AIR CONDITIONING SYSTEM SYSTEM DESCRIPTION

COMMUNICATION SYSTEM FUNCTION

Air conditioning amplifier assembly transmits and receives the signals in each ECU via the CAN communication system and LIN communication system. Also air conditioning amplifier assembly transmits and receives the damper position, damper operation, sensor status. etc., signals in each actuators.

Air Conditioning Amplifier Assembly ←→ Airbag ECU Assembly
Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Airbag ECU assembly	Passenger's seat occupant status	CAN

Air Conditioning Amplifier Assembly ←→ Main Body ECU (Multiplex Network Body ECU)
Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Main body ECU (multiplex network body ECU)	Driver side door courtesy switch	CAN
		Front passenger door side courtesy switch
		Rear door courtesy switch RH
		Rear door courtesy switch LH
		Auto dimmer
		High beam headlight request
		Low beam headlight request
		Destination symbol
		Country Code 1st, 2nd, 3rd
		Steering wheel
		BDB command information 11 to 12
		Solar data (R)
		Solar data (L)
		Presence/absence of PTC
		ACN function information No. 2
		Humidity
		Windshield temperature
		Ambient temperature of humidity sensor
Main body ECU (multiplex network body ECU)	Air conditioning amplifier assembly	Ambient temperature display	CAN
		Water pump request
		PTC heater relay request

Air Conditioning Amplifier Assembly ←→ Headup Display
Receiver	Sender	Signal	Communication Line
Headup display	Air conditioning amplifier assembly	Ambient temperature display	CAN
Headup display	Air conditioning amplifier assembly	Switch signal of 0 or 0.5 below decimal point of ambient temperature display	CAN

Air Conditioning Amplifier Assembly ←→ Radio Receiver Assembly
Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Radio receiver assembly	Tunnel	CAN
		ECO switch information
		Blower custom switch status
		Climate concierge switch state
		Driver auto switch state
		INLET switch state
		Front off switch state
		A/C switch state
		DUAL/SYNC. switch state
		Driver MODE switch state
		Blower front up switch state
		Blower front down switch state
		Ion generator switch status
		Driver outlet switch state
		Driver temperature up switch state
		Driver temperature down switch state
		Passenger temperature up switch state
		Passenger temperature down switch state
		Pollen remove switch state
		Blower front level1 to 7 switch state
		A/C-navi cooperation state
		Driver seat speech recognition operation mode information
		Driver seat speech recognition data addition subtraction information	CAN
		Driver seat speech recognition temperature directions data
		Passenger seat speech recognition operation mode information
		Passenger seat speech recognition data addition subtraction information
		Passenger seat speech recognition temperature directions data
		Driver seat heater operation switch information
		Passenger seat heater operation switch information
		Driver seat blast operation switch information
		Passenger seat blast operation switch information
		Driver seat auto operation switch information
		Passenger seat auto operation switch information
		Driver seat blower operation up switch information
		Passenger seat blower operation up switch information
		Driver seat blower operation down switch information
		Passenger seat blower operation down switch information
		Sensor fail
		Confidence MMC
		Confidence direction
		Switch state of A/C
		AVN1S39 valid information
Radio receiver assembly	Air conditioning amplifier assembly	Driver auto indicator	CAN
		Inlet auto indicator
		REC indicator
		FRS indicator
		A/C indicator
		Wiper deicer indicator
		DUAL/SYNC. indicator
		Front blower level indicator
		Driver outlet-auto indicator
		Driver outlet indicator
		Front BLW manual status
		Ion generator indicator
		LEXUS climate concierge indicator
		Blower custom indicator
		Pollen remove indicator
		A/C on-screen request
		Driver temperature display
		Passenger temperature display
		Outside temperature sensor A/D data
		Refrigerant gas pressure sensor A/D data
		A/C ECO status indicator
		A/C screen select information
		Switch design DUAL/SYNC. select information
		Temperature unit select information
		Front blower step select information
		Speech recognition level information
		Rear control inhibit switch select information
		Rear auto switch select information
		Rear blower step select information
		Destination select information
		Wiper deicer switch select information
		Mirror heater switch select information	CAN
		Airpurifier switch select information
		Plasma cluster switch select information
		Pollen remove select information
		Swing switch select information
		Control information status
		Ion generator switch select information
		S-FLOW switch select information
		Rear blower switch select information
		Rear off switch select information
		Blower custom switch select information
		A/C ECO switch select information
		LEXUS climate concierge switch select information
		Steering heater switch select information
		A/C R/F collaborated with navi information
		Front seat blower and heater switch information
		Rear DEF drive request
		Mirror heater drive request
		In-vehicle temperature
		Ambient temperature display
		Switch signal of 0 or 0.5 below decimal point of ambient temperature display
		Passenger outlet indicator signal for LEXUS climate concierge monitor
		Driver outlet indicator signal for LEXUS climate concierge monitor

Air Conditioning Amplifier Assembly ←→ Parking Brake ECU Assembly
Receiver	Sender	Signal	Communication Line
Parking brake assembly	Air conditioning amplifier assembly	In-vehicle temperature	CAN
Parking brake assembly	Air conditioning amplifier assembly	Ambient temperature display	CAN

Air Conditioning Amplifier Assembly ←→ Rack and Pinion Power Steering Gear Assembly
Receiver	Sender	Signal	Communication Line
Rack and position power steering gear assembly	Air conditioning amplifier assembly	Ambient temperature display	CAN
Air conditioning amplifier assembly	Rack and position power steering gear assembly	Loading control level	CAN

Air Conditioning Amplifier Assembly ←→ Combination Meter Assembly
Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Combination meter assembly	Vehicle speed (meter to other)	CAN
Air conditioning amplifier assembly	Combination meter assembly	Passenger's seat occupant status	CAN
Combination meter assembly	Air conditioning amplifier assembly	Ambient temperature display	CAN
		Switch signal of 0 or 0.5 below decimal point of ambient temperature display
		A/C load limitation warning

Air Conditioning Amplifier Assembly ←→ ECM
Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	ECM	Engine RPM data	CAN
		Voltage of accessory battery
		Compulsory internal air circulation command signal at high water temperature
		Water temperature
ECM	Air conditioning amplifier assembly	Heating performance assistance request to transmission system	CAN
		Water pump request
		Motor cooling fan drive request
		Heater idle up request
		Ambient temperature before correction
		Ambient temperature display
		Prior A/C control request

Air Conditioning Amplifier Assembly ←→ Air Conditioning Control Assembly
Receiver	Sender	Signal		Communication Line
Air conditioning amplifier assembly	Air conditioning control assembly	LCD	Passenger set temperature display instruction	LIN
			Blower level display instruction
			Driver air outlet display instruction
			Driver set temperature display instruction
			General display instruction (FRLCD display instruction)
			General display instruction (RRLCD display instruction)
		Indicator	DUAL/SYNC display instruction
			Rec display instruction
			FRS display instruction
			Automatic recirculation/fresh control display instruction
			A/C display instruction
			DEF display instruction
			AUTO display instruction

Air Conditioning Amplifier Assembly ←→ Damper Servo
Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	No. 1 air conditioning radiator damper servo sub-assembly	Damper arm position	LIN
	No. 2 air conditioning radiator damper servo sub-assembly
	No. 3 air conditioning radiator damper servo sub-assembly
	No. 4 air conditioning radiator damper servo sub-assembly
	No. 5 air conditioning radiator damper servo sub-assembly
	No. 6 air conditioning radiator damper servo sub-assembly
	No. 1 blower damper servo sub-assembly
No. 1 air conditioning radiator damper servo sub-assembly	Air conditioning amplifier assembly
No. 2 air conditioning radiator damper servo sub-assembly
No. 3 air conditioning radiator damper servo sub-assembly
No. 4 air conditioning radiator damper servo sub-assembly
No. 5 air conditioning radiator damper servo sub-assembly
No. 6 air conditioning radiator damper servo sub-assembly
No. 1 blower damper servo sub-assembly

Air Conditioning Amplifier Assembly ←→ Blower Motor, Sensor, Switch etc.
Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Cooler thermistor (room temperature sensor)	Sensor value	Direct line
	Cooler thermistor (No. 2 room temperature sensor)
	Thermistor assembly
	Air conditioner pressure sensor
	No. 1 cooler thermistor
	Air conditioning thermistor assembly
	Cooler thermistor (solar sensor)
	Smog ventilation sensor
	Ion generator	operation status
	Satellite switch set	ECO mode switch
Blower with fan motor sub-assembly	Air conditioning amplifier assembly	Drive
Ion generator	Air conditioning amplifier assembly	Drive