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Home >> Land Rover >> 2013 >> Range Rover Base >> Repair and Diagnosis (Single Page) >> Brakes >> Brakes Control Systems >> Brake Controls -- Range Rover/L405 >> Brake Controls >> Braking Control System (Description And Operation) >> Description And Operation >> Operation >> All Terrain Progress Control

All Terrain Progress Control

The All Terrain Progress Control (ATPC) can help the driver to maneuver on slippery surfaces. The system operates in either a forward or a reverse direction at low speeds, for example, pulling away from standstill, ascending or descending an incline, and driving on unstable/slippery driving surfaces.

The ATPC switch illuminates when enabled and a warning lamp illuminates in the Instrument Cluster (IC). There is also a confirmation message in the message center of the IC.

When ATPC is disabled a confirmation message is displayed in the IC and the switch and IC indications are extinguished.

When enabled, ATPC defaults to descent control mode, the system only limits the vehicle's downhill speed, using the brakes.

When ATPC enters in to descent control mode the ATPC Descent Braking Only  message is displayed in the message center to confirm.

Once full function has been activated the driver can adjust the target speed from a minimum of 1.8 km/h (1.2 mph) in low range and 3.6 km/h (2.2 mph) in high range. The ATPC maintains these speeds unless the accelerator or brake is pressed or the SET+  button on the steering wheel is operated.

When the SET+  on the steering wheel is operated, a confirmation message ATPC Speed Set  is displayed on the IC.

Once a set speed has been selected ATPC will endeavor to maintain that target speed over any terrain that lies in front (or behind if R is selected) of the vehicle. The ABS control module controls the amount of brake torque and engine torque at all times to maintain the vehicle speed selected, overcome obstacles, negotiate any inclines or descents and ensure as smooth an operation as possible. The set speed can be adjusted at any time. The resume 'RES' switch can be used to re-adopt the previous set speed after driver braking.

ATPC works in conjunction with Hill Start Assist, launches on inclines are therefore part of the ATPC benefits.

NOTE:
  • The driver's seat belt must be buckled and all of the doors must be completely closed to enable ATPC to enter into full function mode. If these conditions are not met, a message is displayed in the message center.
  • When the vehicle is stationary, press and hold the brake pedal while using the SET+ button
  • If the vehicle's speed exceeds 30 km/h (19 mph), ATPC operation is suspended. ATPC is then in standby mode, until the vehicle's speed is less than 30 km/h (18.6 mph). An ATPC override message is displayed in the message center.
  • If the vehicle's speed exceeds 80 km/h (50 mph), ATPC is disabled. An ATPC off message is displayed in the message center. If required, ATPC will have to be switched on again.
  • If an ATPC fault is detected, an ATPC not available message is displayed in the message center when the ATPC button is pressed. In this event consult a retailer/authorized repairer.
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