Check Brake Fluid -37

The IPC supplies ignition voltage to the brake fluid level switch via circuit 333 (PPL). The IPC monitors this circuit at connector C2 terminal B4. If the brake fluid drops low enough, the switch closes and circuit 333 (PPL) is grounded via circuit 151 (BLK/WHT). The IPC detects this ground condition, and if the circuit remains grounded for at least 1 second, the IPC performs the following actions:
^ Displays this message
^ Sends a class 2 serial data message to the EBTCM
^ Illuminates the BRAKE indicator