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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Air Conditioning System (Diagnostics - Introduction) (Hybrid)) >> AIR CONDITIONING SYSTEM (for HV Model) >> System Description [07/2022 - ] >> System Description [07/2022 - ]

System Description [07/2022 - ]

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  1. 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 ECU ASSEMBLY

      Receiver Sender Signal Communication Line
      Air conditioning amplifier assembly Airbag ECU assembly Passenger's seat occupant status CAN
      AIR CONDITIONING AMPLIFIER ASSEMBLY ←→ DCM(TELEMATICS TRANSCEIVER) (W/ TELEMATICS TRANSCEIVER)

      Receiver Sender Signal Communication Line
      DCM (Telematics Transceiver) Air conditioning amplifier assembly Drive Recorder ACN01 CAN
      Drive Recorder ACN02
      Drive Recorder ACN03
      Drive Recorder ACN04
      Drive Recorder ACN05
      Drive Recorder ACN06
      Drive Recorder ACN07
      Drive Recorder ACN08
      DEF INDICATOR signal
      A/C INDICATOR signal
      Indicator signal that shows concentration on one seat
      Dr TEMPERATURE Display signal
      In-Vehicle temperature signal
      Ambient temperature display signal
      A/C control state signal
      Air conditioning amplifier assembly DCM(Telematics Transceiver) Remote E/G Start System Control Signal CAN
      YGW1S02 Sub ID
      YGW1S02 INFO
      Defogger Control Signal
      Air Conditioner Control Signal
      AIR CONDITIONING AMPLIFIER ASSEMBLY ←→ ECM

      Receiver Sender Signal Communication Line
      ECM Air conditioning amplifier assembly Heating performance assistance request signal to transmission system CAN
      Motor Cooling Fan drive request signal
      Heater Idleup request signal
      Ambient temperature before correction, signal
      Ambient temperature display signal
      Prior A/C control request signal
      Heater priority request
      FSV close request
      Minimum heater flow request
      Ambient temperature before correction, signal
      Refrigerant gas pressure sensor signal
      Air conditioning amplifier assembly ECM Engine RPM data CAN
      Water temperature signal
      Voltage of accessory battery
      Compulsory internal air circulation command signal at high water temperature
      Flow rate to the heater core
      AIR CONDITIONING AMPLIFIER ASSEMBLY ←→ RADIO RECEIVER ASSEMBLY

      Receiver Sender Signal Communication Line
      Radio receiver assembly Air conditioning amplifier assembly A/C Display request signal CAN
      Dr AUTO INDICATOR signal
      DEF INDICATOR signal
      Rr DEF INDICATOR signal
      REC INDICATOR signal
      FRS INDICATOR signal
      A/C INDICATOR signal
      MIRROR HEATER INDICATOR signal
      WIPER DEICER INDICATOR signal
      Dual/SYNC INDICATOR signal
      Front Blower Level INDICATOR signal
      Dr OLET-AUTO INDICATOR signal
      Dr OLET INDICATOR signal
      Fr BLW MANUAL status
      Indicator signal that shows concentration on one seat
      Nano-E indicator signal
      Climate Concierge indicator signal
      Blower Custom INDICATOR signal
      POLLEN REMOVE INDICATOR signal
      A/C ON-SCREEN request signal
      Request Sflow Status
      Dr TEMPERATURE Display signal
      Pa TEMPERATURE Display signal
      A/C ECO Status INDICATOR signal
      A/C SCREEN Select information
      SW DESIGN DUAL/SYNC. Select information
      TEMPERATURE UNIT Select information
      Front BLOWER STEP Select information
      SPEECH RECOGNITION Level information
      DESTINATION Select information
      WIPER DEICER SW Select information
      MIRROR HEATER SW Select information
      POLLEN REMOVE Select information
      CONTROL INFORMATION Status
      Nano-E SW select information
      SFLOW SW Select information
      Blower Custom SW select information
      A/C ECO SW select information
      Climate Concierge SW select information
      Steering Heater SW select information
      A/C R/F collaborated with NAVI information
      Front Seat blower and Heater SW information
      Rr DEF drive request signal
      Mirror Heater drive request signal
      In-Vehicle temperature signal
      Ambient temperature display signal
      Switch signal of 0 or 0.5 below decimal point of ambient temperature display
      Pa Blower Temperature display signal
      Dr Blower Temperature display signal
      Radio receiver assembly Air conditioning amplifier assembly Pa OLET INDICATOR signal for climate concierge monitor CAN
      Dr OLET INDICATOR signal for climate concierge monitor
      Steering Heater Level display
      Pa CLIMATE CONTROL SEAT AUTO INDICATOR signal
      Dr CLIMATE CONTROL SEAT AUTO INDICATOR signal
      Steering Heater AUTO INDICATOR signal
      Pa Fr Seat Blower Level display
      Pa Fr Seat Heater Level display
      Dr Fr Seat Blower Level display
      Dr Fr Seat Heater Level display
      Air conditioning amplifier assembly Radio receiver assembly A/C ECO SW Status CAN
      Blower Custom SW Status
      Climate concierge switch state
      Dr AUTO switch state
      DEF switch state
      RrDEF switch state
      INLET switch state
      Front OFF switch state
      A/C switch state
      WIPER DEICER switch state
      DUAL/SYNC switch state
      Dr MODE switch state
      Blower FRONT UP switch state
      Blower FRONT DOWN switch state
      Nano-E switch state
      Dr OLET switch state
      Dr temperature UP switch state
      Dr temperature Down switch state
      Pa temperature UP switch state
      Pa temperature Down switch state
      POLLEN REMOVE switch state
      Switch state that shows concentration on one seat
      Blower FRONT Level7 switch state
      Blower FRONT Level6 switch state
      Blower FRONT Level5 switch state
      Blower FRONT Level4 switch state
      Blower FRONT Level3 switch state
      Blower FRONT Level2 switch state
      Blower FRONT Level1 switch
      Dr SEAT speech recognition operation mode information
      Dr SEAT speech recognition data addition subtraction information
      Dr SEAT speech recognition temperature directions data
      Pa SEAT speech recognition operation mode information
      Pa SEAT speech recognition data addition subtraction information
      Pa SEAT speech recognition temperature directions data
      Air conditioning amplifier assembly Radio receiver assembly Dr Seat Heater Operation SW information CAN
      Pa Seat Heater Operation SW information
      Dr Seat Blast Operation SW information
      Pa Seat Blast Operation SW information
      Dr Seat AUTO Operation SW information
      Pa Seat AUTO Operation SW information
      Steering Heater Operation SW Information
      Steering Heater AUTO Operation SW Information
      Steering Heater Temperature Up Operation SW Information
      Steering Heater Temperature Down Operation SW Information
      Dr Seat Heater Operation Up SW information
      Pa Seat Heater Operation Up SW information
      Dr Seat Heater Operation Down SW information
      Pa Seat Heater Operation Down SW information
      Dr Seat Blower Operation Up SW information
      Pa Seat Blower Operation Up SW information
      Dr Seat Blower Operation Down SW information
      Pa Seat Blower Operation Down SW information
      Switch State of A/C
      AVN1S39 valid information
      AIR CONDITIONING AMPLIFIER ASSEMBLY ←→ COMBINATION METER ASSEMBLY

      Receiver Sender Signal Communication Line
      Combination meter assembly Air conditioning amplifier assembly Ambient temperature display signal CAN
      Switch signal of 0 or 0.5 below decimal point of ambient temperature display
      A/C Load Limitation Warning
      Air conditioning amplifier assembly Combination meter assembly Vehicle speed signal (meter to other)
      Passenger presence signal
      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
      Rear right side courtesy SW signal
      Rear left side courtesy SW signal
      Destination Symbol
      Country Code 1st
      Country Code 2nd
      Country Code 3rd
      Steering Wheel
      Main Body Request 11
      Main Body Request 12
      grade
      Solar data (R)
      Solar data (L)
      ACN Function Information No. 2
      Humidity signal
      Windshield temperature signal
      Ambient temperature of humidity sensor
      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 CAN
      AIR CONDITIONING AMPLIFIER ASSEMBLY ←→ HYBRID VEHICLE CONTROL ECU

      Receiver Sender Signal Communication Line
      Air Conditioning amplifier assembly Hybrid vehicle control ECU Drive Mode Select Signal CAN
      Battery maximum temperature
      State of STB (stand by)
      Compulsion recycle request
      Communication AC inverter and HV ECU
      No electrical heater request
      A/C permission electric power
      READY signal
      A/C inverter main voltage signal
      A/C inverter output signal
      Motor over load information
      Communication AC inverter and HV ECU
      Motor start information
      A/C inverter internal power source malfunction
      STB wire short
      State of STB
      A/C inverter temperature information
      Self check
      Thermistor cold temperature malfunction
      BTC DOWN Signal
      AC load state signal
      Regenerative torque, Fr for ACN
      Actual front regenerative torque (high precision) for ACN
      A/C motor revolution
      A/C input power
      A/C inverter temperature
      A/C-Inverter CPU error flag
      A/C-Inverter CPU initialization flag
      Engine type information 1
      Engine type information 2
      Engine type information 3
      Engine type information 4
      HV flag
      Eco-Run flag
      Hybrid vehicle control ECU Air Conditioning amplifier assembly Refrigerant gas pressure sensor signal CAN
      Comp command acceleration
      In-Vehicle temperature signal
      Heating performance assistance request signal to transmission system
      Motor Cooling Fan drive request signal
      Front Blower Level INDICATOR signal
      Heater Idleup request signal
      ECO SW information
      Engine ON request signal
      Charging control inhibit signal
      Comp command acceleration
      In-Vehicle temperature signal
      Front Blower Level INDICATOR signal
      Heater Idleup request signal
      Electromotion Compressor Target revolutions signal
      Ambient temperature before correction, signal
      Ambient temperature display signal
      Electromotion Compressor start signal
      Humidity control for Electromotion Compressor, start signal
      Prior A/C control request signal
      Standby for inverter, request signal
      Inlet state signal (for cooling battery)
      A/C control state signal
      AIR CONDITIONING AMPLIFIER ASSEMBLY ←→ AIR CONDITIONING CONTROL ASSEMBLY

      Receiver Sender Signal Communication Line
      Air conditioning amplifier assembly Air conditioning control assembly Independent A/C control information signal LIN
      AUTO switch operation signal
      OFF switch operation signal
      Blower switch operation signal
      Air outlet mode switch operation signal
      Front defroster switch operation signal
      Rear defogger switch operation signal
      Driver side temperature setting signal
      Front passenger side temperature setting signal
      Air inlet mode switch 2 operation signal
      Part number information 1 signal
      Part number information 2 signal
      Part number information 3 signal
      Part number information 4 signal
      Part number information 5 signal
      Air conditioning control assembly Air conditioning amplifier assembly Dimmer signal LIN
      Auto display instruction signal
      REC display instruction signal
      FRS display instruction signal
      Driver side air outlet display instruction signal
      RDEF display instruction signal
      Driver side temperature setting display instruction signal
      Front passenger side temperature setting 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 Cooler (room temp. sensor) thermistor Sensor value signal Direct line
      Thermistor assembly
      Air conditioner pressure sensor
      No. 1 cooler thermistor
      ECO switch (satellite switch set) ECO switch signal
      Blower motor with fan sub-assembly Air conditioning amplifier assembly Drive signal Direct line
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