125000519 - F20 ABS WORKING IRREGULARLY

The ABS warning light does not come on and system is observed to work irregularly.
Results of the tests
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the brake nodes:

  • For faults in error mode
  • In the parameters ambient, the plausibility of all the parameters
  • In the active diagnosis ambient, the operation of the ABS warning light
Continue to Step 2Presence of faultsContinue according to the instructions for the diagnostic equipment
The warning light does not come onContinue according to the instructions inSee table    See table K61 ABS WARNING LIGHT OFF / (DO NOT CARRY OUT INITIAL TEST)
2CHECKING BRAKE HYDRAULIC SYSTEMAll OKProblems metOperation
Disconnect the ABS electrical connection and test the efficiency of the braking system with the aid of a service rig.Continue to Step 3Braking action not balancedOverhaul the braking system
3CHECK 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 persistsReplace the brake system hydraulic unit Op.    Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT