Transmission Controls

VEHICLE SPEED SENSOR
This sensor is a pulse generator type that detects revolution of the counter driven gear (vehicle speed) in the transmission case.

The pulse generator is a noncontact sensor consisting of a permanent magnet, coil and gears.

As the gear of the counter driven gear rotor turns, the magneflux from the permanent magnet varies and a voltage of the frequency corresponding to the rotor revolution occurs in the coil. This voltage is inputted to the TCM where TCM judges the counter driven gear revolution or the vehicle speed.





ENGINE SPEED SIGNAL
This signal is sent from ignition primary circuit.
TCM uses this signal as one of the factors to detect malfunction of TCC operation.