2008 Lexus GS 460FACTORY OEM SERVICE PROCEDURE

System Diagram

Fig 1: Window Defogger - System Diagram
G05300246Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002

Communication tableΒ 

COMMUNICATION CHART

Sender Receiver Signal Line
Multi-display A/C amplifier assembly (A/C ECU) Rear defogger switch signal BEAN / AVC-LAN
A/C amplifier assembly (A/C ECU) ECM Rear defogger switch signal BEAN / 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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.