| | Test results |
| 1 | WIRING CONTINUITY CHECK | All OK | Problems encountered | Operation |
|---|
| Check the continuity of the cable for the speed signal between the body computer and the 14-way connector on the master headlamp (left side) See E3080 HEADLAMP AGLINMENT CORRECTOR | Move on to Step 2 | Connector not correctly fitted | Restore the connection |
| Wiring between body computer and master headlamp faulty | Restore or, if necessary, replace the wiring |
| 2 | SPEED SIGNAL CHECK | All OK | Problems encountered | Operation |
|---|
| Check the presence of the speed signal at the 14-way connector for the master headlamp by carrying out the test See Test 5540BN SPEED SIGNAL CHECK | Move on to Step 3 | | |
| 3 | HEADLAMP INTERNAL WIRING CHECK | All OK | Problems encountered | Operation |
|---|
| Check the continuity of the wiring between the master and slave headlamp 14-way connector and the control unit side connector by conducting the See Test 5540BO CHECK THE SPEED SIGNAL WIRING CONTINUITY INSIDE THE MASTER HEADLAMPthen move on to Step 4 | Move on to Step 4 | | |
| 4 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
|---|
| Check the fault has disappeared | End of diagnosis | The fault persists | Refit the headlamp removed previously and replace the master control unitOp. 5540B40 and/orOp. 5540B41 |