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Home >> Toyota >> 2010 >> 4Runner Trail >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Engine Immobiliser System (W/Smart Key System) (Diagnostics - Introduction) >> Engine Immobiliser System (W/ Smart Key System) >> System Diagram >> System Diagram
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System Diagram

Fig 1: Identifying Engine Immobiliser System Diagram
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COMMUNICATION TABLE

Sender Receiver Signal Line
Certification ECU Power management control ECU
  • Engine immobiliser system set/unset signal
  • Engine start signal
  • Transponder valid signal
  • Steering unlock demand signal
  • Steering lock demand signal
LIN
Power management control ECU Certification ECU
  • Key code recognition signal
  • Engine start operation signal
  • ACC relay activation signal
  • IG relay activation signal
ID code box Certification 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 L code verification signal