Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Infiniti >> 2012 >> FX35 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 121 (Driver Assistance System (DCA)) >> DTC/Circuit Diagnosis >> DTC C1A40: System Switch Circuit >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2011 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION LOGIC

DTC (On board display) Trouble diagnosis name DTC detection condition Possible causes
C1A40 (40) SYSTEM SW CIRC If the IBA OFF switch is stuck to ON
  • IBA OFF switch circuit
  • IBA OFF switch
  • Brake booster control unit
NOTE: If DTC "C1A40" is displayed along with DTC "U1000", first diagnose the DTC "U1000". Refer to "ICC SENSOR INTEGRATED UNIT : DTC LOGIC ".