Toyota 4-Runner 1985 Repair Manual page 123

EMISSION CONTROL SYSTEMS (CARB ) _ Fuel Evaporative Emission Control
. (EV AP) System
EC-23
Engine Stopped
Outer
Vent_----,.,::.~v
Tube
Engine Running
Hot
Water
n
"l\ 0
Closed
J
EC0303
EC0304
Ohmmeter
00
o
EC0305
Ohmmeter
Ohmmeter
INSPECTION OF OUTER VENT CONTROL VALVE
1. CHECK OUTER VENT CONTROL VALVE OPERATION
(a) Disconnect the outer vent hose from the carburetor.
(b) Blow air into the outer vent pipe and check that the
outer vent control valve is open.
A03041
(c) Start the engine.
(d) With the engine idling, blow air into the outer vent pipe
and check that the outer vent control valve is closed.
2. CHECK SOLENOID
(a) Unplug the wiring connector.
(b) Using an ohmmeter, measure the resistance between
the positive(
+)
terminal and the solenoid body.
Specified resistance: 63 - 73
n
at 20°C (68°F)
INSPECTION OF THERMO SWITCH (1)
CHECK THERMO SWITCH BY USING OHMMETER
(a) Drain the coolant from the radiator into a suitable con-
tainer.
(b)
(c)
(d)
(e)
(f)
(g)
(h)
Remove the thermo switch from the intake manifold.
Cool the thermo switch to below 43°C (109°F).
Using an ohmmeter, check that there is continuity.
Heat the switch to above 55°C (131°F) with hot
water.
Check that there is no continuity.
Apply liquid sealer to the threads of the switch and
reinstall.
Fill the radiator with coolant.