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Home >> Infiniti >> 2011 >> M37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 302 (Engine Control System - DTCS P0300 To P1212 (For MEXICO)) >> DTC P0603: ECM Power Supply >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2012 Infiniti QX56. 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
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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