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Home >> Plymouth >> 1992 >> Voyager Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - Gasoline >> Computerized Engine Controls >> Input Devices >> Vehicle Speed Sensor (VSS)

Vehicle Speed Sensor (VSS)

The VSS generates 8 pulses per axle shaft revolution. SBEC interprets speed sensor input along with TPS closed throttle input.

This input enables SBEC to determine if a closed throttle deceleration or normal throttle idle (vehicle stopped) condition exists. During deceleration, SBEC controls Automatic Idle Speed (AIS) motor or Idle Speed Control (ISC) actuator to maintain a desired manifold pressure. During idle (vehicle stopped), SBEC controls AIS motor or ISC actuator to maintain a desired idle speed. SBEC also uses VSS signal to maintain set speed during cruise control operation.

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