NO.9 TCS OFF LIGHT STAYS ON MORE THAN 4 SECONDS WITH IGNITION SWITCH ON.


BME040343000224

9

TCS OFF light stays on more than 4 seconds with ignition switch ON.

[TROUBLESHOOTING HINTS]

• ABS/TCS HU/CM detects TCS OFF switch ON malfunction signal.

• TCS OFF light circuit shorted to ground.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT WIRING HARNESS BETWEEN ABS/TCS HU/CM AND DLC-2 FOR CONTINUITY AND SHORTS
• Perform DTC inspection.
• Is error message displayed regarding communication between ABS/TCS HU/CM and WDS or equivalent?
Yes
If a communication error message is displayed even after inspecting according to procedures displayed on the WDS or equivalent, go to Step 8.
No
Go to next step.
2
CHECK FOR DTCs IN ABS/TCS HU/CM
• Have DTCs been recorded in memory?
Yes
Perform inspection using appropriate DTC.
No
Go to next step.
3
INSPECT PID/DATA IN ABS/TCS HU/CM
• Inspect the following items using WDS or equivalent.
- TRAC_SW (TCS OFF switch)
• Is TRAC_SW ON displayed in WDS or equivalent?
Yes
Go to step 6 (TCS OFF switch system short to ground).
No
Go to next step.
*4
CHECK FOR SHORT TO GROUND IN ABS/TCS HU/CM
• Disconnect ABS/TCS HU/CM.
• Does TCS OFF light go out with ignition switch ON?
Yes
Replace ABS/TCS HU/CM (TCS OFF light circuit short to ground in ABS/TCS HU/CM).
No
Go to next step.
*5
VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN INSTRUMENT CLUSTER AND ABS/TCS HU/CM FOR SHORT TO GROUND) OR INSTRUMENT CLUSTER
• Disconnect instrument cluster (16-pin).
• Connect SST (adapter harness) (vehicle harness side only).
• Is there continuity between SST (adapter harness) connector Terminal O (L3, AJ) or Terminal J (MZR-CD (RF Turbo)) and ground.
Yes
Repair wiring harness between ABS/TCS HU/CM (Terminal O (L3, AJ) or Terminal J (MZR-CD (RF Turbo))) and instrument cluster.
No
Replace instrument cluster (short to ground in instrument cluster).
*6
INSPECT TCS OFF SWITCH
• Disconnect TCS OFF switch.
• Is TRAC_SW ON displayed on WDS or equivalent?.
Yes
Go to next step.
No
Replace TCS OFF switch (ON malfunction in TCS OFF switch).
*7
VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN ABS/TCS HU/CM AND TCS OFF SWITCH) OR ABS/TCS HU/CM
• Is there continuity between SST (adapter harness) connector Terminal P and ground?
Yes
Repair wiring harness between ABS/TCS HU/CM (Terminal P) and TCS OFF switch.
No
Replace ABS/TCS HU/CM (TCS OFF switch circuit short to ground in ABS/TCS HU/CM).
*8
INSPECT WIRING HARNESS BETWEEN ABS/TCS HU/CM AND DLC -2(DATA LINK CONNECTOR-2) FOR CONTINUITY
• Is there continuity between SST (adapter harness) connector Terminal T and DLC-2?
Yes
Go to next step.
No
Repair wiring harness between ABS/TCS HU/CM (Terminal T) and DLC-2.
*9
INSPECT WIRING HARNESS BETWEEN ABS/TCS HU/CM AND DLC-2 FOR SHORT TO B+
• Is voltage approximately 12 V at SST (adapter harness) connector Terminal T?
Yes
Repair wiring harness between ABS/TCS HU/CM (Terminal T) and DLC-2.
No
Go to next step.
*10
INSPECT WIRING HARNESS BETWEEN ABS/TCS HU/CM AND DLC-2 FOR SHORT TO GROUND
• Is there continuity between SST (adapter harness) connector Terminal T and ground?
Yes
Repair wiring harness between ABS/TCS HU/CM (Terminal T) and data link connector.
No
Replace ABS/TCS HU/CM (communication circuit malfunction in ABS/TCS HU/CM).