Check Valve Inspection; Check Vacuum Circuit Continuity In Vsv By Blowing Air Into Pipe; Check For Short & Open Circuit - Toyota 22R-E Service Manual

EG1–98
ENGINE – EMISSION CONTROL SYSTEMS
VSV INSPECTION
1. CHECK VACUUM CIRCUIT CONTINUITY IN VSV BY
BLOWING AIR INTO PIPE
(a) Connect the VSV terminals to the battery terminals as
illustrated.
(b) Blow air into pipe E and check that air comes out of
pipe G.
(c) Disconnect the battery.
(d) Blow air into pipe E and check that air comes out of air
filter.
If a problem is found, repair the VSV.
2. CHECK FOR SHORT CIRCUIT
Using an ohmmeter, check that there is no continuity
between the terminal and the VSV body. If there is
continuity, replace the VSV. –
3. CHECK FOR OPEN CIRCUIT
Using an ohmmeter, measure the resistance between
the terminals as shown.
Specified resistance: 30–50 Ω at 20SC(68S F)
If the resistance is not within specification, replace the VSV.

CHECK VALVE INSPECTION

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.