P1700

DTC: P1700 - Speed Sensor No.2 (No.2 Vehicle Speed Sensor) Circuit Malfunction

CIRCUIT DESCRIPTION








A rotor with built in permanent magnet is mounted on the output shaft. Every time the output shaft (and thus the rotor) makes one complete revolution, the permanent magnet activates the reed switch, which is built into the No.2 vehicle speed sensor, causing it to generate signal. This signal, which corresponds to the governor pressure in a conventional automatic transmission, is sent to the ECM, which uses it in controlling the shift points and the operation of the lock-up clutch.
This sensor outputs one pulse for every one revolution of the output shaft.
If the No.2 vehicle speed sensor malfunctions, the ECM uses input signals from the No.1 vehicle speed sensor as a back-up signal.





DETECTING CONDITION





Reference: Wave form between terminals SF2+ and SP2+ when vehicle speed is approx. 60 km/h (37 mph).





WIRING DIAGRAM








INSPECTION PROCEDURE