Toyota 1 MZ–FE Manual page 526

Check EGR vacuum modulator (See page EG2–210).
Check EGR valve (See page EG2–211).
Check resistance of EGR gas temp. sensor.
Check and replace ECM (See page IN–36).
1MZ–FE ENGINE – CIRCUIT INSPECTION
Repair or replace.
Repair or replace.
(1) Disconnect EGR gas temp. sensor connector.
(2) Start the engine and warm it up.
(3) Disconnect EGR VSV connector.
(4) Race the engine at 4,000 rpm for 3 mins.
Measure the resistance of the EGR gas temp. sen–
sor while racing the engine at 4,000 rpm.
Resistance of EGR gas temp. sensor after 3 mins:
4.3 k
Resistance: 188.6 – 439.0 kW at 202C (682F)
Replace EGR gas temp. sensor.
or Iess
EG2–526