Transmission Position Sensor/Switch: Description and Operation

Transaxle Range Switch Valid Input Combinations:

The transaxle range switch is part of the transaxle Park/Neutral Position (PNP) switch mounted on the transaxle manual shaft. The 4 inputs from the transaxle range switch indicate to the PCM which position is selected by the transaxle selector lever. This information is used for the transmission shift control, the ignition timing, the EVAP canister purge, and the EGR and IAC valve operations. The combination of the 4 transaxle range input states determines the PCM commanded shift pattern. The input voltage level at the PCM is high when the transaxle range switch is open and low when the switch is closed to ground. The state of each input is represented on the scan tool as High voltage level, Low voltage level. The 4 parameters represent transaxle range switch Parity, A, B, and C inputs respectively. The valid transaxle range input combinations are shown in the Transaxle Range Switch Valid Input Combinations table.