Engine Coolant Temperature (ECT) Sensor
- Ensure ignition is off. Disconnect electrical connector from ECT sensor. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION table. To verify wire colors for proper sensor identification, see wiring diagram in the WIRING DIAGRAMS
article.NOTE: The ECT may be also identified using appropriate illustration in the 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 |
|---|---|
| Tercel | Coolant Housing At Flywheel End Of Cylinder Head |