the locking of the torsion converter of the automatic transmission, the shifting of the automatic transmission, the opening and closing of the engine cooling fan, the cruising speed and other functions.
Can be magnetoelectric speed sensor output signal of the ac signal, also can be the hall type digital signal or photoelectric digital signal, the speed sensor is usually installed on the drive axle housing
or gearbox shell, the speed sensor signal lines are usually served in shielding coat, this is in order to eliminate has high voltage wire and car phone or other electronic equipment electromagnetic and radio frequency interference,
Used to ensure that electronic communication does not interrupt, to prevent the deterioration of driving performance
