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Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Theft Deterrent / Keyless Entry >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) >> System Diagram

System Diagram

Fig 1: Smart Access System With Push-Button Start For Entry Function System Diagram (1 Of 2)
G05763626Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Smart Access System With Push-Button Start For Entry Function System Diagram (2 Of 2)
G05763627Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Communication Table: 

COMMUNICATION CHART

Sender Receiver Signal Line
Main Body ECU Certification ECU (Smart key ECU assembly)
  • IG signal
  • ACC signal
  • Engine switch signal
  • Driver side door courtesy light switch signal
  • Passenger side door courtesy light switch signal
  • Rear LH side door courtesy light switch signal
  • Rear RH side door courtesy light switch signal
  • Vehicle type handle signal
  • Back door courtesy light switch signal
  • Back door opener switch signal
  • Wireless door lock buzzer sound signal
  • Door lock position signal
 CAN
Main Body ECU Power back door ECU(1) Back door opener switch signal CAN
Meter ECU
  • Certification ECU (Smart key ECU assembly)
  • Main Body ECU
 Vehicle speed signal CAN
Steering Lock ECU Certification ECU (Smart key ECU assembly)
  • Encryption code signal
  • Encryption code finish signal
  • Encryption calculate fixed number memory requirement signal
  • During entry control signal
 LIN
ID Code Box (Immobiliser code ECU) Certification ECU (Smart key ECU assembly) Matching request random number signal LIN
Certification ECU (Smart key ECU assembly) Meter ECU
  • Inside key existence warning signal
  • Low key battery warning signal
  • Shift position warning signal
  • Meter buzzer request signal
  • Door open indicate signal
  • Steering lock warning signal
 CAN
Certification ECU (Smart key ECU assembly) Main Body ECU
  • Entry door lock signal
  • Entry door unlock signal
  • Entry lock switch signal
  • Door lock/unlock standby control signal
 CAN
Certification ECU (Smart key ECU assembly) Main Body ECU
  • Immobiliser ID entry required signal
  • Key code check signal
 LIN
Certification ECU (Smart key ECU assembly) ID Code Box (Immobiliser code ECU) Replay code signal LIN
(1) w/ Power Back Door System
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