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Home >> Mazda >> 2021 >> CX-5 Signature >> Repair and Diagnosis >> Brakes >> Traction Control >> Symptom Troubleshooting - Dynamic Stability Control >> No. 3 Brake System Warning Light Stay On >> Notes
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No. 3 Brake System Warning Light Stay On: Notes

NO. 3 BRAKE SYSTEM WARNING LIGHT STAY ON POSSIBLE CAUSE

3 Brake system warning lights stay on
POSSIBLE CAUSE
  • Brake fluid amount is low.
  • Electric parking brake does not release.
  • Electric parking brake switch or brake fluid level sensor stuck on.
  • Short to ground in following circuit:
    • Between brake fluid level sensor and front body control module (FBCM)
  • No connection at DSC HU/Control Module connector (When DSC HU/Control Module connector comes off, ABS warning light, brake system warning light, TCS/DSC indicator light, and TCS OFF indicator light (without Off-road traction assist)/Off-road traction assist indicator light (with Off-road traction assist) illuminate.)
  • DSC HU/Control Module detected malfunction. (Input and output device malfunction)
  • DSC HU/Control Module detects low voltage in power supply.
  • DSC HU/Control Module ground malfunction (When DSC HU/Control Module ground is not securely connected, ABS warning light, brake system warning light, TCS/DSC indicator light, and TCS OFF indicator light (without Off-road traction assist)/Off-road traction assist indicator light (with Off-road traction assist) illuminate but diagnostic trouble code does not display.)
  • DSC HU/Control Module does not operate.
  • Front body control module (FBCM) detected malfunction.
  • DSC HU/Control Module internal malfunction
  • Instrument cluster detected malfunction