Output Speed Sensor

Output speed sensor uses a magnetic pick-up coil to generate an AC voltage input signal when trigger teeth on output shaft pass the magnetic pick-up coil. See Figure . TCM uses input signal to determine output shaft speed. TCM compares output speed sensor signal against the input speed sensor signal to determine gear ratio and clutch slippage. Output speed sensor signal is also compared to Throttle Position (TP) sensor signal to determine transaxle shift points.

Output speed sensor signal is also used for determining vehicle speed. Vehicle speed signal is delivered from TCM to PCM. PCM delivers vehicle speed signal on CCD bus for use by BCM and other vehicle control modules.