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Home >> Infiniti >> 2012 >> M35h >> Repair and Diagnosis >> Transmission >> Automatic Transmission >> DTC/Circuit Diagnosis >> DTC P1815: M-Mode Switch >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC Trouble diagnosis name Malfunction detected condition Possible cause
P1815 Manual Mode Switch Circuit TCM monitors manual mode, non manual mode, up or down switch signal, and detects as irregular when impossible input pattern occurs 2 second or more.
  • Harness or connectors (These switches circuit is open or shorted.)
  • Mode select switch (Into A/T shift selector)
  • Position select switch (Into A/T shift selector)
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