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Home >> Lexus >> 2008 >> LS 460L >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Smart Key System (Keyless Start) (Diagnostics - Introduction)) >> Smart Key System >> System Diagram >> System Diagram
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System Diagram

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Smart Key System Diagram
GTY177595Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Transmitting ECU (Transmitter) Receiving ECU (Receiver) Signals Communication method
Combination meter Power source control ECU
  • Vehicle speed signal
  • Travel distance information
 BEAN
Combination meter Multi-display
  • Door open warning signal
  • Shift position warning signal
  • Smart key system warning light signal
 BEAN / AVC-LAN
Power source control ECU Body ECU
  • Security control signal
 BEAN
Body ECU Power source control ECU
  • Engine start switch illumination signal
  • Stop light switch signal
  • Courtesy light switch signal
  • DTC erase signal
  • DTC response signal
 BEAN
ECM Power source control ECU
  • Engine speed signal
  • Shift P position signal
 BEAN / CAN
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