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Home >> Toyota >> 2012 >> Prius Four >> Repair and Diagnosis (Single Page) >> External Pages >> Different variant/trim >> Section 17 (Engine Immobilizer System (Plug-In) (Diagnostics - Introduction)) >> Engine Immobiliser System >> System Diagram >> System Diagram
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System Diagram

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Fig 1: Identifying Engine Immobiliser System Diagram
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Transmitting ECU (Transmitter) Receiving ECU (Receiver) Signal Communication Method
Certification ECU (Smart key ECU assembly) ID code box (Immobiliser code ECU)* 3 bit code transmit request signal LIN
S code registration mode signal
S code certification condition signal
Hybrid control system start condition signal
Transmission control ECU assembly L code registration mode signal LIN
ID code box (Immobiliser code ECU)* Certification ECU (Smart key ECU assembly) Hybrid control system start permission receive condition signal LIN
3 bit code transmit request receive condition signal
S code certification result signal
L code certification result signal
S code registration mode signal
S code registration condition signal
Transmission control ECU assembly L code registration condition signal LIN
  • Certification ECU (Smart key ECU assembly)
  • Transmission control ECU assembly
L code registration mode signal LIN
Transmission control ECU assembly Certification ECU (Smart key ECU assembly) L code registration condition signal LIN
Hybrid control system start condition signal
ID code box (Immobiliser code ECU)* L code certification condition signal LIN