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Home >> Infiniti >> 2012 >> G25 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (EV Control System) >> DTC/Circuit Diagnosis >> DTC P31C1, P31C2: TCU >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTING CONDITION AND POSSIBLE CAUSES

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P31C1 TCU VCM detects the EV system activation request signal (from TCU) is Approx. 5 V for 5 seconds.
  • Harness
  • VCM
  • TCU
P31C2 VCM detects the EV system activation request signal (from TCU) is 0 V for 3 seconds after power switch OFF → ON.