Where is ecu on Lexus ls400?

The Engine Control Unit (ECU) on a Lexus LS400 is typically located in the engine compartment, specifically on the driver's side near the fender. It may be housed within a protective cover, so you might need to remove that to access the ECU. Additionally, some models may have the ECU inside the vehicle, under the dashboard on the driver's side. Always refer to the vehicle's service manual for precise location details and instructions.