Normal Operation

The Driver Seat Module (DSM) uses a Hall-effect switch attached to the pedal motor to identify the current pedal position. The DSM  sends a reference voltage along circuit LPP06 (YE/BU), through the Hall-effect switch and back to the DSM  along the signal return circuit RPP06 (GN).

When 1 or more of the following DTCs are set, the adjustable pedals will enter a "jog mode". When the pedals are in jog mode, the memory system recall will not function from either the Remote Keyless Entry (RKE) transmitter or the memory SET switch buttons. When the pedals are actuated using the adjustable pedal switch, the motor will move the pedals for one second in the direction selected regardless of the length of time the button is actually pressed.

• DTC B1987 (Pedal Forward/Rearward Motor Stalled) - This DTC is only set during a DSM  on-demand self test. During the self test, the adjustable pedal motor will be commanded to move forward and then rearward. If the motor encounters a hard stop while moving, the DSM  will attempt to move the pedals in the opposite direction. If the DSM  does not see any pedal movement via the Hall-effect switch during this attempt, DTC B1987 will be set and the adjustable pedal system will be disabled.
• DTC B1991 (Pedal Forward/Rearward Potentiometer Feedback Circuit Short to Battery) - If the DSM  detects a short to voltage on circuit LPP06 (YE/BU) during normal operation or an on-demand self test and without any pedal switch input, DTC B1991 will be set.
• DTC B2275 (Pedal Forward/Rearward Potentiometer Feedback Circuit Short to Ground) - If the DSM  detects a short to ground on circuit LPP06 (YE/BU) during normal operation or an on-demand self test and without any pedal switch input, DTC B2275 will be set.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Adjustable pedal motor