System Diagram

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Steering Lock System Diagram

INPUT AND OUTPUT SIGNALS OF EACH ECU

Transmitting ECU (transmitter)	Receiving ECU	Signals	Communication method
Power Source Control ECU	Steering Lock ECU	Power supply status (to steering lock motor)	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Sleep available status	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Lock/Unlock sensor status	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	steering lock status	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Motor control status	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Diagnostic response status	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Lock/Unlock sensor malfunction	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Power supply malfunction (to steering lock motor)	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Motor driver malfunction	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Lock bar (stuck) status	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Push start status	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Lock/Unlock relay drive status	LIN
Steering Lock ECU	Certification ECU Power source control ECU ID code box	Engine start control status	LIN