2398797 - J30 WHEN IT RAINS, THE WINDSCREEN IS NOT CLEANED AUTOMATICALLY

With the ignition ON, the windscreen wipers do not work when there is water on the windscreen
If the vehicle is equipped with a rain sensor, the intermittent position corresponds, in reality, to the AUTO position, in other words, depending on the sensitivity setting the windscreen wipers are activated automatically if rain is detected.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Turn the key to the ON position, turn the ring nut for the steering column switch unit lever activating the side lights and check that they come on.Place the steering column switch unit lever for the windscreen wipers in a position other than the intermittent one and check that the windscreen wipers are activatedContinue to Step 1Not even the side lights come onRestore the correct electrical connections for the sensor See   E3020  WINDSCREEN WASH/WIPE . If necessary, replace the faulty components (if a fuse is involved, search for the causes of the problem first)
The windscreen wipers are not activated under any circumstancesSee table   J02 
1RAIN SENSOR ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation
Check that the connections between the Body Computer and the rain sensor and between the steering column switch unit and the Body Computer are correct See   E3020  WINDSCREEN WASH/WIPE Continue to Step 2Connections faultyRestore the correct electrical connections for the sensor See   E3020  WINDSCREEN WASH/WIPE . If necessary, replace the faulty components (if a fuse is involved, search for the causes of the problem first)
2CHECK ON STEERING COLUMN SWITCH UNITAll OKProblems metOperation
Check that the steering column switch unit is working properly in the bi-stable position, checking the continuity and the insulation in particularContinue to Step 3Steering column switch unit faultyReplace the stalk unit Op.   5550A12 
3REPLACING RAIN SENSORAll OKProblems metOperation
Replace the rain/dusk sensor Op. 5050B66and check that the fault disappearsEnd of diagnosisThe fault persistsRepair the original rain/dusk sensor or replace the Body Computer Op.   5505A32  Search for the fault starting from another symptom'