The output shaft speed sensor measures the output shaft speed, which is read from the output shaft tone wheel. The Transmission Electronic Control Unit (TECU) compares these speeds to calculate the gear ratios of the main gearbox, auxiliary gearbox and overall gearbox.
What else does the output speed sensor do?
Function. The output speed sensor measures how fast a vehicle is moving and sends this information to other vehicle systems. Based on the engine speed, the transmission control unit determines the gear change, adjusts the torque converter and displays the vehicle speed in the speedometer.
Then the question arises, where is the speed sensor of the output shaft?
Note: The transmission speed sensor is located on the rear of a longitudinally mounted transmission. On gearboxes, the speed sensor is located on the long side of the output shaft. This would be the end of the gearbox facing the front of the engine.
Also, what are the symptoms of a bad speed sensor?
Here are the symptoms of a bad or defective gearbox speed sensor
- Hard or improper shifting. Without a valid speed signal from these sensors, the PCM cannot properly control the shifting of gears within the transmission.
- Cruise control not working.
- Check Engine Light is on.
What happens when a transmission speed sensor is faulty?
When symptoms of a faulty transmission speed sensor are present, the powertrain control module is unable to properly control the shifting of gears within the transmission. This can cause the transmission RPM to ramp up before the gear is engaged, or late transmission overdrive resulting in an inability to engage top gear.
How do you know if your transmission control module is faulty?
Some of the most common signs of a faulty transmission control module include: You have trouble downshifting when you slow down, stop, or try to downshift manually. Your transmission automatically shifts into neutral or another gear. There is a delay when you try to shift from one gear to the other.
How does the vehicle speed sensor work?
The output shaft speed sensor detects and sends the speed of the drive wheels Information back to the engine control unit. Together, these two shafts allow the wheels to spin at a controllable speed while keeping the engine running at a speed that provides efficient performance.