Brake Fluid Level Switch Test

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If both the ABS/VSA indicator, the brake system indicator, and the trailer stability assist warning come on at the same time, check the VSA system first (see GENERAL TROUBLESHOOTING INFORMATION ).

Disconnect the brake fluid level switch connector.
Check for continuity between the terminals (1) and (2) with the float in the down position and in the up position.
- Remove the brake fluid completely from the reservoir. With the float down, there should be continuity.
- Fill the reservoir with brake fluid to the MAX (upper) level (A). With the float up, there should be no continuity.
NOTE: If the parking brake switch and fluid level switch are OK, but the brake system indicator does not function, do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ).

Fig 1: Identifying Brake Fluid Level In Reservoir
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Reconnect the brake fluid level switch connector.