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.
2009 Lexus LX 570FACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| A/C Amplifier (Z45) | Center of dash. See Figure. |
| Air Injection Control Driver (Bank 1) | Left side of engine compartment. See Figure. |
| Air Injection Control Driver (Bank 2) | Left side of engine compartment. See Figure. |
| Back Door Remote Control Assembly (F1) | Center of rear door. See Figure. |
| Bus Buffer ECU | Under center console. See Figure. |
| Canister Pump Module (M1) | Under right rear of vehicle. See Figure. |
| Certification ECU | Left side of dash. See Figure. |
| Distance Control ECU | Right center of dash. See Figure. |
| Door Control Receiver | Right "D" pillar. See Figure. |
| ECM (Engine Control Module) | Right rear of engine compartment. See Figure. |
| Fold Seat Control ECU (LH/RH) | Under respective rear seat. See Figure. |
| Four Wheel Drive Control ECU | Right end of dash. See Figure. |
| Front Power Seat Control ECU & Switch Assembly | Under driver's seat. See Figure. |
| Front Seat Climate Control ECU (LH) | Under driver's seat. See Figure. |
| Front Seat Climate Control ECU (RH) | Under front passenger's seat. See Figure. |
| Fuel Pump Control ECU | Left "D" pillar. See Figure. |
| Headlight Swivel ECU | Right end of dash. See Figure. |
| ID Code Box | Left side of dash. See Figure. |
| Main Body ECU | Left end of dash. See Figure. |
| Multi-Display Selector | Under front passenger's seat. See Figure. |
| Multiplex Network Body ECU No. 2 | Right "D" pillar. See Figure. |
| Multiplex Tilt & Telescopic ECU | On steering column. See Figure. |
| Network Gateway ECU | Right side of dash. See Figure. |
| Occupant Detection ECU | Under front passenger's seat. See Figure. |
| Outer Mirror Control ECU | Driver's door. See Figure. |
| Overhead Module | Center front of roof. See Figure. |
| Parking Assist ECU | Right end of dash. See Figure. |
| Seat Belt Control ECU | Left side of dash. See Figure. |
| Shift Lock Control ECU | Under center console. See Figure. |
| Skid Control ECU W/Actuator Assembly | Left rear of engine compartment. See Figure. |
| Sliding Roof Control ECU | Overhead module. See Figure. |
| Steering Control ECU | Left end of dash. See Figure. |
| Stereo Component Tuner Assembly | Under front passenger's seat. See Figure. |
| Suspension Control ECU | Left quarterpanel. See Figure. |
| Telephone ECU | Under center console. See Figure. |
| Tire Pressure Warning Antenna & Receiver | Center of roof. See Figure. |
| Tire Pressure Warning ECU | Right quarterpanel. See Figure. |
| Towing Brake Controller (E21) | Left side of dash. See Figure. |
| Windshield Wiper ECU | Right end of dash. See Figure. |
Factory Service Tools
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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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