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 LS 460 AWDFACTORY OEM SERVICE PROCEDURE

System Diagram

Fig 1: Electric Power Control System Diagram

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Communication table

COMMUNICATION CHART

Sender	Receiver	Signal	Line
ECM	Electric power control ECU	Generator signal	CAN
Electric power control ECU	Combination meter (Meter ECU)	Electrical equipment operation limit signal Battery voltage drop signal Generator check signal	CAN

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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.