Principles Of Operation

Principles of Operation


Hydraulic Brakes

To diagnose hydraulic brake concerns, refer to Brakes and Traction Control. Testing and Inspection


Adjustable Pedals

The brake and accelerator pedals can be adjusted for a more comfortable driving position. The adjustable pedals may be connected to the memory system, if equipped, or they may be a stand alone system.


Without Memory Feature

The adjustable pedals without memory feature are controlled directly by the adjustable pedal switch and motor. The motor is attached to the LH side of the brake pedal and bracket assembly and controls the brake and accelerator pedals via 2 cables that allow both pedals to move together as an assembly. The pedals are adjusted by pressing the adjustable pedal switch in either the forward or rearward direction. Pressing the switch powers the adjustable pedal motor which then causes the pedals to move either toward the driver or away from the driver. The pedals can be adjusted with the ignition switch in the RUN, ACC or OFF position.


With Memory Feature

The adjustable pedals with memory feature are controlled by the Driver Seat Module (DSM). The DSM receives input from 1 of the 3 sources and then powers the adjustable pedal motor in the desired direction. The DSM also controls the driver seat position and the exterior mirror positions.

The DSM receives input for pedal position from the following 3 sources:

- The adjustable pedal switch
- The memory SET switch button 1 or 2
- The Remote Keyless Entry (RKE) transmitter

The pedals can be adjusted using the adjustable pedal switch any time the ignition switch is in the RUN, ACC or OFF position. To adjust the pedals using the memory SET switch buttons or the RKE transmitter, the transmission must be in PARK or NEUTRAL.

For information on the DSM and Memory Position Programming, refer to Seats. Programming and Relearning

Adjustable pedal position memory recall

The DSM recalls the preferred position of the adjustable pedals when the transmission is in PARK or NEUTRAL and either the RKE transmitter is activated or 1 of the 2 memory SET switch buttons is pressed. The DSM continually monitors pedal position by using a Hall-effect switch that is built into the pedal motor. The pedal positions remain in memory as long as the DSM retains power. When a memory position is recalled, the DSM powers the adjustable pedal motor and monitors the Hall-effect switch. When the stored memory position is reached, the DSM removes the power from the motors. If the DSM receives an adjustable pedal input during a memory recall function, the DSM will stop the recall and respond to the new pedal position input. The DSM is capable of setting DTCs for the memory adjustable pedal system if necessary.