Pulse generator for Hyundai Accent Tagaz automatic transmission
The transmission pulse generator is a sensor that converts the rotational motion of the transmission output shaft into an electrical signal, which is then used by the transmission control module (TCM) to determine the speed and direction of rotation of the output shaft.
Location of the automatic transmission pulse generator
In the Hyundai Accent Tagaz, the automatic transmission pulse generator is located at the rear of the transmission, next to the input shaft speed sensor.
Operating principle of the automatic transmission pulse generator
The automatic transmission pulse generator consists of:
* A ring magnet attached to the transmission output shaft.
* Hall sensor located next to the ring magnet.
When the transmission output shaft rotates, the ring magnet creates a rotating magnetic field. The Hall sensor detects changes in the magnetic field and converts them into an electrical signal. The frequency and duty cycle of the electrical signal are proportional to the rotation speed and direction of rotation of the output shaft.
Malfunctions of the automatic transmission pulse generator
Common automatic transmission pulse generator problems include:
*Hall sensor failure: May result in incorrect or missing speed signals.
*Wiring fault: May cause intermittent or complete signal failures.
*Damage to ring magnet: May result in inaccurate or missing speed signals.
Symptoms of a faulty automatic transmission pulse generator
A faulty automatic transmission pulse generator can lead to the following symptoms:
* Difficulty shifting gears: The TCM may have incorrect output shaft speed information, resulting in incorrect gear selection.
*Slip: Incorrect rpm information can cause the transmission to slip.
*Vibration: Incorrect gear shifting or slipping can cause the vehicle to vibrate.
*Check Engine Light Illuminates: The TCM may set a trouble code indicating a problem with the automatic transmission speed sensor.
Diagnostics and repair of automatic transmission pulse generator
Diagnosis of a faulty automatic transmission pulse generator usually includes:
* Read trouble codes using OBD-II scanner.
* Check the presence of power supply and grounding at the sensor.
* Checking the sensor signal with an oscilloscope.
Repair usually involves replacing a faulty component such as a Hall effect sensor, wiring, or ring magnet.