Vehicle Speed Sensor (VSS)

VSS is located in transaxle extension housing. VSS generates 8 pulses per axle shaft revolution. PCM will interpret VSS input along with TPS closed throttle input.

These inputs allow PCM to differentiate between closed throttle decel and closed throttle idle (vehicle stopped) conditions. During deceleration, PCM controls Automatic Idle Speed (AIS) motor to maintain a desired manifold pressure value. During idle (vehicle stopped), PCM controls AIS motor to maintain a desired idle speed.