No. 3 Brake System Warning Light Stay On: Notes

NO. 3 BRAKE SYSTEM WARNING LIGHT STAY ON DETECTION CONDITION AND POSSIBLE CAUSE

Troubleshooting item	Brake system warning lights stay on
Possible cause	Brake fluid amount is low. Brake fluid level sensor stuck on. Short to ground in fluid level sensor signal circuit. No connection at DSC HU/CM connector (When DSC HU/CM connector comes off, ABS warning light, brake system warning light, DSC indicator light, and DSC OFF indicator light illuminate.) DSC HU/CM detected malfunction. (Input and output device malfunction) DSC HU/CM detects low voltage in power supply. DSC HU/CM ground malfunction (When DSC HU/CM ground is not securely connected, ABS warning light, brake system warning light, DSC indicator light, and DSC OFF indicator light illuminate but diagnostic trouble code does not display.) DSC HU/CM does not operate. DSC HU/CM internal malfunction Instrument cluster detected malfunction
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.