Ventilation fan and rear window heater cannot be started before 20 s after ignition on
Read the instructions below then start the fault diagnostic procedure.
Symptom: Ventilation fan and rear window heater cannot be started before 20 s after ignition on.
Ventilation fan and rear window heater cannot be started before 20 s after ignition on |
Fault symptom
Ventilation fan and rear window heater cannot be started before 20 s after ignition on.Diagnostic help
Ignition +54 can be checked in DICE using the diagnostics tool.If +54 is absent when +15 is present, bus message Ignition +54 ON after 20 seconds will be set.
ACC uses bus message Ignition +54 in order to cut out the ventilation fan when the engine is being started.