Traction Off Indicator Inoperative With No DTC Set

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TRACTION OFF INDICATOR INOPERATIVE WITH NO DTC SET


CIRCUIT DESCRIPTION
The Body Control Module (BCM) receives the input from the Traction Control Switch, the BCM then sends a class 2 message to the Electronic Brake and Traction Control Module (EBTCM) telling the EBTCM the state of the switch. The BCM supplies 12 volts to the Traction Control System (TCS) switch, when the TCS switch is depressed the BCM sees the voltage go low and sends the EBTCM the message that the TCS switch state has changed. When the EBTCM receives the message from the BCM that the switch state has changed it turns on or off Traction Control depending on its previous state.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
2. Checks if the Body Control Module (BCM) is receiving a Traction Control Switch input.
3. Checks if the Electronic Brake and Traction Control Module (EBTCM) is receiving a Traction Control Switch message from the BCM.
9. Checks if the BCM or the Traction Control Switch is at fault.