Inspection Of Intake Air Control System; Check Air Control Valve Operation; Check Vacuum Tank By Blowing Air Into Each Pipe - Toyota 7M-GE Repair Manual

EM-54
ENGINE MECHANICAL - Cylinder Head
EM295
I
EM2954
I
EM295! 5
lnwEcTl0~
0~ INTAKE AIR CONTROL
SYSTEM ('/M-GE only)
. .
1.
CHECK AIR CONTROL VALVE OPERATION
With 400 mmHg (15.75 in.Hg, 53.3 kPa) of vacuum
applied to the actuator, check that the control valve
moves smoothly to the fully closed position.
If not adjust with the adjusting screw.
2. CHECK VACUUM TANK BY BLOWING AIR INTO
EACH PIPE
(a) Check that air flows from pipe B to A.
(b) Checkthat air does not flow from pipe A to B.
(c) Apply 500 mmHg (I 9.69 in.Hg, 66.7 kPa) of vacuum
to pipe B and check that there is no change in
vacuum after one minute.
If there is a change, replace the vacuum tank.
3. CHECK VACUUM CIRCUIT CONTINUITY IN THE VSV
BY BLOWING Alti INTO PIPE
(a) Connect the VSV terminals to the battery terminals
as illustrated.
(b) Blow into pipe E and check that air comes out of the
pipe G.
(c) Disconnect the battery.
(d) Blow into pipe E and check that air comes out of the
air filter.
If a problem is found, replace the VSV.