Toyota 1 MZ–FE Manual page 524

EG2–524
OBDII 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.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Disconnect EGR gas temp. sensor connector.
Measure resistance between terminals of EGR gas
temp. sensor connector.
Resistance: 600 k or less.
If there is open circuit, ohmmeter indicates 720 k
or more.
Check and replace EGR gas temp. sensor
(See page EG2–303).
Disconnect EGR gas temp. sensor connector.
Measure voltage between terminals of EGR gas
temp. sensor wire harness side connector.
Voltage: 4.5 – 5.5 V
Go to step
(1) Remove glove compartment (See page EG2–
309 ) .
(2) Turn ignition switch ON.
Measure voltage between terminals THG and E2 of
ECM.
HINT: EG R gas temp. sensor connector is dis–
connected.
Voltage: 4.5 – 5.5 V
Open in harness between terminals E2 or
THG. repair or replace harness.
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