Toyota 1 MZ–FE Manual page 208

EG2–208
1MZ–FE ENGINE – EMISSION CONTROL SYSTEMS
5. INSPECT VSV OPERATION WITH COLD ENGINE
(a) The engine coolant temperature should be below
552 C (11312F).
(b) Check that the vacuum gauge indicates zero at 2,800
rpm.
(c) Check that the EGR pipe is not hot.
6. INSPECT OPERATION OF VSV AND EGR VACUUM
MODULATOR WITH HOT ENGINE
(a) Warm up the engine to above 802C (176
(b) Check that the vacuum gauge indicates low vacuum
at 2,800 rpm.
(c) Disconnect the vacuum hose from port R of the EGR
vacuum modulator and connect port R directly to the
intake manifold with another hose.
(d) Check that the vacuum gauge indicates high vacuum
at 3,500 rpm.
HINT: As exhaust gas is increasingly recirculated, the
engine will start to misfire.
7. DISCONNECT TERMINALS TE1 AND E1
Remove the SST from the data link connector 1.
SST 09843–18020
°
F).