Vehicle Speed Sensor (VSS)

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

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