Pinpoint Test I: The Hill Descent Control™ System Is Inoperative: Notes
Refer to Vehicle Dynamic Systems for schematic and connector information.
Normal Operation and Fault Conditions
Hill Descent Control™ can be activated by momentarily pressing the Hill Descent Control™ switch at speeds between 3 km/h (2 mph) and 16 km/h (10 mph), but the system stays in control up to 32 km/h (20 mph). At speeds between 32 km/h (20 mph) and 64 km/h (40 mph), Hill Descent Control™ does not set or maintain speeds. Hill Descent Control™ automatically disables itself above 64 km/h (40 mph).
When the switch is pressed, the IPC senses ground through the switch and sends a message to the ABS module along the HS-CAN to enable or disable the Hill Descent Control™ system.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C2809 | Hill Descent Control Switch Stuck | This DTC sets during the key cycle if the IPC senses a short to ground on the Hill Descent Control™ circuit, if the Hill Descent Control™ switch is pressed for longer than 30 seconds or if the Hill Descent Control™ switch is pressed during the on-demand self-test. |
Possible Causes
- Wiring, terminals or connectors
- Hill Descent Control™ switch
- IPC