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 EBTCM telling the EBTCM the state of the switch. The BCM supplies 12 volts to the 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.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: The Traction Off Indicator (car icon) does not turn Off after the Instrument Panel Cluster (IPC) bulb check or after the Traction Control Switch is pressed to turn the Traction Control On after it was disabled. | ||||
1 | Was the Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |
2 |
Is DTC B2597 set in the Body Control Module? | -- | Go to DTC B2597 Traction Control System Switch Circuit in Body Control System | |
Using a scan tool in the Instrument Panel Cluster Special Functions attempt to turn OFF the Traction Lamp (car icon). Did the Traction Lamp (car icon) Turn OFF? | -- | |||
4 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module . Is the Replacement complete? | -- | Go to Diagnostic System Check | -- |
5 | Replace the Instrument Panel Cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the Replacement complete? | -- | Go to Diagnostic System Check | -- |
