Cab fan
â–¶ How to fix
Checking the power supply. Measurement point 2 in connector from auxiliary heater to vehicle cable harness and ground. From battery voltage - 1 V. Check connectors and wiring. If the fault code recurs, renew the control unit.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Impermissible voltage level on the output signal to the cab fan.
Possible cause
Short circuit in the output signal to the cab fan.