Honda CR-V: Emissions Controls

The burning of gasoline in your vehicle’s engine produces several byproducts.

Some of these are carbon monoxide (CO), oxides of nitrogen (NOx), and hydrocarbons (HC).

Gasoline evaporating from the tank also produces hydrocarbons. Controlling the production of NOx, CO, and HC is important to the environment.

Under certain conditions of sunlight and climate, NOx and HC react to form photochemical ‘‘smog.’’ Carbon monoxide does not contribute to smog creation, but it is a poisonous gas.

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 The Clean Air Act

The United States Clean Air Act* sets standards for automobile emissions. It also requires that automobile manufacturers explain to owners how their emissions controls work and what to do to

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Your vehicle has a positive crankcase ventilation system. This keeps gasses that build up in the engine’s crankcase from going into the atmosphere. The positive crankcase ventilation valve

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As gasoline evaporates in the fuel tank, an evaporative emissions control canister filled with charcoal adsorbs the vapor. It is stored in this canister while the engine is off. After the en

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1. Before testing, troubleshoot the B-CAN System Diagnosis Test Mode A, and check the No.8 (10 A), No. 10 (7.5 A), and No. 38 (30 A) fuses in the under-dash fuse/relay box. 2. Disconnect under-dash fuse/relay box connectors E, F, S, and T. NOTE: All connector views are wire side of female termin

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Component Location Index IMMOBILIZER INDICATOR IMMOBILIZER-KEYLESS CONTROL UNIT (Built-in receiver) UNDER-DASH FUSE/RELAY BOX IMOES UNIT (Built into the MICU) PCM IGNITION KEY TRANSPONDER (Combined with the keyless transmitter) System Description The vehicle is equipped with an im

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