Traction Control Indicator Inoperative

Circuit Description
The TC indicator is controlled by the EBTCM. The EBTCM supplies the ground to the TC indicator circuit to turn the indicator on. When the TC indicator circuit is not grounded at the EBTCM, the TC indicator remains off. When the EBTCM sees the traction control switch voltage go low, it turns the TC indicator on and disables traction control. The EBTCM harness connector contains a shorting bar for the TC indicator circuit. When the EBTCM connector is disconnected from the EBTCM, the shorting bar shorts the TC indicator terminal to ground turning on the indicator.

Diagnostic Aids
^ It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
^ Thoroughly inspect any circuitry that may be causing the complaint for the following conditions:
- Backed out terminals
- Improper mating
- Broken lock
- Improperly formed or damaged terminals
- Poor terminal-to-wiring connections
- Physical damage to the wiring harness

^ The following conditions may cause an intermittent malfunction:
- A poor connection
- Rubbed-through wire insulation
- A broken wire inside the insulation

^ If an intermittent malfunction exists refer to Intermittents and Poor Connections for further diagnosis.

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
3. This step checks for an internal EBTCM malfunction.
5. This step checks for an open in CKT XB105.