System Diagram

Fig 1: Air Conditioning Communication Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Communication table

COMMUNICATION CHART

Transmitter	Receiver	Signal	Communication Line
Air conditioning amplifier	ECM	A/C compressor control signal Idle up request signal External variable control solenoid current signal Cooling fan motor driving request signal PTC heater driving number request signal	CAN
Air conditioning amplifier	Front light ECU (Front controller)	Rear defogger relay drive signal (Mirror heater operation control) Windshield deicer relay drive signal	CAN
Air conditioning amplifier	Combination meter	Ambient temperature signal	CAN
Air conditioning amplifier	Multi-display	IND display signal Set temperature indication signal Ambient temperature signal Buzzer signal	CAN
Air conditioning amplifier	Integration control and panel*	IND display signal Set temperature indication signal Ambient temperature signal Buzzer signal	CAN
Air conditioning amplifier	Rear power seat module (Rear A/C control panel)	IND display signal Set temperature indication signal Ambient temperature signal Buzzer signal	LIN
ECM	Air conditioning amplifier	Engine revolution speed signal Engine coolant temperature signal A/C control cut signal Variable control prohibition signal PTC heater permission number	CAN
Front light ECU (Front controller)	Air conditioning amplifier	Ambient temperature signal Pressure sensor signal Smog ventilation sensor signal	CAN
Rear junction block ECU	Air conditioning amplifier	Rear solar sensor signal Rear magnetic valve signal Smoke sensor signal	CAN
Combination meter	Air conditioning amplifier	Vehicle speed signal	CAN
Multi-display	Air conditioning amplifier	A/C operation signal Rear A/C operation signal Rear defogger operation signal Windshield deicer operation signal Mirror heater operation signal	CAN
Integration control and panel*	Air conditioning amplifier	A/C operation signal Rear A/C operation signal Rear defogger operation signal Windshield deicer operation signal Mirror heater operation signal	CAN
Rear power seat module (Rear A/C control panel)	Air conditioning amplifier	Rear A/C operation signal	LIN
Rear door ECU LH	Air conditioning amplifier	Rear temperature sensor LH signal	CAN
Rear door ECU RH	Air conditioning amplifier	Rear temperature sensor RH signal	CAN
HINT: *: w/o Multi-display

Fig 2: Air Conditioning Communication Diagram - W/O Multi-Display (1 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Air Conditioning Communication Diagram - W/O Multi-Display (2 Of 4)

Fig 4: Air Conditioning Communication Diagram - W/O Multi-Display (3 Of 4)

Fig 5: Air Conditioning Communication Diagram - W/O Multi-Display (4 Of 4)