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Traction Control Indicator Inoperative

  1. Perform body rear end diagnostic system check. See ABS DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check, go to next step.
  2. Turn ignition off and install scan tool. Turn ignition on. Using scan tool, select BCM data list and read TCS SWITCH state as traction control switch is turned on and off. If TCS SWITCH state changes from ACTIVE to INACTIVE as traction control switch is turned on and off, go to next step. If TCS SWITCH state does change from ACTIVE to INACTIVE as traction control switch is turned on and off, go to step  7 .
  3. Using scan tool, enter ABS/ETS/TCS data list. Read TCS SWITCH state as traction control switch is turned on and off. If TCS SWITCH state changes from ACTIVE to INACTIVE as traction control switch is turned on and off, go to step  5 . If TCS SWITCH state does change from ACTIVE to INACTIVE as traction control switch is turned on and off, go to next step.
  4. Replace EBCM. See appropriate ANTI-LOCK BRAKES article in BRAKES. After replacement, go to step  14 .
  5. Turn ignition on. Using a scan tool, enter OUTPUT CONTROLS in IPC display. Use WOW mode to turn all instrument panel indicator lights ON and OFF. If TRAC OFF indicator light turns ON and OFF when commanded by scan tool, go to step  4 . If TRAC OFF indicator light does not turn ON and OFF when commanded by scan tool, go to next step.
  6. Suspect instrument panel cluster. Perform instrument panel cluster diagnostic system check. See appropriate INSTRUMENT PANELS article. After repair, go to step  14 .
  7. Turn ignition off and disconnect traction control switch harness connector. Using scan tool, enter BCM data list display and read TCS switch status. Install a jumper wire between TCS switch harness connector terminal "D" (Brown/White wire) and terminal "A" (Black wire). If TCS SWITCH state changes from ACTIVE to INACTIVE as jumper wire is installed and removed, go to next step. If TCS SWITCH state does not change from ACTIVE to INACTIVE as jumper wire is installed and removed, go to step  9 .
  8. Replace traction control switch. See appropriate ANTI-LOCK BRAKES article in BRAKES. After replacement, go to step  14 .
  9. Turn ignition switch off. Measure resistance of Black wire between traction control switch terminal "A" and good ground. If resistance is 0-2 ohms, go to step  11 . If resistance is not 0-2 ohms, go to next step.
  10. Repair open or high resistance in Black wire between traction control switch terminal "A" and ground. See WIRING DIAGRAMS  . After repair, go to step  14 .
  11. Turn ignition switch off. Disconnect BCM harness connector C3. Measure resistance of Brown/White wire between BCM harness connector C3 terminal B6 and traction control switch terminal "D". If resistance is 0-2 ohms, go to step  13 . If resistance is not 0-2 ohms, go to next step.
  12. Repair open or high resistance in Brown/White wire between BCM harness connector C3 terminal B6 and traction control switch terminal "D". See WIRING DIAGRAMS  . After repair, go to step  14 .
  13. Suspect BCM. Perform body control module diagnostic system check. See BODY CONTROL MODULE (BCM) DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. Repair/replace BCM as necessary. After repair, go to next step.
  14. Using scan tool, clear DTCs. Operate vehicle within conditions to set DTC. If DTC B2747 resets, return to step  2 . If DTC B2747 does not reset, system is okay.
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