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DTC Detection Logic

WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.
DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P3103 DC/DC CONVERTER COOLING SYS (DC/DC converter cooling system performance) When HPCM detects the state of less than 11V in the DC/DC converter output voltage for 2 seconds or more after the DC/DC converter becomes an output limit for 2 seconds or more.
  • Duct
  • Battery cooling fan