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Home >> Infiniti >> 2012 >> M37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Automatic Transmission) >> DTC/Circuit Diagnosis >> DTC P1815: M-Mode Switch >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. However, it is still accessible from the selected car via links, so may be relevant.
DTC Trouble diagnosis name DTC is detected if... 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.
  • Shift up/down signal of paddle shifter continuously remains ON for 60 seconds.(1)
  • 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)
  • Paddle shifter(1)
(1) With paddle shifter
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