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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> On-Board Diagnostic [Audio] >> DTC: U3003:16, 09:Er20 [AUDIO] >> Notes

DTC: U3003:16, 09:Er20 [AUDIO]: Notes

DTC U3003:16, 09:Er20 Audio unit power supply voltage is low
DETECTION CONDITION  Audio unit power supply voltage of less than 10 V  is detected continuously for 10 s  .
FAIL-SAFE FUNCTION  -
POSSIBLE CAUSE 
  • PCM DTC is stored
  • Battery malfunction
  • Generator malfunction
  • Audio unit connector or terminals malfunction
  • Open circuit or short to ground in audio unit power supply circuit
    • Short to ground in wiring harness between the following terminal:
      • Audio unit terminal 1R-Ignition switch (ACC)
      • Audio unit terminal 1B-Battery positive terminal
    • MIRROR 7.5 A fuse malfunction
    • ROOM 15 A fuse malfunction
    • Open circuit in wiring harness between the following terminal:
      • Audio unit terminal 1R- Ignition switch (ACC)
      • Audio unit terminal 1B-Battery positive terminal
  • Audio unit malfunction
G08152588