Connect the Examiner diagnostic equipment to the diagnostic socket.

Check that there are no faults in the Body Computer

Check light operation while in active diagnosis mode

Move onto step 2

• Checking fog lamp electric circuit/relay

Move onto step 3

• Check individual lights

Move onto step 2

Check the condition of individual bulbs and lamps

Move onto step 3

• Change the bulb

End of diagnosis

• Change the bulb

End of diagnosis

• Repair or replace front light cluster Op. 5540B75

End of diagnosis

• Repair or replace front lights cluster Op. 5540B74

End of diagnosis

Check, in order:

• front fog lamp fuse
• fog lights relay.
• Engine bay control unit power supply
• Connections between body computer and engine bay control unit
• connections between engine bay control unit and bulbs;
• connections between body computer and fog lamp switch
• bulb earth Wiring diagram E2030 FOG LAMP

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 E2030 FOG LAMP

End of diagnosis

Check that the Body Computer is working properly, in particular the front fog lamps control function

Move onto step 5

• Replace the Body Computer

End of diagnosis

Check the operation of the fog lamp switch Wiring diagram E2030 FOG LAMP

Move onto step 6

• Replace the control panel Op. 5505A24

End of diagnosis

Check that the fault is no longer present

Incorrect selection of diagnostic procedure

Incorrect selection of diagnostic procedure