Trac Off
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
The IPC illuminates the TRAC OFF indicator when any of the following occur:
- The electronic brake control module (EBCM) inhibits the traction control system due to a malfunction in the traction control system. The IPC receives a class 2 message from the EBCM requesting illumination. The IPC sends a class 2 message to the radio in order to activate an audible warning.
- The IPM detects that the traction control switch is pressed. The IPC receives a class 2 message from the IPM requesting illumination.
- The IPC receives a class 2 message from the EBCM requesting illumination of the ABS indicator.
- The IPC detects a loss of class 2 communications with the EBCM, and the discrete back-up ABS signal circuit is high.
- The IPC performs the displays test at the start of each ignition cycle. The indicator is illuminated for approximately 5 seconds.