HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Mechanical Control Type)  SYSTEM DESCRIPTION  

The air conditioning amplifier assembly communicates with each ECU via CAN communication. Additionally, the air conditioning amplifier assembly sends operation signals to the damper servo motor and sensor information from the damper servo motors and No. 1 cooler thermistor through the air conditioning harness assembly.

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)	Auto dimmer signal	CAN
		Front passenger door courtesy switch signal
		Rear right door courtesy switch signal
		Rear left door courtesy switch signal
		High beam headlight request signal
		Low beam headlight request signal
		BDB1S08 sub ID signal
		BDB1S08 INFO signal
		Destination symbol signal
		Country code 1st signal
		Country code 2nd signal
		Country code 3rd signal
		Steering wheel signal
		Solar data (R) signal
		Solar data (L) signal
		Humidity signal
		Windshield temperature signal
		Ambient temperature of humidity sensor signal
Main body ECU (multiplex network body ECU)	Air conditioning amplifier assembly	Ambient temperature display signal	CAN

Air Conditioning Amplifier Assembly ←→ Power Steering ECU with Motor Assembly

Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Power steering ECU with motor assembly	Loading control level signal	CAN

Air Conditioning Amplifier Assembly ←→ Combination Meter Assembly

Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Combination meter assembly	Vehicle speed signal (meter to other)	CAN
		Front passenger presence signal
Combination meter assembly	Air conditioning amplifier assembly	Ambient temperature display signal	CAN
		Ambient temperature display whole number/decimal (0/0.5°C) signal

Air Conditioning Amplifier Assembly ←→ ECM

Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	ECM	Engine type information 1 signal	CAN
		Engine type information 2 signal
		Engine type information 3 signal
		Engine type information 4 signal
		HV flag signal
		Eco-run flag signal
		Engine r/min data signal
		Engine coolant temperature signal
		Alternative field duty value signal
		A/C control cut-off 1 signal
		A/C control cut-off 2 signal
		A/C control cut-off 3 signal
		A/C control cut-off 4 signal
		A/C control cut-off 5 signal
		Variable control inhibition signal
		Deceleration A/C control cut flag signal
		Deceleration A/C control excessive cooling flag signal
		Number of PTC heater which is permitted signal
		Compressor oil return prohibition request signal
		Compulsory internal air circulation at high coolant temperature command signal
ECM	Air conditioning amplifier assembly	Magnet clutch request signal	CAN
		Idle up request signal
		Heater idle up request signal
		ECO switch information signal
		Excessive cooling control state notification signal
		Charging control inhibit signal
		Prior A/C control request signal
		Acceleration cut inhibit signal
		Lock-up inhibit signal
		PTC Heater control request signal
		Generator control inhibit signal
		Transmission system heating performance assistance request signal
		Ambient temperature before correction signal
		Refrigerant information signal
		Evaporator temperature sensor signal
		Variable compressor solenoid current signal
		Air conditioner pressure sensor signal
		Rear defogger drive request signal
		Ambient temperature display signal

Air Conditioning Amplifier Assembly ←→ Engine Stop and Start ECU

Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Engine stop and start ECU	Eco run control mode signal	CAN
		Eco run cancel light lighting request signal
		Stop and start A/C mode signal

Air Conditioning Amplifier Assembly ←→ Damper Servo

Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	No. 1 blower damper servo sub-assembly	Damper position signal	Direct line

Air Conditioning Amplifier Assembly ←→ Blower Motor, Sensor, Switch, etc.

Receiver	Sender	Signal	Communication Line
Air conditioning amplifier assembly	Thermistor assembly	Sensor value signal	Direct line
	Air conditioner pressure sensor
	No. 1 cooler thermistor
Blower motor with fan sub-assembly	Air conditioning amplifier assembly	Drive signal	Direct line
Compressor assembly with pulley
HTR FR relay
PTC HTR No. 1 relay
PTC HTR No. 2 relay
PTC HTR No. 3 relay