FixVault

System Diagram

Fig 1: Engine Immobilizer System Diagram
G05752991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Communication Table 

COMMUNICATION REFERENCE

Transmitting ECU (Transmitter) Receiving ECU (Receiver) Signal Communication Method
Certification ECU (Smart key ECU assembly) Main body ECU RH (Cowl side junction block RH) Security indicator light flash signal BEAN
Security indicator light illumination signal
Engine immobilizer system set/upset signal
Power source control ECU Main body ECU RH (Cowl side junction block RH) Key code recognition signal BEAN
Steering lock ECU Certification ECU (Smart key ECU assembly) Steering lock signal LIN
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
L code registration status signal
ID code box (Immobilizer code ECU) Certification ECU (Smart key ECU assembly) Matching request random number signal LIN
EEPROM access malfunction signal
Model code matching signal
Model code mismatching signal
ECM code receiving status signal
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
ID code box (Immobilizer code ECU) Steering lock ECU Steering lock release signal LIN
Matching request random number signal
Certification ECU (Smart key ECU assembly) ID code box (Immobilizer code ECU) 3 bit code request signal LIN
ID code matching result signal
Registered key number signal
Vehicle type handle signal
Certification ECU (Smart key ECU assembly)
  • ID code box (Immobilizer code ECU)
  • Steering lock ECU
L code registration mode signal LIN
Diagnosis mode request signal
DTC clear request signal