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Home >> Infiniti >> 2012 >> EX35 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Intelligent Cruise Control System (ICC) >> DTC/Circuit Diagnosis >> DTC C1A40: System Switch Circuit >> DTC Logic >> DTC Detection Logic

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 "DTC LOGIC ".