5520AA IGNITION SWITCH EFFICIENCY CHECK 5520AC Steering fails to lock 5520AD Steering fails to unlock 5520AE Hardening of the key in the manoeuvre from STOP to MAR-ON 5520AF Hardening of the key in the manoeuvre from MAR-ON to START 5520AG The key does not return from START to MAR-ON 5520AH Failed and/or irregular instrument panel activation and possible failed and/or irregular operation of some services 5520AI Failed and/or irregular starting