Toyota 1 MZ–FE Manual page 529

OBD II scan tool (excluding TOYOTA hand–held tester)
Check resistance of EGR gas temp. sensor.
Check for short in harness and connector between
EGR gas temp. sensor and ECM.
Check the VSV for EG R.
Check operation of the VSV for EG R.
Check for open in harness and connector between
J/B No.2 and ECM.
Check and replace ECM.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Replace EGR gas temp. sensor.
Repair or replace harness or connector.
Check EGR valve.
Replace VSV for EG R.
Repair or replace harness or connector.
EG2–529