He means the throttle plate inside the throttle body...it's how the air gets in the engine.
don't know where that is, however i do have a Haynes Manuel.... I have never cleaned the TB (throttle body)....and i know its not the air filter b/c just cleaned it b/c have a cone filter
'06 GP GT // Debadged // 20" Niche Venice rims w/toyo proxes4 tires, ram air inferno hood, front air dam, SE rear valance, black l.e.d. tail lights, CAI, MSD Ignition wires, Pioneer 6x9, & 10,000K HID headlights!!!