Toyota 1 MZ–FE Manual page 460

EG2–460
2
Check for open in harness or ECM.
3
Check for open in harness or ECM.
Confirm good connection at ECM.
If OK, replace ECM .
1MZ–FE ENGINE – CIRCUIT INSPECTION
(1) Disconnect the engine coolant temp. sensor
connector.
(2) Connect sensor wire harness terminals to–
gether.
(3) Turn ignition switch ON.
Read temperature value on the OBDII scan tool or
TOYOTA hand–held tester.
Temperature value: 1202C (2482F) or more
Confirm good connection at sensor. If OK,
replace engine coolant temp. sensor.
(1) Remove glove compartment.
(See page EG2–309)
(2) Connect between terminals THW and E2 of
ECM E8 connector.
HINT: Engine coolant temp. sensor connector is dis–
connected. Before checking, do a visual and
contact pressure check for the ECM connector.
(See page EG2–418)
(3) Turn ignition switch ON.
Read temperature value on the OBDII scan tool or
TOYOTA hand–held tester.
Temperature value: 1202C (2482F) or more
Open in harness between terminals E2 or
THW, repair or replace harness.