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Home >> Mazda >> 2023 >> 3 Select, 4D Hatchback >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> On-Board Diagnostic - Vehicle Control Module (2 Of 3) >> DTC U0415-68: Error Signal Received From DSC HU/Control Module [Vehicle Control Module (Us)] >> Outline
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DTC U0415-68: Error Signal Received From DSC HU/Control Module [Vehicle Control Module (Us)]: Outline

DTC U0415:68 (VEHICLE CONTROL MODULE (US)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Error signal received from DSC HU/Control Module
Detection condition
  • When any of the following conditions is met.
    • The vehicle control module (VCM) receives the following error signals from the DSC HU/Control Module for 10 s.
      • Vehicle longitudinal acceleration
      • Brake fluid pressure from master cylinder
      • Yaw rate (vehicle turning angle speed)
      • Rotation speed of each wheel
    • The vehicle control module (VCM) detects that the brake signals between DSC HU/Control Module and the following modules did not match for 10 s during brake pedal operation while the vehicle is being driven.
      • PCM
      • Front radar sensor
      • body control module (BCM)
    • The vehicle control module (VCM) detects that a fail-safe is operated based on a deceleration request for 30 min while the vehicle is being driven.
Fail-safe (See DTC TABLE [VEHICLE CONTROL MODULE (US)] .)
Possible cause
  • CAN BUS No. 1 communication line error
  • DSC HU/Control Module malfunction
    • Brake fluid pressure sensor malfunction (built into DSC HU/Control Module)
    • ABS wheel-speed sensor error
    • Brake light illumination function malfunction
  • PCM malfunction
    • Brake switch malfunction
  • Electrical supply unit (ESU) malfunction
    • Brake light illumination function malfunction
    • Brake light malfunction
  • SAS control module malfunction
    • Low-G (XY) sensor error
    • Yaw rate sensor error
  • Front radar sensor malfunction
  • Vehicle control module (VCM) malfunction (built into body control module (BCM))
  • Body control module (BCM) malfunction
    • Brake switch malfunction
System wiring diagram Not applicable
Connector diagram Not applicable