All Models
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure ignition is off. Note location of Engine Coolant Temperature (ECT) sensor. See ENGINE COOLANT TEMPERATURE SENSOR LOCATION table. Remove ECT sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in REMOVAL & INSTALLATION - V6 & V8 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. See Fig 1. Replace ECT sensor if resistance is not within specification.
ENGINE COOLANT TEMPERATURE SENSOR LOCATION
| Model | Location | |
|---|---|---|
| Avalon | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine & Contains Dark Gray Electrical Connector With Green/Yellow & White Wires | |
| Camry | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine & Contains Dark Gray Electrical Connector With Green/Black & Brown Wires | |
| Camry Solara | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine & Contains Dark Gray Electrical Connector With Green/Black & Brown Wires | |
| Highlander | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine & Contains Dark Gray Electrical Connector With White/Blue & White Wires | |
| Land Cruiser | Passenger's Side Of Coolant Pipe At Front Of Engine, In Front Of Intake Manifold & Contains Black Electrical Connector With Green/Black & Brown/White Wires | |
| Sequoia | Passenger's Side Of Coolant Pipe At Front Of Engine, In Front Of Intake Manifold & Contains Black Electrical Connector With Green/Yellow & Green/White Wires | |
| Sienna | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine & Contains Dark Gray Electrical Connector With Green/Black & Brown Wires | |
| Tacoma | Behind Upper Timing Belt Cover, On Top Of Intake Manifold & Contains Dark Gray Electrical Connector With Green/Red & Brown/Black Wires | |
| Tundra | ||
| 3.4L | Behind Upper Timing Belt Cover, On Top Of Intake Manifold & Contains Dark Gray Electrical Connector With Green/Yellow & Brown/Black Wires | |
| 4.7L | Passenger's Side Of Coolant Pipe At Front Of Engine, In Front Of Intake Manifold & Contains Black Electrical Connector With Green & Black/White Wires | |
| 4Runner | ||
| 4.0L | On Water By-Pass Pipe Located At Rear Of Engine & Contains Dark Gray Electrical Connector With Black/Blue & Brown Wires | |
| 4.7L | Passenger's Side Of Coolant Pipe At Front Of Engine, In Front Of Intake Manifold & Contains Black Electrical Connector With Red/Blue & Brown Wires | |