Summary of Contents for Honda Accord 1986-310 Service Manual - Page 42

  • Honda Accord 1986-310 Service Manual - Page 42

    —Choke Opener System a 2.02 EXCEPT KX, K0 The fast idle cam is engaged and disengaged by depressing the accelerator pedal, and is also disengaged by the fast idle unloading mechanism. The unloading mechanism consist: of a last idle unloader, and thermovalves A or D and E or E The unloader has two diaphragms to release the throttle valve in two steps. When the coolant temperature reaches the set temperature of thermavalvs B or E, it closes to shut off the vacuum bleed. This allaws the inside diaphragm of the unloader to retract to the Iirst step by manifold vacuum, Yhen, as the coolant temperature rises further and reaches the set temperature of thermovalve A or D, it closes and manifold vacuum is applied to the outside diaphragm or the unloader. This allows the unloader to operate on the second step epoch OPENER FAST IDLE UNLDADEH To INTAKE MANIFOLD —> To INTAKE MANIFOLD I To AIR ro INTAKE To AIR FILTER Elm-En wmm To Am FILTER “ To INTAKE FILTER MANIFOLD THERMO VALVE E THERMO VALVE a memo VALVE n memo VALVE A «5, KP, KT, KF. KG, Kw, KE, KF. KG, KW. KE, KP, Tx TYPES Kv-AT TYPES Kv-MT wees Kv, KS TVPEs Ounb-lefttl‘CISMfFi DWBUIWW1J°C 0pmbelaw4024°c (122:7°FI (nus/H Choke Opener This system is designed to promote easy starting. When starting the engine, manifold vacuum is transmitted to the choke opener; thus the choke Valve is opened a fixed amount. Thermovalve B or E works to open the choke Valve in response to engine coolant temperature. When the engine coolant temperature is below the set temperature of thermovalve B or E, it opens and manifold vacuum is bled from the Valve. In this situation the choke opener diaphragm is retracted to an intermediate position because of the balance between the vacuum and the spring force at the choke opener. When the engine coolant temperature exceeds the set temperature of thermovalve a or E, it closes to shut on the vacuum bleed and this allows the choke opener to retract fully and pull the choke valve open. (mntd) 3-5