361949 - K64 BRAKE FLUID WARNING LIGHT ON

The insufficient brake fluid level signal is sent by the special sensor to the Body Computer Node which makes it available via the B-CAN to the Instrument Panel Node. The Instrument Panel Node lights up the warning light and displays the insufficient brake fluid level message; if there is a fault the warning light displays the relevant message.
STEPOPERATIONS TO BE CARRIED OUTTEST RESULTS
1PRELIMINARY CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the brake fluid level warning light symbol/message is not present.Check that the electric parking brake is not activatedCheck that the insufficient brake fluid level message is not presentMove on to Step 1. Warning light faulty messageMove on to Step
2. Insufficient brake fluid messageMove on to Step
3. parking brake on3. release the parking brake
2BRAKE FLUID LEVEL TOP UPALL OKPROBLEMS ENCOUNTEREDACTION
Top up the brake fluid level and check that the warning light and message are no longer presentMove on to Step The warning light does not go outMove on to Step
3CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the Body Computer:in parameters ambient

  • the plausibility of the brake fluid parameter
Move on to Step parameter not plausibleMove on to Step
4BRAKE FLUID RESERVOIR SENDER UNIT CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the sender unit is working properlyMove on to Step sender unit not working properlyreplace the sender unit
5ELECTRICAL SYSTEM CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the continuity/insulation of the wiring between the sender unit and the Body Computer (Wiring Diagram ) E4010 INSTRUMENT PANEL Move on to Step electrical system open circuit or not insulatedRestore the electrical system (Wiring Diagram ) E4010 INSTRUMENT PANEL
6CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Connect the Examiner diagnostic equipment to the tester input and check the following at the Instrument Panel Node:in active diagnosis ambient

  • the operation of the brake fluid level warning light
Move on to Step the warning light is damaged / not flashingReplace instrument panel    See in Op. 5560B11 ANALOGUE CONTROL PANEL - R.R. or Replace
7CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer presentFault persistsReplace body computer    See in Op. 5505A32 BODY COMPUTER - R.R.