity should exist.
SKIA3775E
4(LG/B) – 15(LG/B)
: Continuity should exist.
5(P/B) – 16(P/B)
: Continuity should exist.
SKIA3776E
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