Vehicle Speed Sensor: Testing and Inspection

Diagnosis Of Vehicle Speed Sensor

Fault recognition of vehicle speed is performed during fuel cutoff.

A signal fault is detected if:
1. the condition fuel cut-off is valid for the time period threshold,
2. the engine speed is between two given thresholds,
3. simultaneously the vehicle speed is lower than threshold and,
4. engine temperature is greater than threshold.

Diagnosis of Vehicle Speed Sensor