P0720

WIRING DIAGRAM





CIRCUIT DESCRIPTION
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 in- putted to the Transmission Control Module where TCM judges the counter driven gear revolution or the vehicle speed.





REFERENCE
Oscilloscope waveforms
- Connect oscilloscope between terminals E25-12 (+) and E25-4 (-) of TCM connector connected to TCM and check VSS signal.

DTC CONFIRMATION PROCEDURE

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester.

1. Turn ignition switch OFF.
2. Clear DTC stored in TCM and ECM.
3. Drive vehicle at 20 mph, 30 km/h or more for longer than 30 sec.
4. Stop vehicle.
5. Check DTC and pending DTC.





INSPECTION