Eighty-Eight Royale FWD V6-3.8L VIN K (1996)
Transmission Position Switch/Sensor: Testing and Inspection
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 transmission shift control, ignition timing, EVAP canister purge, EGR and IAC valve operation. The combination of the four transaxle
range input states determine the PCM commanded shift pattern.
The input voltage level at the PCM is high (B+) 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 X=high voltage level, 0=low voltage level. The four parameters represent transaxle range switch
Parity, A, B, and C inputs respectively.
