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Last Modified: 11-27-2007 1.6 U
Service Category: Vehicle Interior Section: Theft Deterrent/Keyless Entry
Model Year: 2008 Model: LX570 Doc ID: RM000000QYD01PX
Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM: SYSTEM DIAGRAM (2008 LX570)

SYSTEM DIAGRAM



Communication Table

Transmitting ECU (Transmitter)

Receiving ECU (Receiver)

Signal

Communication Method

Certification ECU (smart key ECU assembly)

Main body ECU
  • Engine immobiliser system set/unset signal
  • Engine start signal
  • Transponder valid signal
  • Steering unlock demand signal
  • Steering lock demand signal

LIN

Main body ECU

Certification ECU (smart key ECU assembly)
  • Key code recognition signal
  • Engine start operation signal
  • ACC relay activation signal
  • IG relay activation signal

ID code box (immobiliser code ECU)

Certification ECU (smart key ECU)
  • Matching request random number signal
  • EFI code reception signal
  • Engine start permission demand reception signal
  • S code verification result signal
  • L code verification result signal
  • Steering unlock demand reception signal
  • Steering lock demand reception signal

Steering lock ECU
  • Steering lock release signal
  • Matching request random number signal

Steering lock ECU

Certification ECU (smart key ECU)

L code verification signal