Reference voltage
â–¶ How to fix
Check the wiring and the connector.Use SDP3 to check the value of the reference voltage.Check the voltage level from the vehicle.As a last resort, renew the ACC control unit. Calibrate the new control unit by deleting the fault codes.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The reference voltage is too high or too low.
Possible cause
The power supply to the analogue sensors is short circuited. Low voltage level. Fault in the ACC control unit