|  |  | Results of the tests | 
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation | 
|---|
|  | Check
that the navigation disk inside the player is positioned correctly | Continue to Step 
                              1 | The navigation disk is
inserted incorrectly | Restore correct operation | 
| 1 | CHECK OPERATION OF CD PLAYER | All OK | Problems met | Operation | 
|---|
|  | Check
that the two lights on the navigator device in the luggage compartment
are on | Continue to Step 
                              2 | The bottom light is flashing
or off | Restore
the operation of the CD player | 
| The top light is off | Continue to Step 
                               2 | 
| 2 | CHECK CD PLAYER SUPPLY | All OK | Problems met | Operation | 
|---|
|  | Check
the supply to the connector of the Maps CD player (
                               See   E4090  NAVIGATOR 
                              ) | Continue to Step 
                              3 | Faulty earth | Restore connections | 
| Faulty earth | Replace the fuse and search for the cause of the problem | 
| Faulty earth | Repair the earth | 
| 3 | CHECK OPERATION OF NAVIGATOR | All OK | Problems met | Operation | 
|---|
|  | Check
the operation of the navigator device on the I.C.S. | Continue to Step 
                              4 | I.C.S. device does not
work in navigation | Replace I.C.S. device
                               Op. 5080M12 | 
| 4 | HECK ON CORRECT OPERATION | All OK | Problems met | Operation | 
|---|
|  | Check
that the fault is no longer present | End of diagnosis | Fault persists | Search for the
fault starting from another symptom' |