Normal Operation and Fault Conditions
On vehicles equipped with a message center and steering wheel control switches, the traction control system status is relayed to the driver by the stability-traction control disabled indicator (sliding car OFF icon) in the IPC. When the driver deactivates traction control, the IPC sends a message to the BCM over the MSCAN indicating the driver has requested the traction control to be disabled. The BCM, acting as a gateway, relays this message to the ABS module over the HS-CAN. The ABS module continues to monitor for excessive wheel spin, but no longer takes any action when a traction event is detected.
After receiving the message from the BCM, the ABS module sends a message to the BCM over the HS-CAN to illuminate the stability-traction control disabled indicator (sliding car OFF icon). The BCM, acting as a gateway, relays this message to the IPC over the MSCAN. The IPC responds by illuminating the stability-traction control disabled indicator (sliding car OFF icon). Traction control remains deactivated until the driver changes the traction control state in the message center or until the ignition is cycled.