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Home >> Toyota >> 2010 >> Camry Base, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Key System (Keyless Entry) (Diagnostics - Introduction) (Except Hybrid) >> Smart Key System >> System Diagram >> System Diagram
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System Diagram

Fig 1: Smart Key System Diagram (1 Of 2)
GTY197248Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Smart Key System Diagram (2 Of 2)
GTY178081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Transmitting ECU (Transmitter) Receiving ECU Signals Communication method
Main body ECU Certification ECU Engine switch position signal CAN
Courtesy light switch signal
Door lock output signal
Luggage compartment door output signal
Wireless door lock buzzer request signal
Door lock position switch signal
D/P door key operated switch signal
Luggage compartment door key operated switch signal
Main body ECU Combination meter Wireless door lock buzzer request signal CAN
Certification ECU Main body ECU Illumination light request signal CAN
Light answer back signal
Certification ECU Driver seat ECU Memory call replay request signal CAN
Certification ECU Combination meter Meter buzzer single-shot request signal CAN
Meter buzzer intermittence request signal
Meter buzzer continuation request signal
Door open display signal
Key loss warning signal
Low key battery warning signal
Shift position warning signal
Steering lock abnormal warning
Steering lock unlock warning
Combination meter Certification ECU/Main body ECU Vehicle speed signal CAN
ID code box Certification ECU
  • Matching request random number signal
  • EEP ROM access malfunction
  • Model code matching signal
  • Model code mismatching signal
  • ECM code receiving status
  • Engine start permission request signal
  • Engine start permission response signal
  • S code matching result signal
  • S code registration status signal
  • S code registration mode signal
  • L code matching result signal
  • ECM communication signal
  • Registered key number response signal
  • Diagnosis mode switching signal
  • Registered key number signal
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Certification ECU ID code box
  • 3 bit code request signal
  • ID code matching result signal
  • Registered key number signal
  • Vehicle type handle signal
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Certification ECU
  • ID code box
  • Steering lock ECU
  • L code registration mode signal
  • Diagnosis mode request signal
  • DTC clear request signal
  • L code registration status signal
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Steering lock ECU
  • Certification ECU
  • ID code box
  • Steering lock request signal
  • Steering unlock signal
  • Steering lock confirmation signal
  • Steering unlock confirmation signal
  • Diagnosis response signal
  • Steering unlock drive relay signal
  • Steering lock drive relay signal
  • Steering lock motor operation signal
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Main body ECU Certification ECU
  • Shift position P signal
  • Power ON operation status signal
  • Engine starting status signal
  • ACC relay operating status signal
  • IG relay operating status signal
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Main body ECU Steering lock ECU Steering lock relay power supply status signal LIN
Steering lock ECU
  • Certification ECU
  • Main body ECU
  • Steering lock catching malfunction signal
  • Push button start malfunction signal
  • Engine operation signal
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