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.

SYSTEM DIAGRAM

Fig 1: Identifying Air Conditioning System Diagram (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying Air Conditioning System Diagram (2 Of 2)

Transmitter	Receiver	Line	Signal
A/C Amplifier	ECM	BEAN / CAN	Heater relay control signal
			Magnetic clutch control signal
			Rear DEF relay control signal
			Idle up signal
			Pressure sensor signal
			External variable control solenoid current signal
			A/C compressor ON signal
			Charge prohibit signal
			Heater valve open request signal
			A/C pressure sensor signal
			Thermal load volume signal
A/C Amplifier	Multiplex Network Body ECU	BEAN	Diagnostic tool response
A/C Amplifier	Multiplex Network Body ECU	BEAN	Diagnostic data
A/C Amplifier	A/C Control Assembly	LIN	Indicator ON demand signal
			Warning display demand signal
			Diagnosis signal
ECM	A/C Amplifier	BEAN / CAN	Engine speed (500ms)
			Engine coolant temperature
			A/C control cut signal
			A/C-engine cooperation signal
Front Controller	A/C Amplifier	BEAN	Outside temperature data
Multiplex Network Body ECU	A/C Amplifier	BEAN	Diagnostic tool request signal
			Diagnostic erase signal
			Auto dimmer signal
Combination Meter Assembly	A/C Amplifier	BEAN	Vehicle speed signal
A/C Amplifier	Combination Meter Assembly	BEAN	Buzzer ON request signal
A/C Amplifier	Navigation Receiver Assembly	BEAN / AVC-LAN	EMV-blower level display signal
			EMV-driver seat condition signal
			EMV-front passenger seat condition signal