Toyota 4-Runner 1985 Repair Manual page 152

EC-52 EMISSION CONTROL SYSTEMS (CARB.) - High Altitude Compensation (HAC) System
Air Filter
~~=~::zzzzz~m--
Cover
EC1 060
EC0107
EC0320
INSPECTION OF HAC VALVE
VISUALLY CHECK AND CLEAN AIR FILTER IN HAC VALVF
A03070
INSPECTION OF CHECK VALVE
CHECK VALVE BY BLOWING AIR INTO EACH PIPE
(a) Check that air flows from the orange pipe to the black
pipe.
(b) Check that air does not flow from the black pipe to
the orange pipe.
INSPECTION OF DISTRIBUTOR VACUUM
ADVANCER
CHECK OPERATION OF VACUUM ADVANCER
(a) Remove the distributor cap and rotor.
(b) Apply vacuum to the diaphragm, and check that the
vacuum advancer moves in accordance with the
vacuum.
(c) Reinstall the rotor and distributor cap.