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 3

• Check - main beam headlamps relay/main beam 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 2

• 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:

• left and right main beam headlamp fuses;
• main beam headlamps relay feed;
• connection between steering column switch unit and Body Computer;
• connection between Body Computer and engine compartment control unit;
• connections between engine compartment control unit and bulbs; bulbs earth : Wiring diagram E2012 MAIN BEAM

Move onto step 3

• Replace the fuses, then search for the cause of the problem

End of diagnosis

• Restore the connections : Wiring diagram E2012 MAIN BEAM

End of diagnosis

• Restore the earth to the bulbs : Wiring diagram E2012 MAIN BEAM

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

Move onto step 4

• Restore power supply : Wiring diagram E2012 MAIN BEAM

End of diagnosis

• Replace the Body Computer Op. 5505A32

End of diagnosis

Check that the stalk unit is working properly; in particular check the side lights switch

Move onto step 5

• Replace the steering column switch unit Op. 5550A12

End of diagnosis

Check that the fault is no longer present

Incorrect selection of diagnostic procedure

Incorrect selection of diagnostic procedure