Securities. Lexus Is250, Is220D. Gse20 Ale20
Engine Immobiliser. Lexus Is250, Is220D. Gse20 Ale20
Engine Immobiliser System (For 4Gr-Fse) -- System Diagram |

Transmitting ECU (Transmitter) | Receiving ECU (Receiver) | Signals | Communication method |
Certification ECU | Main body ECU RH |
| BEAN |
Power source control ECU | Certification ECU | Key code recognition signal | BEAN |
ID code box | Certification ECU | DTC (B2791) signal | LIN |
ID code box | Steering lock ECU |
| LIN |
ID code box | Certification ECU | Matching request random number signal | LIN |