Pedal Positioning System: Description and Operation
ADJUSTABLE PEDALDESCRIPTION
The Adjustable Pedals System (APS) is designed to enable the fore and aft repositioning of the brake and accelerator pedals. This results in improved ergonomics in relation to the steering wheel for taller and shorter drivers. Being able to adjust the pedal positions also allows the driver to set steering wheel tilt and seat position to the most comfortable position. The effort required for pedal application will not change regardless of pedal position. The adjustable pedal system allows the pedals to adjust up to 3 inches (75 mm) at a rate of approximately 0.4 inch/seconds (9 mm/seconds). An adjustment switch is located on the left side of the steering column lower shroud. If the vehicle is equipped with Remote Keyless Entry (RKE), an optional memory feature is available.
The serviceable components of the APS are:
- Adjustable pedal assembly (includes motor, cables, pedals, gear box, sensor and module)
- Adjustable pedal module
- Adjustable pedal switch
- Pedal position sensor
OPERATION
Change of pedal position is accomplished by means of a motor driven screw. Operating the adjustable pedal switch activates the pedal drive motor. The pedal drive motor turns a screw that changes the position of the accelerator pedal. The motor also drives a cable connected to a gear box that changes the brake pedal position the same distance as the accelerator pedal. The pedals can be moved rearward (closer to the driver) or forward (away from driver). Each pedal is moved on its activating lever to a position where the driver feels most comfortable. The position and operation of the activating levers are not changed.
Pedal adjustment is inhibited when the vehicle is in reverse or when cruise control is engaged. The Electronic Vehicle Information Center (EVIC) will display a message when the Adjustable Pedal Module (APM) is disabled. i.e.: "Adjustable Pedal Disabled - Cruise Control Engaged" or "Adjustable Pedal Disabled - Vehicle in Reverse".
Foot pressure or debris can stall pedal adjustment. In order to avoid damage to system components during pedal adjustment, the APM will monitor pedal position sensor voltage. If the APM does not detect expected voltage change within 3 seconds, it will cut power to the adjustable pedal motor. An optional memory feature is available. This allows storing of one or two preferred pedal positions in the APS. A preferred position can be stored and recalled using the door-mounted switches. A stored pedal position can be recalled (but not stored) using the Remote Keyless Entry (RKE) if equipped with the memory feature.