System Diagram

WARNING: This page is about a different car, the 2012 Lexus CT 200h. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Air Conditioning System Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying Air Conditioning System Diagram

COMMUNICATION TABLE

Sender	Receiver	Signal	Communication Line
Air conditioning amplifier assembly	Navigation computer sub-assembly1 Display and navigation module display2	A/C display request signal	CAN
		A/C indicator signal
		Wiper deicer indicator signal
		DUAL/SYNC indicator signal
		Front blower level indicator signal
		Driver outlet indicator signal
		Micro dust and pollen filter mode indicator signal
		Driver temperature display signal
		Front passenger temperature display signal
		A/C screen select information
		Sw design DUAL/SYNC select information
		Temperature unit select information
		Front blower step select information
		Speech recognition level information
		Destination select information
		Deicer sw select information
		Mirror heater sw select information
		Micro dust and pollen filter mode sw select information
		Control information status
		A/C R/F collaborated with navi information
		Ambient temperature display signal
Air conditioning amplifier assembly	Outer mirror control ECU	Mirror heater drive request signal	CAN
Air conditioning amplifier assembly	Main body ECU (multiplex network body ECU)	Ambient temperature display signal	CAN
Air conditioning amplifier assembly	Main body ECU (multiplex network body ECU)	A/C control state signal	CAN
Air conditioning amplifier assembly	Combination meter assembly	Ambient temperature display signal	CAN
Air conditioning amplifier assembly	Combination meter assembly	Presence signal of exhaust heat withdrawal instrument	CAN
Main body ECU (multiplex network body ECU)	Air conditioning amplifier assembly	Auto dimmer signal	CAN
		Destination symbol
		Destination package 1
		Destination package 2
		Steering wheel
		E/G starter condition
		Defogger on request
		A/C on request
Combination meter assembly	Air conditioning amplifier assembly	Vehicle speed signal (meter to other)	CAN
Electric power steering ECU	Air conditioning amplifier assembly	Loading control level	CAN
Navigation computer sub-assembly1 Display and navigation module display2	Air conditioning amplifier assembly	AVN1S04 valid information	CAN
		Panel design information
		Driver AUTO switch state
		Front OFF switch state
		A/C switch state
		DEICER switch state
		DUAL/SYNC switch state
		Driver outlet switch state
		Micro dust and pollen filter switch state
		Blower front level 7 switch state
		Blower front level 6 switch state
		Blower front level 5 switch state
		Blower front level 4 switch state
		Blower front level 3 switch state
		Blower front level 2 switch state
		Blower front level 1 switch state
		Driver seat speech recognition operation mode information
		Driver seat speech recognition data addition subtraction information
		Driver seat speech recognition temperature directions data
		Front passenger seat speech recognition operation mode information
		Front passenger seat speech recognition data addition subtraction information
		Front passenger seat speech recognition temperature directions data
Center cluster module circuit (Air conditioning control assembly)	Air conditioning amplifier assembly	AUTO operation switch signal	LIN
		OFF operation switch signal
		A/C operation switch signal
		Front defroster operation switch signal
		Rear defogger operation switch signal
		MODE operation switch signal
		REC/FRS operation switch signal
		Driver set temperature switch operation switch signal
		Front passenger set temperature switch operation switch signal
		Blower operation switch signal (up, down)
Air conditioning amplifier assembly	Center cluster module circuit (Air conditioning control assembly)	A/C indication signal	LIN
		DUAL indication signal
		Front panel indication signal
		REC/FRS indication signal
		Front defroster indication signal
		Rear defogger indication signal
		Blower level indication signal
		Set temperature indication signal
		Dimmer signal

*1: w/ Navigation System (for HDD)
*2: w/ Navigation System (for DVD)