Pinpoint Test S : The Traction Control System Cannot Be Disabled Using The ESC (Electronic Stability Control) Off Switch: Notes
Refer to VEHICLE DYNAMIC SYSTEMS for schematic and connector information.
Normal Operation and Fault Conditions
When the driver deactivates traction control or ESC using the ESC OFF switch, the ABS module continues to monitor for vehicle instability and excessive wheel spin but no longer takes any action when either condition is detected.
The ESC 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 stability-traction control disabled 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 stability-traction control disabled indicator (sliding car OFF icon).
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.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C1109:64 | Vehicle Dynamics Control Switch: Signal Plausibility Failure | This DTC sets in continuous memory if the ABS module receives an invalid vehicle dynamics control switch input or if the input is received for too long. |
Possible Causes
- A MyKey® restricted key is in use
- Wiring, terminals or connectors
- ESC OFF switch
- ABS module