Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Lexus LS 400FACTORY OEM SERVICE PROCEDURE
ECM Location
NOTE:
For location of other computerized engine control components, see appropriate illustration in THEORY & OPERATION article.
ECM LOCATION
| Application | Location |
|---|---|
| ES300, LS400, LX470 & RX300 | Behind Glove Box |
| GS300 & GS400 | Left Front Of Engine Compartment |
| SC300 & SC400 | Under Front Of Carpet On Passenger Side Of Vehicle |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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