P0720

DTC PO72O Output Speed Sensor Circuit Malfunction(For Electronically Controlled Transaxle)




CIRCUIT DESCRIPTION
The vehicle speed sensor outputs a 4-pulse signal for every revolution of the transaxle differential. After this signal has been converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the ECM.




DETECTING CONDITION




OSCILLOSCOPE PATTERN
- Waveform between terminals SP1 and E1 when vehicle speed is approx. 20km/h (12mph).
- The greater the vehicle speed, the greater the number of SP1 signals produced.




WIRING DIAGRAM










INSPECTION PROCEDURE