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DTC U3003 16/U3003 17/U3003 1C: Power Supply System: Notes

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC U3003:16/U3003:17/U3003:1C (DYNAMIC STABILITY CONTROL) DETECTION CONDITION AND POSSIBLE CAUSE

DTC  U3003:16/U3003:17/U3003:1C  Power supply system 
DETECTION CONDITION 
  • U3003:16
    • The vehicle speed exceeds 3 km/h {2 mph}  and the voltage at DSC HU/CM terminal AG is less than 10 V  .
  • U3003:17
    • The voltage at DSC HU/CM terminal AG is 16 V or more  .
  • U3003:1C
    • Low ignition voltage (10 V or less)  is detected at the voltage monitor of the solenoid valve or motor monitor.
    • The ABS wheel speed sensor power supply for all four wheels decreases for a continuous 60 s with the voltage at DSC HU/CM terminal AG is 10 V or less  .
FAIL-SAFE FUNCTION 
  • Illuminates the ABS warning light, brake system warning light, TCS/DSC indicator light, and master warning light*.
  • Tire pressure monitoring system warning light illuminates after flashes.
  • Inhibits all of controls.

*: Vehicles with Smart City Brake Support (SCBS).
POSSIBLE CAUSE 
  • Malfunction of fuse (ABS/DSC M 50A or ABS/DSC S 30A)
  • Open or short circuit in wiring harness between DSC HU/CM terminal AG and battery
  • Open circuit in wiring harness between DSC HU/CM terminal A and body ground
  • Battery deterioration
  • Generator malfunction
  • Poor connection at connectors (female terminal)
G09785778Courtesy of MAZDA MOTORS CORP.