Circuit Description

Vehicle speed information is provided to the Engine Control Module (ECM) by the voltage. Vehicle Speed Sensor (VSS) is a permanent magnet generator that is mounted in the transaxle and produces a pulsing voltage whenever vehicle speed is over 5 km/h (3 mph). The A/C voltage level and the number of pulses increase with vehicle speed. The converted signal is supplied to the instrument panel for speedometer/odometer operation and to the cruise control module and multi-function alarm module operation. The Diagnostic Trouble Code (DTC) will detect whether the CAN link is functional and the TCM is sending reliable output shaft data.