FixVault

System Diagram

Fig 1: Engine Immobilizer System Diagram
G04979920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Communication table: 

COMMUNICATION CHART

Transmitting ECU (Transmitter) Receiving ECU (Receiver) Signals Communication method
Main body ECU Certification ECU Key code recognition signal LIN
ID code box Certification ECU DTC(B2791) signal LIN
ID code box Steering lock ECU
  • Steering lock release signal
  • Matching request random number signal
LIN
ID code box Certification ECU Matching request random number signal LIN