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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0500 To P1424 >> DTC P0603: ECM Power Supply >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P0603 ECM BACK UP/CIRCUIT
(ECM power supply circuit)		 ECM back up RAM system does not function properly.
  • Harness or connectors

    [ECM power supply (back up) circuit is open or shorted.]

  • ECM
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