Traction Control Indicator Lamp: Description and Operation

Traction Control System Indicator(s)

LOW TRAC
The IPC illuminates the LOW TRAC indicator when the Electronic Brake Control Module (EBCM) detects a traction control event. The IPC receives a class 2 message from the EBCM requesting illumination.

PCS
The IPC illuminates the PCS indicator when the Electronic Brake Control Module (EBCM) detects a malfunction in the Precision Control System (PCS). The IPC receives a class 2 message from the EBCM requesting illumination of both the PCS indicator and the TRAC OFF indicator. The EBCM disables both the precision control system and the traction control system.

TRAC OFF
The IPC illuminates the TRAC OFF indicator when the following occurs:
^ The Electronic Brake Control Module (EBCM) inhibits the traction control system due to a malfunction in the traction control system or the Precision Control System (PCS). The IPC receives a class 2 message from the EBCM requesting illumination.
^ The Body Control Module (BCM) detects that the traction control switch has been pressed (signal circuit is low). The BCM sends a class 2 message to the EBCM in order to disable traction control. The IPC receives a class 2 message from the EBCM requesting illumination.