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Home >> Buick >> 2001 >> Century Limited >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System With Traction Control System - DELPHI 7 >> Symptom Tests >> Test F: Traction Off Indicator Inoperative

Test F: Traction Off Indicator Inoperative

  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
  2. Install scan tool. Turn ignition on, with engine off. Using scan tool, observe TCS warning light parameter in the TCS data list or ETS warning light parameter in ETS data list. If scan tool displays OFF, go to next step. If scan tool does not display OFF, go to step  10.
  3. Turn ignition off. Turn ignition on, with engine off. Observe TRACTION OFF indicator on the Instrument Panel Cluster (IPC) during bulb check. If indicator light illuminates during the bulb check and then turn off, go to next step. If indicator light does not illuminate during the bulb check, go to step  11.
  4. Turn ignition off. Install scan tool. Turn ignition on, with engine off. Using scan tool, observe TCS switch parameter in the BCM data list. Activate traction control switch. If TCS switch parameter changes state, problem is intermittent. See INTERMITTENTS & POOR CONNECTIONS  under DIAGNOSIS & TESTING. If the state of TCS switch parameter does not change, go to next step.
  5. Turn ignition off. Disconnect traction control switch connector. Connect a fused jumper from signal circuit of traction control switch to ground circuit of traction control switch. Turn ignition on, with engine off. Using scan tool, observe TCS switch parameter. If scan tool displays ON, go to step  9. If scan tool does not display ON, go to next step.
  6. Check traction control switch signal circuit for open or high resistance. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to next step.
  7. Check traction control switch ground circuit for an open or high resistance. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to next step.
  8. Check for poor connections at BCM harness connector. Repair as necessary. After repairs, go to step  16. If connections are okay, go to step  12.
  9. Check for poor connections at traction control switch harness connector. Repair as necessary. After repairs, go to step  16. If connections are okay, go to step  13.
  10. Check for poor connections at EBCM harness connector. Repair as necessary. After repairs, go to step  16. If connections are okay, go to step  14.
  11. Check for poor connections at IPC harness connector. After repairs, go to step  16. If connections are okay, go to step  15.
  12. Replace BCM. Program replacement BCM. After replacing BCM, go to step  16.
  13. Replace traction control switch. After replacing switch, go to step  16.
  14. Replace EBCM. After replacing EBCM, go to step  16.
  15. Replace IPC. After replacing IPC, go to next step.
  16. Operate system to verify repair. If repair did not correct problem, go to step  2.
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