Removal & Installation (GS430, LS430, LX470 & SC430)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect negative battery cable. Drain cooling system. Remove engine cover. Remove intake air connector pipe located between throttle body and air cleaner assembly. Remove throttle body. See THROTTLE BODY under FUEL SYSTEM. Remove ECT sensor.
- To install, reverse removal procedure using NEW gasket. Tighten ECT sensor to specification. See TORQUE SPECIFICATIONS . Fill and bleed cooling system.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION
| Model | Location |
|---|---|
| ES300 | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine; Has Dark Gray 2-Pin Connector With Green/Black & Brown Wires |
| GS300 | Left Front Of Cylinder Head; Has Black 2-Pin Connector With Black/Red & Brown Wires |
| IS300 | Left Front Of Cylinder Head; Has Black 2-Pin Connector With Red & Brown Wires |
| GS430, LS430 & SC430 | Near Throttle Body; Has Black 2-Pin Connector With Red/Blue & Brown Wires |
| LX470 | Passenger's Side Of Coolant Pipe At Front Of Engine, In Front Of Intake Manifold; Has Gray 2-Pin Connector With Green/Black & Brown/White Wires |
| RX300 | On Coolant Housing In Front Of Intake Manifold, At Timing Belt End Of Engine; Has Dark Gray 2-Pin Connector With Green/White & Brown Wires |