2751035 - F20 ABS WORKING IRREGULARLY

Irregular system operation detected.

		Results of the tests
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	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 2	Presence of error C1040	Check right front wheel speed sensor wiring
			Presence of error C1040	Check left front wheel speed sensor wiring
			Presence of error C1040	Check right rear wheel speed sensor wiring
			Presence of error C1040	Check left rear wheel speed sensor wiring
			Presence of error C1040	Check right front wheel speed sensor. Ensure the connections are not loose and the sensor is correctly positioned and adjusted.
			Presence of error C1040	Check left front wheel speed sensor. Ensure the connections are not loose and the sensor is correctly positioned and adjusted.
			Presence of error C1040	Check right rear wheel speed sensor. Ensure the connections are not loose and the sensor is correctly positioned and adjusted.
			Presence of error C1040	Check left rear wheel speed sensor. Ensure the connections are not loose and the sensor is correctly positioned and adjusted.
			Presence of error C1040	Continue according to the instructions for the diagnostic equipment
			Presence of error C1040	Change the brake system control unit
2	CHECKING BRAKE HYDRAULIC SYSTEM	All OK	Problems met	Operation
	Disconnect the ABS electrical connection and test the efficiency of the braking system with the aid of a service rig.	Continue to Step 3	Braking action not balanced	Overhaul the braking system
3	Continue as instructed by the tester	All OK	Problems met	Operation
	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 diagnosis	Fault persists	Replace the brake system hydraulic unit