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DTC U3003:16 [Advanced Keyless Entry And Push Button Start System]: Notes

DTC U3003:16 (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM) DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION Low voltage in power supply circuit (+B1)
DETECTION CONDITION 
  • Keyless control module power supply circuit (+B1) voltage is 5.0 V-8.5 V for 5 s  .
POSSIBLE CAUSE 
  • Charging system malfunction
    • PCM DTC is stored
  • Battery malfunction
  • Generator malfunction
  • Keyless control module connector or terminals malfunction
  • Open circuit or short to ground in keyless control module power supply circuit
    • Short to ground in wiring harness between battery positive terminal and keyless control module terminal 1E
    • ROOM 15 A fuse malfunction
    • Open circuit in wiring harness between battery positive terminal and keyless control module terminal 1E
  • Keyless control module malfunction
G06731484Courtesy of MAZDA MOTORS CORP.