ENGINE COOLANT TEMPERATURE (ECT) SENSOR
- Ensure ignition is off. Disconnect electrical connector from ECT sensor. See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION»(ref-91238-S24112892392001030600000) table. Remove ECT sensor. See ENGINE SENSORS & SWITCHES in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
- Place probe end of ECT sensor and thermometer in container of water. Attach ohmmeter between electrical terminals on ECT sensor. Heat water and note that resistance is within specification in relation to temperature. (Scheme 114) Replace ECT sensor if resistance is not within specification.
| Model | Location |
|---|---|
| Camry & Camry Solara | On Coolant Housing At Flywheel End Of Cylinder Head & Contains Green 2-Pin Electrical Connector With Green/Black & Brown Wires |
| Celica | On Coolant Housing At Flywheel End Of Cylinder Head & Contains Dark Gray 2-Pin Electrical Connector With Green & Brown Wires |
| Corolla | On Flywheel End Of Cylinder Head Below Ignition Coil & Contains Dark Gray 2-Pin Electrical Connector With White & Brown Wires |
| RAV4 | On Coolant Housing At Flywheel End Of Cylinder Head & Contains Dark Gray 2-Pin Electrical Connector With White & Brown Wires |
| Tacoma | On Coolant Housing At Rear Of Cylinder Head & Contains Dark Gray 2-Pin Electrical Connector With Green/Red & Brown/Black Wires |
| 4Runner | On Coolant Housing At Rear Of Cylinder Head & Contains Dark Gray 2-Pin Electrical Connector With Green/Red Wire & Blue/Black Or Brown/Black Wires |
ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION
