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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> DTC P1805: Brake Switch >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
DTC No. CONSULT screen terms
(Trouble diagnosis content)		 DTC detecting condition Possible cause
P1805 BRAKE SW/CIRCUIT
(Stop lamp switch circuit)		 A brake switch signal is not sent to ECM for extremely long time while the vehicle is driving.
  • Harness or connectors

    (Stop lamp switch circuit is open or shorted.)

  • Stop lamp switch
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