Toyota 1 MZ–FE Manual page 523

EG2–523
1MZ–FE ENGINE – CIRCUIT INSPECTION
Check EGR vacuum modulator (See page EG2–210).
Repair or replace.
Check EGR valve (See page EG2–211).
Repair or replace.
Check value of EGR gas temp. sensor.
(1) Connect the TOYOTA hand–held tester to the
DLC3.
(2) Turn ignition switch ON and TOYOTA hand–
held tester main switch ON'
(3) Select the active test mode on the TOYOTA
hand–held tester.
(EGR system ON)
(4) Race the engine at 4,000 rpm for 3 mins.
Measure the EGR gas temp. while racing engine at
4,000 rpm.
EGR gas temp. after 3 mins.: 1402C (2842F)
or more
Replace EGR gas temp. sensor.
Check and replace ECM (See page IN–36).