System Diagram
WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
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Communication table
SIGNAL REFERENCE
| Sender |
Receiver |
Signal |
Line |
| Steering pad switch with modulator (Steering pad ECU) |
Front controller |
Horn signal |
CAN |