Crankshaft position sensor (TFR) — replacement

1. Crankshaft position sensor (TFR) sends impulses to the RSM, on the basis of which the position of the crankshaft is determined. Based on the received signal, the control unit determines the ignition sequence and sends a spark to the spark plug of each cylinder. This impulse also serves as the basis for precise adjustment of ignition timing and determination of engine speed. Using this signal, the on-board diagnostic system determines the presence of misfires. The magnetic field of the sensor is excited when the sensing element passes through the cutout of the pulse ring located on the crankshaft. The distance from the sensor sensing element to the ring is approximately 1.3 mm. The magnetic field generated by the passage of the cutout is manifested by an alternating voltage signal sent by the sensor to the PCM. If the electronic unit does not receive a signal from the crankshaft position sensor, the ignition system does not turn on. The sensor is on the right (from the drive belt side) engine, near the timing belt or chain.

Replacement

Note: Every time after removing and installing the SKR sensor, you must reload the options parameters for it. If you do not reboot, a fault code corresponding to a misfire may be registered in the processor memory. If a code has been registered, take the car to a company station to reset the parameters of the SKR sensor.

2. Disconnect the negative cable from the battery.

3. Raise the vehicle and install vertical supports.

4. Disconnect the electrical connector from the sensor (see illustration).




5. Unscrew the mounting bolt and remove the crankshaft position sensor.

6. Installation is carried out in the reverse order of removal.