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Test D: Traction Off Indicator Inoperative With No DTCS Set (Grand PRIX): Notes

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1999 Pontiac Grand Prix, 1999 Pontiac Firebird, 1999 Oldsmobile Intrigue, 1999 Chevrolet Camaro, and 1998 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK. After performing diagnostic system check, go to next step.
  2. Turn ignition on, with engine off. Using scan tool, enter ABS/TCS data list. While monitoring TCS on/off switch status, press and release TCS on/off switch. If switch status changes as switch is pressed and released, go to next step. If switch status does not change as switch is pressed and released, go to step 8)  .
  3. Turn ignition off. Disconnect EBTCM connector C1. Install pinout box and adapter cable to EBTCM harness connector C1. Connect a fused jumper wire between pinout box terminals No. 18 and 15. Turn ignition switch on, with engine off. If TC indicator illuminates, go to next step. If TC indicator does not illuminate, go to step 5)  .
  4. Replace EBTCM.
  5. Turn ignition off. Disconnect instrument cluster connector. Using DVOM, measure resistance between pinout box terminal No. 18 and instrument cluster connector terminal No. L or A6 (Purple/White wire). If resistance is not 0-5 ohms, go to next step. If resistance is 0-5 ohms, go to step 7)  .
  6. Repair open or high resistance in Purple/White wire between instrument cluster and EBTCM.
  7. Diagnose instrument cluster. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
  8. Turn ignition off. Disconnect EBTCM connector C1. Install pinout box and adapter cable to EBTCM harness connector C1. Using DVOM, measure resistance between pinout box terminals No. 17 and 15 while an assistance presses and releases TCS on/off switch. If resistance is not 0-5 ohms, go to next step. If resistance is 0-5 ohms, go to step 4)  .
  9. Repair open or high resistance in Brown/White wire between TCS on/off switch and EBTCM. Also, check for an open in TCS on/off switch.
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