Circuit Description

The pressure switch (for low-pressure warning) monitors brake fluid pressure inside of the hydraulic brake booster (HBB). When the brake fluid pressure decreases abnormally, the pressure switch (for low-pressure warning) is turned off and the brake fluid low-pressure warning signal is output to the M-ASTC-ECU. See Fig 1 .

Fig 1: Identifying Pressure Switch (For Low Pressure Warning) Circuit & Locating Connectors

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.