PNP Switch: This parameter indicates the range selection of 3 speed or 4 speed automatic transmission equipped vehicles. The parameter will display Park/Neutral for the Park or Neutral position of the gear selector. The parameter will display In Gear for the Reverse, Drive, or Low positions of the gear selector.

TCC Brake Pedal Switch: This parameter is used only on 4 speed automatic transmission equipped vehicles. When the brake pedal is applied, the torque converter clutch (TCC) brake switch sends a signal to the shift lock control module in order to disengage the shift lock.