Toyota 1 MZ–FE Manual page 212

EG2–212
1MZ–FE ENGINE – EMISSION CONTROL SYSTEMS
4. SEPARATE EGR VALVE AND VACUUM
MODULATOR
(a) Remove the nut and disconnect the EGR vacuum
modulator.
(b) Disconnect the pressure hose from the EGR valve and
remove the EGR vacuum modulator.
5. REMOVE EGR GAS TEMPERATURE SENSOR
6. INSPECT EGR VALVE
Check for sticking and heavy carbon deposits.
If a problem is found, replace the EGR valve.