Circuit Description
WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.
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.