2751035 - F20 ABS WORKING IRREGULARLY

Irregular system operation detected.
Results of the tests
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect an Examiner to the tester input and check the brake node for the following in error modes: In the errors ambient, that there are no faults 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 error C1040Check right front wheel speed sensor wiring
Presence of error C1040Check left front wheel speed sensor wiring
Presence of error C1040Check right rear wheel speed sensor wiring
Presence of error C1040Check left rear wheel speed sensor wiring
Presence of error C1040Check right front wheel speed sensor. Ensure the connections are not loose and the sensor is correctly positioned and adjusted.
Presence of error C1040Check left front wheel speed sensor. Ensure the connections are not loose and the sensor is correctly positioned and adjusted.
Presence of error C1040Check right rear wheel speed sensor. Ensure the connections are not loose and the sensor is correctly positioned and adjusted.
Presence of error C1040Check left rear wheel speed sensor. Ensure the connections are not loose and the sensor is correctly positioned and adjusted.
Presence of error C1040Continue according to the instructions for the diagnostic equipment
Presence of error C1040Change the brake system control unit
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
3Continue as instructed by the testerAll 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