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Home >> Mazda >> 2023 >> 3 Select, 4D Hatchback >> Repair and Diagnosis >> Brakes >> Traction Control >> On-Board Diagnostic - Dynamic Stability Control (1 Of 2) >> DTC C0023-62: Brake Light [DSC HU/Control Module] >> Outline

DTC C0023-62: Brake Light [DSC HU/Control Module]: Outline

DTC C0023:62 (DSC HU/Control Module) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Brake light
Detection condition
  • The DSC HU/Control Module detects any of the following conditions.
    • Brake light status signal input by signal wiring harness and brake light illumination request signal output by CAN communication do not match
    • Master cylinder pressure exceeds 20 MPa {204 kgf/cm2 , 2901 psi} even though brake light status signal input by signal wiring harness is off
    • Brake light status signal input by signal wiring harness and brake light status signal input by CAN communication do not match
Fail-safe Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [DSC HU/Control Module (US)] .)
Possible cause
  • DTCs are stored in the body control module (BCM).
    • DTCs related to the electrical supply unit (ESU) are stored.
  • Electrical supply unit (ESU) connector or terminals malfunction
  • DSC HU/Control Module connector or terminals malfunction
  • Short to ground in electrical supply unit (ESU) brake signal circuit
  • Short to power supply in electrical supply unit (ESU) brake signal circuit
  • Open circuit in electrical supply unit (ESU) brake signal circuit
  • Electrical supply unit (ESU) malfunction
  • DSC HU/Control Module malfunction
G15737086Courtesy of MAZDA MOTORS CORP.