3308634 - F45 TCS FUNCTION DOES NOT GO OFF

When the ASR function deactivation button is pressed, the warning light on the instrument panel and the LED on the button do not come on, and the function is not deactivated.

		Results of the tests
0	PRELIMINARY CHECKS	All OK	Problems met	Operation
	Turn the ignition on and check that the instrument panel comes on.	Continue to Step 1	Instrument panel does not light up	Restore the connections ( See   E7020  ABS )
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Check that the TCS button parameter changes status when the ignition is switched on and the TCS button is pressed and held for 3 seconds	Continue to Step 4	The parameter does not change state	Continue to Step 2
2	CHECK SWITCH	All OK	Problems met	Operation
	Check the operation of the TCS switch	Continue to Step 3	Faulty switch	Replace TCS switch Op. 3350C10
3	CHECK SWITCH CONNECTIONS	All OK	Problems met	Operation
	Check continuity of TCS switch circuit ( See   E7021  ASR / TCS )	Continue to Step 4	Lack of continuity	Restore connections
4	CHECK ABS CONTROL UNIT	All OK	Problems met	Operation
	Check that the ABS control unit is working	Continue to Step 5	ABS control unit faulty	Replace ABS control unit Op. 5080C14
5	HECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'