Circuit Operation
WARNING: This page is about a different car, the 2005 Mitsubishi Endeavor. However, it is still accessible from the selected car via links, so may be relevant.
The meter-ECU detects the brake fluid level switch ON/OFF and controls the brake warning light ON/OFF.
The TCL/ASC-ECU and the meter-ECU are connected each other via a CAN bus line, and the meter-ECU informs the TCL/ASC-ECU whether the brake fluid level switch is turned on or off.