|  |  | Results of the tests | 
| 1 | PROXI ALIGNMENT BY BODY COMPUTER | All OK | Problems met | Operation | 
|---|
|  | Connect
the diagnostic equipment, turn the ignition key ON and, in the active
diagnosis ambient at the Body Computer control unit, request the PROXI
alignment.The ABS control unit should not appear amongst the control units
for  which the latter is required | Continue to Step 4 | The ABS control unit requires PROXI
alignment | Carry out the PROXI alignment for the ABS control unit | 
| 2 | CONTROL UNIT COMPATIBILITY CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
that the design number of the control unit is compatible with the
spares number for the Model - Version-Series in question | Continue to Step 1 | The design number is not compatible | Continue to Step  3 | 
| 3 | RECALL CAMPAIGN CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
that there is no recall campaign in progress which involves changing
the ABS control unit | Continue to Step 4 | There are recall campaigns
in progress | Replace the ABS electro-hydraulic control unit with the new
one, compatible with the recall campaign   Op.   3340A12 | 
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation | 
|---|
|  | Turn
the key to the OFF position and then the ON position to ensure that
the control unit checks whether the PROXI alignment has been successful. Check that the fault is no longer present | End of diagnosis | The fault persists | Continue to Step  2 |