Toyota 4-Runner 1985 Repair Manual page 140

EC-40
Hot
Water
EMISSION CONTROL SYSTEMS (CARB.)
Air Suction and Fuel System
Feedback Control System
EC1170
EC0487
ECQ486
Ohmmeter
Ohmmeter
~~::;::;::;::;:;:;:::;:;::~~
EC1094
INSPECTION OF REED VALVE
CHECK REED VALVE BY BLOWING AND SUCKING ON
PIPE
Check that there is air passage when blo\,/Vn hard, and no
air passage when sucked.
A03058
INSPECTION OF VACUUM SWITCH
(a) Using an ohmmeter, check that there is no continui-
ty between the switch terminal and switch body.
(b) Warm up the engine to normal operating temperature.
(c) Using an ohmmeter, check for continuity between the
switch terminal and the body.
INSPECTION OF THERMO SWITCH
(1)
CHECK THERMO SWITCH BY USING OHMMETER
(a) Drain the coolant from the radiator into a suitable con-
tainer.
(b) Remove the thermo switch.
(c) Cool the thermo switch to below 43°C (109°F).
(d) Using an ohmmeter, check that there is continuity.
(e) Heat the switch to above 55°C (131°F) with hot
water.
(f)
Check that there is no continuity.
(g) Apply liquid sealer to the threads of the switch and
reinstall.
(h) Fill the radiator with coolant.