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Home >> Plymouth >> 2000 >> Neon L4-2.0L VIN C >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Transmission Position Sensor/Switch >> Description and Operation
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Transmission Position Sensor/Switch: Description and Operation

[1][2]PARK/NEUTRAL POSITION SWITCH - PCM INPUT

Park/Neutral Switch:




The [1][2]park/neutral position switch is located on the automatic transaxle housing.

Manual transaxles do not use [1][2]park/neutral switches. The switch provides an input to the PCM to indicate whether the automatic transaxle is in Park/Neutral, or a drive gear selection. This input is used to determine idle speed (varying with gear selection) and ignition timing advance. The park/neutral input is also used to cancel vehicle speed control. The park/neutral switch is sometimes referred to as the neutral safety switch.

The PCM delivers 8.5 volts to the center terminal of the [1][2]Park/Neutral switch. When the gear shift lever is moved to either the Park or the Neutral position, the PCM receives a ground signal from the Park/Neutral switch. With the shift lever positioned in Drive or Reverse, the Park/Neutral switch contacts open, causing the signal to the PCM to go high.
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