|  |  | Results of the tests | 
| 0 | PRELIMINARY CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
that the NAV CD is correctly insertd and recognized by the Connect. | Continue to Step 1 | NAV CD not inserted | Insert the NAV CD | 
| NAV CD not inserted | Replace the NAV CD | 
| 1 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation | 
|---|
|  | Connect
the Examiner diagnostic equipment to the diagnostic connector and
check that there are no faults at the Connect Node  in the errors ambient | Continue to Step 2 | Presence of faults | Continue following the instructions
for the diagnostic equipment. | 
| 2 | CHECKING ELECTRICAL EQUIPMENT | All OK | Problems met | Operation | 
|---|
|  | Remove
the Connect and check that the aerial connector is correctly inserted
in its housing.  See   E4091  CONNECT | Continue to Step 3 | Connector disconnected from
the Connect. | Insert the connector in its housing | 
| 3 | CHECKING ELECTRICAL EQUIPMENT | All OK | Problems met | Operation | 
|---|
|  | Check
the continuity/insulation of the connecting cable between the Connect
and the G.P.S. aerial  See   E4091  CONNECT | Continue to Step 4 | Aerial lead faulty | Renew the electrical connections See   E4091  CONNECT | 
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation | 
|---|
|  | Check
that the fault is no longer present | End of diagnosis | Fault persists | Replace the aerial support. |