Infiniti F50. Manual - part 627

CAN SYSTEM (FOR VDC MODELS)

LAN-37

[CAN]

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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.

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.

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

23(LG/B) – ground

: Continuity should not exist.

24(P/B) – ground

: Continuity should not exist.

PKIA0288E

LAN-38

[CAN]

CAN SYSTEM (FOR VDC MODELS)

8. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect harness connector B204.

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.

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.

10. 

CHECK HARNESS FOR SHORT CIRCUIT

1.

Disconnect 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.

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.

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

61(LG/B) – ground

: Continuity should not exist.

63(P/B) – ground

: Continuity should not exist.

PKIA0291E

CAN SYSTEM (FOR VDC MODELS)

LAN-39

[CAN]

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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-39, "ECM/TCM INTERNAL CIRCUIT INSPECTION"

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 COMMUNICATION LINE"

 for “ENGINE”

●

AT-99, "DTC U1000 CAN COMMUNICATION LINE"

 for “A/T”

●

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

 for “VDC”

NG

>> Replace ECM and/or TCM.

Component Inspection

EKS003LJ

ECM/TCM INTERNAL CIRCUIT INSPECTION

●

Remove ECM and TCM from vehicle.

●

Check resistance between ECM terminals 174 and 171.

●

Check resistance between TCM terminals 6 and 7.

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

Unit

Terminal

Resistance value (

Ω

)

ECM

174 – 171

Approx. 108 - 132

TCM

6 – 7

PKIA0298E

LAN-40

[CAN]

CAN SYSTEM (FOR ICC MODELS)

CAN SYSTEM (FOR ICC MODELS)

PFP:18995

System Description

EKS003LX

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

Component Parts and Harness Connector Location

EKS003LY

SKIA3778E