Hand Control Unit ECU - Signal implausible
â–¶ How to fix
Release HCU lever if applied. If fault is detected again replace HCU.
What you'll see
No driver-visible symptom recorded.
System reaction
HCU is not used, manual functions are not available. Red warning lamp.
Diagnostic depth
Detection
HCU is not in neutral area for a definite time
Possible cause
HCU is activated for too long or faulty HCU