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Home >> Mazda >> 2022 >> MX-5 Miata RF Club >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> On-Board Diagnostics - Electric Vacuum Pump (EVP) >> DTC U3003-16/U3003-17: EVP Control Unit Power Supply Low Input [EVP Control Unit] >> Notes

DTC U3003-16/U3003-17: EVP Control Unit Power Supply Low Input [EVP Control Unit]: Notes

DTC U3003-16/U3003-17: (EVP CONTROL UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

DTC U3003:16 EVP control unit power supply low input
U3003:17 EVP control unit power supply high input
DETECTION CONDITION
  • DTC U3003:16
    • The power supply voltage for the EVP control unit is 8.3 V or less for a continuous 0.1 s.
  • DTC U3003:17
    • The power supply voltage for the EVP control unit is 17.4 V or more for a continuous 0.1 s.
FAIL-SAFE FUNCTION
POSSIBLE CAUSE
  • DTC is stored in PCM
  • Battery malfunction
  • Generator malfunction
  • Fuse (EVPS 30A) malfunction
  • Short to ground or open circuit in wiring harness between battery and EVP control unit terminal A
  • Open circuit in wiring harness between EVP control unit terminal G and body ground
  • Poor connection at each connector
  • EVP control unit malfunction
G14588896Courtesy of MAZDA MOTORS CORP.