Connect the Examiner to the diagnostic socket.

Verify:

• that there are no faults in the Body Computer
• the operation of the lights in active diagnosis.

Move onto step 2

• Check dipped headlamps maintenance relay/dipped headlamps electrical circuit

Move onto step 3

• Check individual lights.

Move onto step 2

Check the condition of individual bulbs and light units.

Move onto step 3

• Replace bulbs

End of diagnosis

• Repair or replace front lights cluster Op. 5540B75

End of diagnosis

• Repair or replace front lights cluster Op. 5540B74

End of diagnosis

Check, in order:

• right and left dipped headlamp fuses;
• dipped headlamp maintenance relay;
• connections between steering column switch unit and Body Computer;
• connections between Body Computer and dashboard control unit;
• connections between dashboard control unit and bulbs;
• bulbs earth : Wiring diagram E2011 DIPPED HEADLAMPS

Move onto step 4

• Replace the component involved (if a fuse is involved, search for the cause of the problem)

End of diagnosis

• Restore the connections : Wiring diagram E2011 DIPPED HEADLAMPS

End of diagnosis

Check that the stalk unit is working properly; in particular check the side lights switch Characteristic of working principle 5550 Warning and manoeuvring indicators

Move onto step 5

• Replace the steering column switch unit Op. 5550A12

End of diagnosis

Check that the Body Computer is supplied properly

Check that when an earth signal from stalk unit to Body is activated, an earth signal is emitted from the Body to drive the dipped beam headlamps relay: Wiring diagram E2011 DIPPED HEADLAMPS

Move onto step 6

• Restore the correct supply : Wiring diagram E2011 DIPPED HEADLAMPS

End of diagnosis

• Replace the Body Computer Op. 5505A32

End of diagnosis

Check that the fault is no longer present

Incorrect selection of diagnostic procedure

Incorrect selection of diagnostic procedure