Pinpoint Test E : The Traction Control System Is Inoperative Or Cannot Be Disabled - Vehicles Not Equipped With A Message Center: Notes

Refer to Vehicle Dynamic Systems for schematic and connector information.

Normal Operation and Fault Conditions 

The driver deactivates the traction control system by pressing the traction control switch. The switch momentarily grounds the traction control switch input circuit to the ABS module. The ABS module continues to monitor for excessive wheel spin, but no longer takes any action when a traction event is detected.

The traction control OFF switch uses 2 circuits, one circuit is hardwired to the ABS module and the other circuit is ground. When the switch is pressed, the ABS module detects the ground signal and sends a message to the BCM over the HS-CAN to illuminate the traction control OFF indicator (sliding car OFF icon). The BCM, acting as a gateway, relays this message to the IPC over the MS-CAN. The IPC responds by illuminating the traction control OFF 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.

A short to ground in the ABS module hardwired circuit, an open in one or both of the circuits, an inoperative switch or an internal failure in the ABS module causes the traction control disable function to become inoperative.

If equipped, MyKey ® allows users to configure traction control to be either always on or selectable. If a MyKey ® restricted key is in use with the MyKey ® traction control feature configured to always on, traction control cannot be disabled. An admin key must be used to enable and disable traction control.

Possible Causes 

• A MyKey ® restricted key is in use
• Wiring, terminals or connectors
• Traction control switch
• ABS module