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.
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HOMESERVICE MANUALSLEXUS2007ES 350REPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSENGINE IMMOBILIZERENGINE IMMOBILIZER SYSTEMSYSTEM DIAGRAM
2007 Lexus ES 350
System Diagram
2007 Lexus ES 350SECTION System Diagram
Communication table:
COMMUNICATION CHART
| Transmitting ECU (Transmitter) | Receiving ECU (Receiver) | Signals | Communication method |
|---|---|---|---|
| Main body ECU | Certification ECU | Key code recognition signal | LIN |
| ID code box | Certification ECU | DTC(B2791) signal | LIN |
| ID code box | Steering lock ECU |
|
LIN |
| ID code box | Certification ECU | Matching request random number signal | LIN |
RENDER: 1.0x
NO RELATED
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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.