Vehicle Speed Sensor Signal: Testing and Inspection

INSPECTION USING AN OSCILLOSCOPE (REFERENCE)




Vehicle speed signal (ATX)
PCM terminals
- 1J (+) - Negative battery terminal (-)

Oscilloscope setting
- 1 V/DIV (Y), 2.5 ms/DIV (X), DC range

Vehicle condition
- Vehicle speed is 32 km/h {20 mph}




Vehicle speed signal (MTX)
PCM terminals
- 1J(+) - 1N(-)

Oscilloscope setting
- 1 V/DIV (Y), 10 ms/DIV (X), DC range

Vehicle condition
- Vehicle speed is 10 km/h {6.2 mph}