Toyota 1 MZ–FE Manual page 296

EG2–296
1MZ–FE ENGINE – FE ENGINE – SFI SYSTEM
(d) Check that the idle speed after approx. 15 seconds,
does not vary greatly from the idle speed observed in
step
(c). The idle–up valve should now be in ON
position.
If the idle speed is increases by more 100 rpm, using
a 4 mm hexagon wrench, turn the idle–up valve
adjustment screw to correct the idle–up valve.
(e) Remove the SST from the DLC1.
SST 09843–18020
(f) A/C switch OFF.