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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).