125000521 - F46 ASR FUNCTION WILL NOT GO OFF

When the ASR function deactivation button is pressed, the ASR deactivated message does not appear on the panel for 5 seconds and the button led does not come on; The function is not deactivated
Results of the tests
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the Examiner Plus or Smart diagnostic equipment to the diagnostic connector and check the following at the brake nodes in the errors ambient:

  • That there are no faults

In parameter mode:

  • taht the ASR button parameter changes status when the ASR button is pressed
Continue to Step 4There are errors in the control unitContinue according to the instructions for the diagnostic equipment
The parameter does not change stateContinue to Step 2
2SWITCH CHECKAll OKProblems metOperation
Check that the ASR switch is workingContinue to Step 3Faulty switchReplace ASR switch Op.    Op. 3350A10 ASR DISENGAGEMENT SWITCH - R R
3CHECK SWITCH CONNECTIONSAll OKProblems metOperation
Check the continuity of the ASR switch circuit See    See E7022 VDCContinue to Step 4Lack of continuityRestore the connections See    See E7022 VDC
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer present
The test is essential, as the braking system is a safety feature of the car
End of diagnosisFault persistsChange the brake system control unit Op.    Op. 3340A20 ABS ELECTRONIC CONTROL UNIT - R+R