Engine Coolant Temperature Sensor
- Ensure ignition is off. Disconnect electrical connector from Engine Coolant Temperature (ECT) sensor. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION table. To verify wire colors for proper sensor identification, see wiring diagram in WIRING DIAGRAMS
article.NOTE: The ECT may be also identified using appropriate illustration in THEORY/OPERATION article.
- Using ohmmeter, check resistance between ECT sensor electrical terminals. Resistance should be within specification at designated temperature. See Fig 1. Replace ECT sensor if resistance is not within specification.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION
| Model | Location |
|---|---|
| Avalon | Coolant Housing On Top Of Engine, At Timing Belt End Of Engine |