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Test C: TC Indicator Always On: Notes

  1. Perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
  2. Turn ignition on, engine off. Using scan tool, select DISPLAY DTC function Engine Control Module (ECM) and Transmission Control Module (TCM). If any DTCs are present, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no DTCs are present, go to next step.
  3. Turn ignition on, with engine off. Using scan tool, enter ABS/TCS data list. While monitoring TCS on/off switch status, press and hold TCS switch for 3 seconds, then 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  9 .
  4. Turn ignition off. Disconnect 31-pin EBCM connector C1. Install Breakout Box (J-39700) and Adapter (J-39700-280) to EBCM harness connector C1. Turn ignition switch on, with engine off. If TC indicator turns off, go to next step. If TC indicator remains illuminated, go to step  6 .
  5. Replace EBCM. See ELECTRONIC BRAKE CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING.
  6. Turn ignition off. Disconnect 26-pin instrument cluster connector. Using DVOM, measure resistance between breakout box terminals No. 20 and 19. If resistance is infinite, go to step  8 . If resistance is not infinite, go to next step.
  7. Repair short to ground in Brown/Yellow wire between instrument cluster and EBCM. After repairs, perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING.
  8. Diagnose instrument cluster. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. After repairs, perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING.
  9. Turn ignition off. Disconnect 31-pin EBCM connector C1. Install Breakout Box (J-39700) and Adapter (J-39700-280) to EBCM harness connector C1. Using DVOM, measure resistance between breakout box terminals No. 31 and 19. If resistance is infinite, go to step  5 . If resistance is not infinite, go to next step.
  10. Repair short to ground in Brown/Red wire between TCS on/off switch and EBCM. Also, check for a short in TCS on/off switch. After repairs, perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING.
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