Pinpoint Test S : The Hill Descent Control™ System Is Inoperative Or Cannot Be Disabled: Notes
WARNING: This page is about a different car, the 2016 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Instrument Cluster for schematic and connector information.
Normal Operation and Fault Conditions
The Hill Descent Control™ switch is used to activate and deactivate the Hill Descent Control™ system. When the driver presses the Hill Descent Control™ switch, the IPC receives a ground signal from the switch and illuminates the Hill Descent Control™ indicator. The IPC sends a Hill Descent Control™ switch message to the GWM over the HS-CAN3 and the GWM relays this message to the ABS module over the HS-CAN2. The ABS module takes the necessary action depending on the switch inputs and traction control message.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0401:86 | Invalid Data Received From ECM/PCM "A": Signal Invalid | This DTC sets in continuous memory if the Hill Descent Control™ switch message from the IPC indicates the switch is stuck or held in place for longer than 30 seconds. This can be caused by a short to ground on the Hill Descent Control™ circuit or if there is an internal failure of the Hill Descent Control™ switch. |
Possible Causes
- A MyKey ® restricted key is in use
- Wiring, terminals or connectors
- Traction control switch
- IPC