DTC P0705: Transaxle Range Switch Circuit: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 Saturn SW2, 2001 Saturn SL2, 2001 Saturn SL1, 2001 Saturn SL, and 2001 Saturn SC2. However, it is still accessible from the selected car via links, so may be relevant.
Transaxle range switch determines which gear position has been manually selected. PCM determines this gear selection by detecting a combination of opens and grounds at 4 switch inputs of transaxle range switch. When a switch is open, PCM code input will be high (near ignition voltage). When switch is closed, PCM code input will be low (zero volts). Specific combination of highs and lows (opens and grounds at switch) for 4 code inputs at PCM denote which gear position has been selected. Only one combination is possible for each manual gear selected. DTC sets when PCM code input combination is not valid.