Circuit for Retarder solenoid valve
â–¶ How to fix
Contact the supplier ZF.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Fault in current value. The power source is activated or not activated, depending on the type of fault.
Possible cause
The control unit detects a fault in the circuit for the solenoid valve for the retarder, but cannot specify what the fault is.