Automatic transmission output speed sensor 6T40
The 6T40 Transmission Output Speed Sensor is an important electronic component used in an automatic transmission.
Purpose:
* Measures the rotation speed of the automatic transmission output shaft.
* Provides information to the Transmission Control Module (TCM) about output shaft speed.
Location:
* Usually installed on the automatic transmission housing next to the output shaft.
Working principle:
* The sensor contains a Hall effect sensor which generates a voltage proportional to the output shaft speed.
* The voltage is sent to the TCM, which uses it to calculate the output shaft speed.
Functions:
* Helps the TCM accurately determine the gear ratio used by the transmission.
* Allows the TCM to control torque converter lockup.
* Diagnoses transmission problems such as clutch slipping or faulty solenoids.
Malfunctions:
* Dirty or damaged sensors.
* Malfunction of the power supply or ground circuit.
* Malfunction of the sensor itself.
Symptoms of malfunction:
*Transmission fault codes.
* Rough gear shifting.
* Slipping or vibration when shifting gears.
* Reduced fuel efficiency.
Diagnostics:
* Visual inspection of the sensor and its connections.
* Reading fault codes using a diagnostic scanner.
* Measuring voltage or resistance on the sensor using a multimeter.
Repair:
* Clean or replace dirty or damaged sensors.
* Check and, if necessary, repair power and ground circuits.
* Replace the faulty sensor.
Important:
*When working with the transmission output speed sensor, always follow the manufacturer’s procedures.
* Improper installation or maintenance may damage the transmission.