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Home >> Infiniti >> 2004 >> I35 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System >> DTC P1805: Brake Switch >> Description
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DTC P1805: Brake Switch: Description

Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed This signal is used mainly to decrease the engine speed when the vehicle is driving.