Toyota 1 MZ–FE Manual page 516

EG2–516
OBD II scan tool (excluding TOYOTA hand–held tester)
Check resistance of EGR gas temp. sensor.
Check for open in harness or ECM.
Check for open in harness or ECM.
Confirm connection at ECM. If OK, replace ECM.
Check connection of vacuum hose, EGR hose.
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.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Check and replace EGR gas temp. sensor.
Go to step
Open in harness between terminals E2 or
THG. Repair or replace harness.
Repair or replace.
Go to step
Replace VSV for EG R.