System Diagram
WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
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 |
|
LIN |
| ID code box | Certification ECU | Matching request random number signal | LIN |