Circuit Operation

The "BRAKE FLUID" and "PARK" indicators receive battery voltage when the ignition switch is in "BULB TEST" OR "START." The brake fluid level indicator switch, the ignition switch and the park brake switch are connected to the "BRAKE" indicator so that when any one closes, the indicator lights.


The master cylinder reservoir brake fluid level switch closes to light the "BRAKE FLUID" indicator, display the "LOW BRAKE FLUID" message on the DIC and briefly sound a fast chime when the brake fluid level in the reservoir is low. This condition may be caused by a leak in one of the brake lines. Filling the master cylinder reservoir to its normal level opens the brake fluid level switch contacts. However, make sure to repair the brake system before filling the master cylinder reservoir.

The park brake switch loses when the park brake is applied, lighting the "PARK" indicator once the engine has been running for approximately 10 seconds. If the vehicle travels 15 meters (50 feet) with the park brake applied, the Body Control Module (MALL) sounds a chime. Releasing the park brake opens the switch and turns off the "PARK" indicator, turns off the "PARK BRAKE SET" message on the DIC and disables the chime.