Pedal Positioning System: Description and Operation

ADJUSTABLE PEDALS SYSTEM DESCRIPTION

GENERAL
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 position of the brake and accelerator pedals can be adjusted without compromising safety or comfort in actuating the pedals. Repositioning the pedals does not change the effort required for actuation.

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 brake and accelerator pedals. The pedal can be moved rearward (closer to the driver) or forward (away from driver). The brake pedal is moved on its activating lever to a position where the driver feels most comfortable.

The accelerator pedal is moved at the same time and the same distance as the brake pedal. The accelerator pedal adjustment screw is turned by a flexible shaft slaved off the brake adjustment screw.

Neither the pedal drive motor nor drive mechanism are subject to the mechanical stress of brake or accelerator application.

SYSTEM FEATURES
^ Range of Adjustment
The pedals may be adjusted up to 3 in. (75 mm)
^ Pedal Adjustment Speed 0.5 in./sec (12.5 mm/sec)
^ Pedal Adjustment Inhibitors
Pedal adjustment is inhibited when the vehicle is in reverse or when cruise control is activated.
^ Memory
An optional memory feature is available. This allows storing of one or two preferred pedal positions in the Adjustable Pedal Module (APM). A preferred position can be stored and recalled using the door-mounted switches.
The door-mounted switches activate the Driver Door Module (DDM). The DDM instructs the APM via the PCI bus to store the current pedal position.
A stored pedal position can be recalled (but not stored) using the Remote Keyless Entry (RKE).
^ Adjustable Pedal Feedback Message
The Electronic Vehicle Information Center (EVIC) will display a message when the APS is disabled. ie: "Adjustable Pedal Disabled-Cruise Control Engaged" or "Adjustable Pedal Disabled -Vehicle in Reverse".
^ Damage Prevention
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 1.5 seconds, it will cut power to the adjustable pedal motor.