Automatic Transaxle Output Speed Sensor (A/T OSS)
The vehicle A/T OSS is a magnetic inductive pickup that relays information about vehicle speed to the TCM. The TCM uses this information to control the following functions:
- Shift timing
- Line pressure
- TCC apply and release
The OSS mounts in the case at the speed sensor rotor, which is pressed onto the spur gear. An air gap of 0.1-1.3 mm (0.004-0.050 in) is maintained between the sensor and the teeth on the spur gear. The sensor consists of a permanent magnet surrounded by a coil of wire. As the differential rotates, the OSS generates an AC signal.