AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) SYSTEM DESCRIPTION

COMMUNICATION SYSTEM FUNCTION

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

   Air Conditioning Amplifier Assembly ←→ Airbag Sensor Assembly

   Receiver	Sender	Signal	Communication Line
   Air conditioning amplifier assembly	Airbag sensor assembly	Front passenger seat occupant status signal	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)	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
   		Destination symbol signal
   		Country code signal
   		Steering wheel signal
   Main body ECU (multiplex network body ECU)	Air conditioning amplifier assembly	Rear defogger drive request signal	CAN
   		Ambient temperature display signal

   Air Conditioning Amplifier Assembly ←→ Power Steering ECU (Rack and Pinion Power Steering Gear Assembly)

   Receiver	Sender	Signal	Communication Line
   Air conditioning amplifier assembly	Rack and pinion power steering gear assembly (power steering ECU)	Loading control level signal	CAN
   Rack and pinion power steering gear assembly (power steering ECU)	Air conditioning amplifier assembly	Ambient temperature display 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
   		A/C load limitation warning signal

   Air Conditioning Amplifier Assembly ←→ ECM (for 2AR-FE)

   Receiver	Sender	Signal	Communication Line
   Air conditioning amplifier assembly	ECM	Drive mode select signal	CAN
   		Engine type information signal
   		Engine r/min data signal
   		Alternative field duty value signal
   		Engine coolant temperature signal
   		A/C control cut-off signal
   		Variable control inhibition signal
   		Compulsory internal air circulation at high coolant temperature command signal
   ECM	Air conditioning amplifier assembly	Idle up request signal	CAN
   		Heater idle up request signal
   		Charging control inhibit signal
   		Prior A/C control request signal
   		Acceleration cut inhibit signal
   		Generator control inhibit signal
   		Request control by refrigerant 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 ←→ ECM (for A25A-FKS)

   Receiver	Sender	Signal	Communication Line
   Air conditioning amplifier assembly	ECM	Drive mode select signal	CAN
   		Engine type information signal
   		Engine r/min data signal
   		Alternative field duty value signal
   		Engine coolant temperature signal
   		A/C control cut-off signal
   		Variable control inhibition signal
   		Compulsory internal air circulation at high coolant temperature command signal
   		Flag for water stop valve close condition signal
   		Heater core flow rate signal
   ECM	Air conditioning amplifier assembly	Idle up request signal	CAN
   		Heater idle up request signal
   		Charging control inhibit signal
   		Prior A/C control request signal
   		Acceleration cut inhibit signal
   		Generator control inhibit signal
   		Request control by refrigerant signal
   		Ambient temperature before correction signal
   		Evaporator temperature sensor signal
   		Variable compressor solenoid current signal
   		Air conditioner pressure sensor signal
   		Rear defogger drive request signal
   		Ambient temperature display signal
   		Heater priority request signal
   		FSV close request signal
   		Minimum heater flow request signal

   Air Conditioning Amplifier Assembly ←→ Air Conditioning Control Assembly

   Receiver	Sender	Signal	Communication Line
   Air conditioning amplifier assembly	Air conditioning control assembly	Independent control A/C information signal	LIN
   		OFF switch operation signal
   		A/C switch operation signal
   		Blower switch operation signal
   		Air outlet switch operation signal
   		Front defroster switch operation signal
   		Rear defogger switch operation signal
   		Recirculation/fresh switch operation signal
   Air conditioning control assembly	Air conditioning amplifier assembly	Entire front panel display instruction signal	LIN
   		Blower level display instruction signal
   		Recirculation/fresh display instruction signal
   		Air outlet display instruction signal
   		Rear defogger display instruction signal
   		Set temperature display instruction signal
   		Dimmer signal
   		A/C display instruction signal

   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 position signal	LIN
   	No. 2 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. 1 blower damper servo sub-assembly

   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
   Compressor assembly with pulley (compressor solenoid)