Infiniti F50. Manual - part 632

CAN SYSTEM (FOR ICC MODELS)

LAN-57

[CAN]

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CAN Communication Circuit Check

EKS003M8

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check following terminals and connector for damage, bend and loose connection.(control module-side,
control unit-side, unit-side, meter-side, sensor-side and harness-side)

●

TCM.

●

Combination meter.

●

Steering angle sensor.

●

ICC unit.

●

ICC sensor.

●

VDC/TCS/ABS control unit.

●

ECM.

●

Between TCM and ECM.

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect TCM connector and harness connector F105.

2.

Check continuity between TCM harness connector F103 termi-
nals 6 (LG/B) and 7(P/B).

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness between TCM and harness connector

F105.

3. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between TCM harness connector F103 terminals 6
(LG/B), 7 (P/B) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness between TCM and harness connector

F105.

6 (LG/B) – 7 (P/B) 

: Continuity should not exist.

PKIA0283E

6 (LG/B) – ground

: Continuity should not exist.

7 (P/B) – ground

: Continuity should not exist.

PKIA0284E

LAN-58

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CAN SYSTEM (FOR ICC MODELS)

4. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect combination meter connector, steering angle sensor connector and harness connector M6.

2.

Check continuity between Data Link Connector M31 terminals 6
(LG/B) and 3 (P/B).

OK or NG

OK

>> GO TO 5.

NG

>>

●

Repair harness between harness connector M6 and
harness connector M135.

●

Repair harness between harness connector M6 and
Data Link Connector.

●

Repair harness between harness connector M6 and
combination meter.

●

Repair harness between harness connector M6 and steering angle sensor.

5. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between Data Link Connector M31 terminals 6 (LG/
B), 3 (P/B) and ground.

OK or NG

OK

>> GO TO 6.

NG

>>

●

Repair harness between harness connector M6 and
harness connector M135.

●

Repair harness between harness connector M6 and
Data Link Connector.

●

Repair harness between harness connector M6 and combination meter.

●

Repair harness between harness connector M6 and steering angle sensor.

6. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect harness connector B63.

2.

Check continuity between harness connector B6 terminals 23
(LG/B) and 24 (P/B).

OK or NG

OK

>> GO TO 7.

NG

>> Repair harness between harness connector B6 and har-

ness connector B63.

6 (LG/B) – 3 (P/B) 

: Continuity should not exist.

PKIA0285E

6 (LG/B) – ground

: Continuity should not exist.

3 (P/B) – ground

: Continuity should not exist.

PKIA0286E

23 (LG/B) – 24 (P/B) 

: Continuity should not exist.

PKIA0287E

CAN SYSTEM (FOR ICC MODELS)

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7. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between harness connector B6 terminals 23 (LG/
B), 24 (P/B) and ground.

OK or NG

OK

>> GO TO 8.

NG

>> Repair harness between harness connector B6 and har-

ness connector B63.

8. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect harness connector B204 and ICC unit connector.

2.

Check continuity between harness connector B263 terminals 9
(LG/B) and 8 (P/B).

OK or NG

OK

>> GO TO 9.

NG

>>

●

Repair harness between harness connector B263
and harness connector B204.

●

Repair harness between harness connector B263
and ICC unit.

9. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between harness connector B263 terminals 9 (LG/
B), 8 (P/B) and ground.

OK or NG

OK

>> GO TO 10.

NG

>>

●

Repair harness between harness connector B263
and harness connector B204.

●

Repair harness between harness connector B263
and ICC unit.

10. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect ICC sensor connector, VDC/TCS/ABS control unit connector and harness connector E34.

2.

Check continuity between VDC/TCS/ABS control unit harness
connector E218 terminals 61 (LG/B) and 63 (P/B).

OK or NG

OK

>> GO TO 11.

NG

>>

●

Repair harness between harness connector E34 and
harness connector E224.

●

Repair harness between harness connector E34 and
VDC/TCS/ABS control unit.

●

Repair harness between harness connector E34 and
ICC sensor.

23 (LG/B) – ground

: Continuity should not exist.

24 (P/B) – ground

: Continuity should not exist.

PKIA0288E

9 (LG/B) – 8 (P/B) 

: Continuity should not exist.

PKIA0289E

9 (LG/B) – ground

: Continuity should not exist.

8 (P/B) – ground

: Continuity should not exist.

PKIA0290E

61 (LG/B) – 63 (P/B) 

: Continuity should not exist.

PKIA0280E

LAN-60

[CAN]

CAN SYSTEM (FOR ICC MODELS)

11. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between VDC/TCS/ABS control unit harness con-
nector E218 terminals 61 (LG/B), 63 (P/B) and ground.

OK or NG

OK

>> GO TO 12.

NG

>>

●

Repair harness between harness connector E34 and
harness connector E224.

●

Repair harness between harness connector E34 and
VDC/TCS/ABS control unit.

●

Repair harness between harness connector E34 and ICC sensor.

12. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect ECM connector.

2.

Check continuity between ECM harness connector F102 termi-
nals 174 (LG/B) and 171(P/B).

OK or NG

OK

>> GO TO 13.

NG

>> Repair harness between ECM and harness connector

F34.

13. 

CHECK HARNESS FOR SHORT CIRCUIT

Check continuity between ECM harness connector F102 terminals
174 (LG/B), 171 (P/B) and ground.

OK or NG

OK

>> GO TO 14.

NG

>> Repair harness between ECM and harness connector

F34.

14. 

ECM/TCM INTERNAL CIRCUIT INSPECTION

Check components inspection. Refer to 

LAN-61, "ECM/TCM INTERNAL CIRCUIT INSPECTION"

OK or NG

OK

>> Reconnect all connectors to perform “SELF-DIAG RESULTS” and “DATA MONITOR” for 

“ENGINE”, “VDC”, “ICC” and “A/T” displayed on CONSULT-II. Refer to the following:

●

EC-141, "DTC U1000, U1001 CAN COMMUNICATION LINE"

 for “ENGINE”

●

BRC-58, "Inspection 16 CAN Communications Lines, VDC/TCS/ABS Control Unit and Steering
Angle Sensor System"

 for “VDC”

●

ACS-70, "DTC 20 CAN COMM CIRCUIT"

 for “ICC”

●

AT-99, "DTC U1000 CAN COMMUNICATION LINE"

 for “A/T”

NG

>> Replace ECM and/or TCM.

61 (LG/B) – ground

: Continuity should not exist.

63 (P/B) – ground

: Continuity should not exist.

PKIA0291E

174(LG/B) – 171(P/B) 

: Continuity should not exist.

PKIA0279E

174(LG/B) – ground

: Continuity should not exist.

171(P/B) – ground

: Continuity should not exist.

PKIA0292E