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DTC U3003:17 [Advanced Keyless Entry And Push Button Start System]: Notes

WARNING: This page is about a different car, the 2010 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DTC U3003:17 (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM) DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION High voltage in power supply circuit (+B1)
DETECTION CONDITION 
  • Keyless control module power supply circuit (+B1) voltage is 16.5 V or more for 0.5 s  .
POSSIBLE CAUSE 
  • PCM DTC is stored
  • Generator malfunction
  • Keyless control module malfunction