EXHAUST EMISSION CONTROL Throttle Opener Control System (T.O.C.S.) ENTIRE SYSTEM When idling speed is too high and does not drop to idling speed, the throttle opener control system should be checked. 1. Check for continuity between G/R" and B" terminals specified in function check connector with ignition switch OFF. If continuity does not exist, solenoid may be faulty. Replace throttle opener control valve assembly. 2, Turn on ignition switch and check voltage between terminals "G/R" and B". M/T model: Remove speedometer cable from combination meter. Then spin speedometer in combination meter with fingers and confirm that the speed ometer pointer indicates more than 10 km/h (6 MPH) temporarily, Voltage between G/R and B" terminals should be changed as follows: Inspection and Adjustment sEczszA 2. Connect rubber hose between vacuum gauge and intake manifoid. A quick-response type boost gauge such as Bour- don's type is recommended; a mercury-type mano~ meter should not be used. / recs. control valvo7 Above 10 km/h (6 MPH) l2V Below 10 km/h (6 MPH) 0V If not, amplifier or speed detecting switch may be faulty; replace pans with new ones, AIT models Voltage between two terminals should be changed as follows: "N" or "F" position 0V Other positions 12V If not, replace inhibitor switch. THROTTLE OPENER OPERATING PRESSURE 1. Remove harness of solenoid valve. SEC253A 3 Warm up engine until it reaches operating temperature. Then confirm that engine idling speed is specified value. Engine idling speed: M/T: 700250 rpm A/T: 700:50 rpm (in "D" position) 4. Run engine under no-load. Increase engine speed to 3,000 or 3,500 rpm, then quickly close throttle valve.