Brake fluid level switch
The brake fluid level switch detects that the brake fluid level has dropped below the required (minimum) brake fluid level in the brake fluid expansion tank. The DSC control unit sends the signal of the bus system to the instrument panel. The instrument panel issues a Check Control message. Normal movements of the brake fluid (during braking or acceleration) in the brake fluid expansion tank will not normally lead to a Check Control message.
A reed contact is installed on the side of the brake-fluid reservoir. The reed contact transmits an electrical signal if the brake fluid level falls below a specified minimum level. The reed contact is closed while the brake fluid level is above the minimum mark.
| Item | Explanation |
|---|---|
| 1 | Brake servo |
| 2 | Electric vacuum pump |
| 3 | Brake fluid level switch |
| 4 | two-pin plug connection |
| 5 | Brake fluid expansion tank |