Hill Descent Control Message Display

The hill descent control system maintains vehicle speed on a downhill grade at operating speeds between 3.2 kmh (2 mph) and 32.2 kmh (20 mph). The system goes into standby mode on a flat or uphill terrain. The system deactivates at speeds above 64.4 kmh (40 mph). During periods of sustained use, the hill descent control system may automatically deactivate in order to cool the braking system.

When the hill descent control switch is pressed, a ground signal is sent to the Powertrain Control Module (PCM). The Powertrain Control Module (PCM) then sends a message to the Anti-Lock Brake System (ABS) module requesting system activation. The Anti-Lock Brake System (ABS) module uses inputs from the Restraints Control Module (RCM) and wheel speed sensors to determine the mode of operation.

The Instrument Panel Cluster (IPC) receives the hill descent mode status message from the Anti-Lock Brake System (ABS) module. The message center also displays hill descent control messages to inform the driver they have entered or exited various states of the hill descent control function.