System Diagram
WARNING: This page is about a different car, the 2009 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
COMMUNICATION TABLE
| 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/unset 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) |
|
L code registration mode signal | LIN |
| Diagnosis mode request signal | |||
| DTC clear request signal |