mxu 500 irs efi Manuale-dofficina : Pagina 46

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Pagina 45

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Pagina 47

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Pagina 48

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          3. INSPECTION/ADJUSTMENT                                                      MXU 500 IRS


 SECONDARY AIR SUPPLY
 SYSTEM
                                                  Check the AICV (air injection control valve)
 This model is equipped with a built-in           hoses between the AICV control solenoid
 secondary air supply system. The pulse           valve and cylinder head for deterioration,
 secondary air supply system is located on        damage or loose connections. Make sure the
 the cylinder head.                               hoses are not cracked.
 The secondary air supply system introduces
 filtered air into exhaust gases in the exhaust   If the hoses show any signs of heat damage,
 port. The secondary air is drawn into the        inspect the AICV check valve in the AICV
 exhaust port whenever there is negative          reed valve cover damage.
 pressure pulse in the exhaust system. This
 charged secondary air promotes burning of
 the unburned exhaust gases and changes a
 considerable amount of hydrocarbons and
 carbon monoxide into relatively harmless
 carbon dioxide and water.




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