Vehicle Speed Sensor

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The Vehicle Speed Sensor (VSS) is a Permanent Magnet (PM) generator mounted in transaxle/transmission. The VSS sends a pulsing AC voltage signal to PCM, which PCM converts into miles per hour (MPH). VSS signal is used by PCM in controlling TCC and shift solenoids. Signal may also be used for instrument cluster speedometer and cruise control system. Failure in VSS circuit should set a related diagnostic trouble code.