Originally Posted by Gravity
In my user guide it refers to the DVD..
That's very bloody helpful isn't it.
Hill Descent Control
HDC has three states:
1. Off (feature is not enabled and will not activate).
2. Enabled (feature is enabled and ready but activation
conditions are not met, or driver is actively overriding
with brake or throttle application).
3. Active (feature is enabled and actively controlling
HDC is enabled by pressing the HDC switch, but the
following conditions must also be met to enable HDC:
• Driveline is in 4WD Low Range
• Vehicle speed is below 5mph (8 km/h)
• Parking brake is released
• Driver door is closed
Once HDC is enabled it will activate automatically if
driven down a grade of sufficient magnitude (greater
than approximately 8%). The set speed for HDC is
selectable by the driver, and can be adjusted by using the
paddle shifter. The following summarizes the HDC set
• P = No set speed. HDC may be enabled but will not
• R = 0.6 mph (1 km/h)
• N = 1.2 mph (2 km/h)
• 1st = 0.6 mph (1 km/h)
• 2nd = 1.2 mph (2 km/h)
• 3rd = 1.8 mph (3 km/h)
• 4th = 2.5 mph (4 km/h)
• 5th = 3.1 mph (5 km/h)
• 6th = 3.7 mph (6 km/h)
• 7th = 4.3 mph (7 km/h)
• 8th = 5.0 mph (8 km/h)
NOTE: During HDC the +/- paddle shifter input is used for HDC target speed selection and will put the transmission into ERS but will not affect the gear chosen by the transmission unless in Driver Override. During HDC the transmission will shift appropriately for the driver selected set speed and corresponding driving conditions.
The driver may override HDC activation with throttle or brake application at any time. While in driver override the transmission will be in ERS which is a top gear limiter and the vehicle will shift from 1st through the gear that is
HDC will be deactivated but remain available if any of the following conditions occur:
• Driver overrides HDC set speed with throttle or brake application.
• Vehicle speed exceeds 20 mph (32 km/h) but remains below 40 mph (64 km/h).
• Vehicle is on a downhill grade of insufficient magnitude (less than approximately 8%), is on level ground, or is on an uphill grade.
• Vehicle is shifted to park.
HDC will deactivate and be disabled if any of the following conditions occur:
• The driver presses the HDC switch.
• The driveline is shifted out of 4WD Low Range.
• The parking brake is applied.
• Driver door opens.
• The vehicle is driven greater than 20 mph (32 km/h)
for greater than 70 seconds.
• The vehicle is driven greater than 40 mph (64 km/h)
(HDC exits immediately).
Feedback to the driver:
The instrument cluster has a HDC icon and a HDC switch which has an LED which offers feedback to the driver about the state HDC is in.
• The cluster icon and switch lamp will illuminate and remain on solid when HDC is enabled or activated. This is the normal operating condition for HDC.
• The cluster icon and switch lamp will flash for several seconds then extinguish when the driver presses the HDC switch but enable conditions are not met.
• The cluster icon and switch lamp will flash for several seconds then
• The cluster icon and switch lamp will flash when HDC deactivates due to overheated brakes. The flashing will stop and HDC will activate again once the brakes have cooled sufficiently.