Output Shaft Speed (OSS) Sensor

Fig 1: Identifying Output Shaft Speed (OSS) Sensor

Courtesy of FORD MOTOR CO.

The OSS sensor is located in the transaxle housing above the rotor in the differential.

The OSS sensor is an inductive sensor which detects the vehicle speed by means of a rotor on the differential.

The signal is used for the following functions among other things:

• to determine the shift timing.
• to supply the vehicle speed input signal for the PCM.

If the OSS sensor fails, the signal of the TSS sensor is used as a substitute signal.