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.
2001 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Component Location |
|---|---|
| ABS, BA, TRAC & VSC ECU | Behind right side of dash. See Figure. |
| ABS ECU | Behind right side of dash. See Figure. |
| Absorber Control ECU | Behind left side of dash. See Figure. |
| ABS & Traction ECU | Behind right side of dash. See Figure. |
| A/C Blower Motor Linear Controller | Behind left side of dash. |
| A/C Control Assembly | Under center of dash, behind center console. See Figure. |
| Center Air Bag Sensor Assembly | Under center of dash, forward of center console. See Figure. |
| Cruise Control ECU | Behind left side of dash. See Figure. |
| Engine Control Module | Behind right side of dash. See Figure. |
| Headlight Beam Level Control ECU | Behind left side of dash. |
| Headlight Control ECU (Left Highbeam) | Behind left headlight assembly. See Figure. |
| Headlight Control ECU (Left Lowbeam) | Behind left headlight assembly. See Figure. |
| Headlight Control ECU (Right Highbeam) | Behind right headlight assembly. See Figure. |
| Headlight Control ECU (Right Lowbeam) | Behind right headlight assembly. See Figure. |
| Power Window Motor & ECU (LF) | In left front door. |
| Power Window Motor & ECU (RF) | In right front door. |
| Remote Control Mirror ECU | Behind center of dash. |
| Seat Position Control ECU | Under driver's seat. |
| Shift Lock Control ECU | Under center console, beside shift lever. See Figure. |
| Theft Deterrent ECU | Under center of dash, forward of center console. See Figure. |
| Wireless Door Lock ECU | Under center of dash, forward of center console. See Figure. |
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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