312000164 - F046 ASR FUNCTION WILL NOT GO OFF

When the button for deactivating the ASR function is pressed "ASR switched off" is not displayed in the panel for 5 seconds and the LED in the button does not light up; the function is not deactivated
Test results
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the Examiner Plus or Smart diagnostic equipment to the diagnostic connector and check the following at the brake node in the errors ambient:- that there are no faults In the parameters ambient:- that the ASR button parameter changes status when the button in question is pressedMove on to Step 21. Presence of errors in the control unit2. The parameter does not change status1. Proceed as instructed by the diagnostic tester2. Move on to Step 3
2ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Keeping the diagnostic equipment connected carry out the active diagnosis of:- pump motor;- solenoidsEnd of diagnosisFault detected in one of the solenoid valvesReplace the electrohydraulic unit - ABS electronic control unit    Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT - R.R.
3SWITCH CHECKAll OKProblems encounteredOperation
Check the operation of the ASR switch checking that there is a short circuit with the button pressed and an open circuit with the button released    See E7023 ESP Move on to Step 4Switch defectiveReplace the ASR switch
4SWITCH CONNECTIONS CHECKAll OKProblems encounteredOperation
Check the continuity of the ASR switch circuit    See E7023 ESP End of diagnosisNo continuity/insulationRestore the correct connections    See E7023 ESP