Vehicle speed signal
â–¶ How to fix
Check the impulse sensor including wiring and connectors.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The vehicle speed signal generated by the impulse sensor on the gearbox has been missing, or the voltage in the impulse sensor circuit has been above or below the permitted level.
Possible cause
Short circuit or open circuit. There may also be a fault in the impulse sensor.