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This page last updated: September 21, 2014


Hill Start Assist
Hill Descent Control
Selec Speed Control


Selec-Terrain


  • The Hill Start Assist system assists the driver when starting a vehicle from a stop on a hill

  • The Hill Descent Control system maintains vehicle speed while descending hills during off-road driving situations and is available in 4WD LOW range

  • The Selec Speed Control feature allows the driver to travel at slow speeds on level ground, uphill or downhill without actively controlling either the throttle or brake


Hill Start Assist

The HSA system is designed to assist the driver when starting a vehicle from a stop on a hill. HSA will maintain the level of brake pressure the driver applied for a short period of time after the driver takes their foot off of the brake pedal. If the driver does not apply the throttle during this short period of time, the system will release brake pressure and the vehicle will roll down the hill. The system will release brake pressure in proportion to the amount of throttle applied as the vehicle starts to move in the intended direction of travel.


HSA Activation Criteria

The following criteria must be met in order for HSA to activate:

  • Vehicle must be stopped.
  • Vehicle must be on a 6% (approximate) grade or greater hill.
  • Gear selection matches vehicle uphill direction (i.e., vehicle facing uphill is in forward gear; vehicle backing uphill is in REVERSE gear).

HSA will work in REVERSE and all forward gears when the activation criteria have been met. The system will not activate if the vehicle is placed in NEUTRAL or PARK.

WARNING! There may be situations on minor hills with a loaded vehicle, or while pulling a trailer, when the system will not activate and slight rolling may occur. This could cause a collision with another vehicle or object. Always remember the driver is responsible for braking the vehicle.


Towing With HSA

HSA will provide assistance when starting on a grade when pulling a trailer.

WARNING!

  • If you use a trailer brake controller with your trailer, your trailer brakes may be activated and deactivated with the brake switch. If so, when the brake pedal is released, there may not be enough brake pressure to hold the vehicle and trailer on a hill and this could cause a collision with another vehicle or object behind you. In order to avoid rolling down the hill while resuming acceleration, manually activate the trailer brake prior to releasing the brake pedal. Always remember the driver is responsible for braking the vehicle.

  • HSA is not a parking brake. If you stop the vehicle on a hill without putting the transmission in PARK and using the parking brake, it will roll down the hill and could cause a collision with another vehicle or object. Always remember to use the parking brake while parking on a hill, and that the driver is responsible for braking the vehicle.



Hill Descent Control

(Four-Wheel Drive Models with MP3023 Two-Speed Transfer Case Only)

HDC is intended for low speed off road driving while in 4WD Low Range. HDC maintains vehicle speed while descending hills during various driving situations. HDC controls vehicle speed by actively controlling the brakes.


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 vehicle speed)


Enabling HDC

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

Activating HDC

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 speeds:

The set speed for HDC is selectable by the driver, and can be adjusted by using the paddle shifter's. The following summarizes the SSC set speeds:

  • P = No set speed. SSC may be enabled but will not activate.
  • 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 driverselected set speed and corresponding driving conditions.

  • HDC performance is influenced by the Terrain Select mode. This difference may be notable to the driver and may be perceived as a varying level of aggressiveness.

Driver Override:

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 being displayed.

Deactivating HDC

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.

Disabling HDC

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).

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 extinguish when HDC deactivates due to excess speed.
  • 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.
WARNING! HDC is only intended to assist the driver in controlling vehicle speed when driving in off road conditions. The driver must remain attentive to the driving conditions and is responsible for maintaining a safe vehicle speed.



Selec-Speed Control

(Four-Wheel Drive Models with MP3023 Two-Speed Transfer Case Only)

The Selec Speed Control feature allows the driver to travel at slow speeds on level ground, uphill or downhill without actively controlling either the throttle or brake


Selec Speed Control Switch

SSC is intended for off road driving in 4WD Low Range only. SSC maintains vehicle speed by actively controlling engine torque and brakes.

SSC 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 vehicle speed)


Enabling SSC

SSC is enabled by pressing the SSC switch, but the following conditions must also be met to enable SSC:

  • Driveline is in 4WD Low Range
  • Vehicle speed is below 5mph (8 km/h)
  • Parking brake is released
  • Driver door is closed
  • Driver is not applying throttle

Activating SSC

Once SSC is enabled it will activate automatically once the following conditions are met:

  • Driver releases throttle
  • Driver releases brake
  • Transmission is in any selection other than P
  • Vehicle speed is below 20 mph (32 km/h)

The set speed for SSC is selectable by the driver, and can be adjusted by using the paddle shifter's. The following summarizes the SSC set speeds:

  • P = No set speed. SSC may be enabled but will not activate.
  • 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 SSC the +/- paddle shifter input is used for SSC 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 SSC the transmission will shift appropriately for the driver-selected set speed and corresponding driving conditions.

NOTE: SSC performance is influenced by the Terrain Select mode. This difference may be notable to the driver and may be perceived as a varying level of aggressiveness.


Driver Override:

The driver may override SSC 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 whichever gear is displayed.

Deactivating SSC

SSC will be deactivated but remain available if any of the following conditions occur:

  • Driver overrides SSC 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 shifted to park.

    Disabling SSC

    SSC will deactivate and be disabled if any of the following conditions occur:

    • The driver presses the SSC switch
    • The driveline is shifted out of 4WD Low Range.
    • The parking brake is applied.
    • Driver door opens.
    • The vehicle is driven faster than 20 mph (32 km/h) for longer than 70 seconds.
    • The vehicle is driven greater than 40 mph (64 km/h) ( SSC exits immediately)


    Feedback to the driver: The instrument cluster has an SSC icon and the SSC switch has an LED which offers feedback to the driver about the state SSC is in.

    • The cluster icon and switch lamp will illuminate and remain on solid when SSC is enabled or activated. This is the normal operating condition for SSC.
    • The cluster icon and switch lamp will flash for several seconds then extinguish when the driver presses the SSC switch but enable conditions are not met.
    • The cluster icon and switch lamp will flash for several seconds then extinguish when SSC deactivates due to excess speed.


    WARNING! SSC is only intended to assist the driver in controlling vehicle speed when driving in off road conditions. The driver must remain attentive to the driving conditions and is responsible for maintaining a safe vehicle speed.





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