Operation Section 1 ± 26 7. EXHAUST GAS CONTROL SYSTEM 7.1 Exhaust Gas Recirculation (EGR) System (2004 Model Only) (1) Control system )RKMRI)'9 )+68EVKIX3TIRMRK *MREP)+68EVKIX 3TIRMRK'EPGYPEXMSR 4VSGIWWMRK(YX]6EXMS 'EPGYPEXMSR )+6(IZMEXMSR 'SQTIRWEXMSR'SRXVSP )+6:EPZI0MJX7IRWSV (IXIGXW%GXYEP4SWMXMSR )+6:EPZI%GXYEXMSR *IIHFEGO )+6:EPZI%WWIQFP] 5) (2) Related sensors ‡ Air volume sensor: Detects the volume of air flowing into the engine. ‡ Coolant temperature sensor: Detects the engine coolant temperature. ‡ Atmospheric pressure sensor:
Detects the atmospheric pressure around the engine (built into the ECU.) (3) EGR valve ‡ An EGR valve is used as the system actuator for the Electric-Exhaust Gas Recirculation (E-EGR) system. The EGR valve consists of an upper section and a lower section. The upper section receives output signals from the engine ECU, and contains a solenoid that generates electromagnetic force. The lower section is constructed of a nozzle that moves up and down in response to the electromagnetic force, and a valve with an opening that changes in response to the nozzle position. 5) .(" .)"