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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 (On board display) Trouble diagnosis name DTC detecting condition Possible causes
C1A40 (40) SYSTEM SW CIRC IBA OFF switch remains "ON" (short circuit) for 10 minutes or more
  • IBA OFF switch circuit
  • IBA OFF switch
  • ADAS control unit
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