FixVault

System Diagram

WARNING: This page is about a different car, the 2010 Lexus GS 450h. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Cruise Control System Diagram
GTY142387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
COMMUNICATION TABLE

Sender Receiver Signal Line
Hybrid vehicle control ECU ECM Throttle motor operation signal CAN
ECM Hybrid vehicle control ECU Throttle position sensor signal CAN
Hybrid vehicle control ECU Combination meter CRUISE main indicator light signal CAN