Tachometer
â–¶ How to fix
Check the tachometer and the rotation speed sensor, including wiring and connectors. Check the voltage measurement on coordinator pin 18.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Tachometer circuit voltage has been above or below the permitted level.Fault code is generated if voltage on coordinator pin 18 has fallen below 2.5 V or exceeded approx. 20 V.
Possible cause
Short circuit to earth or to current carrying cable in the tachometer circuit.