Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: System Diagram

SYSTEM DIAGRAM

FRONT AIR CONDITIONING SYSTEM

REAR AIR CONDITIONING SYSTEM (w/ Rear Air Conditioning System)

Communication Table

Sender

Receiver

Signal

Communication Line

Air conditioning amplifier assembly

ECM

Magnetic clutch request signal

CAN

Idle up request signal

Heater idle up request signal

ECO mode switch information signal

Super cooling control state signal

Charging control inhibit signal

Motor cooling fan drive request signal

Prior A/C control request signal

Acceleration cut inhibit signal

PTC heater control request signal

Generator control inhibit signal

Transmission system cooling performance assistance request signal

Request control by refrigerant 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

Radio receiver assembly (A/C control panel)

A/C display request signal

CAN

AUTO indicator signal

Front defroster indicator signal

Rear defogger indicator signal

Inlet auto indicator signal

Recirculation indicator signal

Fresh indicator signal

A/C indicator signal

Wiper deicer indicator signal

DUAL indicator signal

Blower level indicator signal

Outlet auto indicator signal

Outlet indicator signal

Blower manual status signal

S-FLOW switch indicator signal

Blower customize indicator signal

A/C on-screen request signal

S-FLOW state signal

Driver side temperature display signal

Front passenger side temperature display signal

A/C eco state indicator signal

A/C screen select information signal

DUAL switch design select information signal

Temperature unit select information signal

Blower step select information signal

Speech recognition level information signal

Switch select information signal

Destination select information signal

Control information signal

A/C recirculation/fresh collaborated with navi information signal

Rear defogger drive request signal

Mirror heater drive request signal

In-vehicle temperature signal

Ambient temperature display signal

Ambient temperature display whole number/decimal (0/0.5°C) signal

RearR AUTO indicator signal*5

Rear blower manual status signal*5

Rear blower customize indicator signal*5

Rear blower level indicator signal*5

Rear AUTO indicator signal*5

RearR side or Rear side temperature display signal*5

Air conditioning amplifier assembly

Combination meter 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

Main body ECU (multiplex network body ECU)

Ambient temperature display signal

CAN

Air conditioning amplifier assembly

Meter mirror sub-assembly*1

Ambient temperature signal

CAN

Ambient temperature display whole number/decimal (0/0.5°C) signal

Air conditioning amplifier assembly

Outer mirror control ECU assembly LH

Mirror heater drive request signal

CAN

Air conditioning amplifier assembly

Outer mirror control ECU assembly RH

Mirror heater drive request signal

CAN

Air conditioning amplifier assembly

4WD ECU assembly*2

Ambient temperature signal

CAN

Air conditioning amplifier assembly

Brake actuator assembly (skid control ECU)

Ambient temperature before correction signal

CAN

In-vehicle temperature signal

Ambient temperature display signal

Air conditioning amplifier assembly

Forward recognition camera*3

Ambient temperature display signal

CAN

Air conditioning amplifier assembly

DCM (telematics transceiver)*4

Drive recorder signal

CAN

Front defroster indicator signal

A/C indicator signal

S-FLOW switch indicator signal

Driver side temperature display signal

In-vehicle temperature signal

Ambient temperature display signal

A/C control state signal

ECM

Air conditioning amplifier assembly

ECO mode indicator signal

CAN

Drive mode select signal

Engine type information signal

Engine speed data signal

Alternative field duty value signal

Engine coolant temperature signal

A/C control cut-off signal

Variable control inhibition signal

Number of PTC heaters which are permitted signal

Compulsory internal air circulation at high coolant temperature command signal

Radio receiver assembly (A/C control panel)

Air conditioning amplifier assembly

Tunnel signal

CAN

AVN1S04 valid information signal

A/C ECO switch status signal

Blower customize switch state signal

Panel design information signal

Gas auto LED select information signal

AUTO switch state signal

Front defroster switch state signal

Rear defogger switch state signal

Air inlet switch state signal

OFF switch state signal

A/C switch state signal

Wiper deicer switch signal

DUAL switch state signal

Mode switch state signal

Blower up switch state signal

Blower down switch state signal

Air outlet switch state signal

Driver side TEMP up switch state signal

Driver side TEMP down switch state signal

Front passenger side TEMP up switch state signal

Front passenger side TEMP down switch state signal

Air inlet fresh switch state signal

Air inlet recirculation switch state signal

Switch state that shows concentration on one seat signal

Gas reception setting screen signal

Gas reception setting switch state signal

Blower front level 7 switch state signal

Blower front level 6 switch state signal

Blower front level 5 switch state signal

Blower front level 4 switch state signal

Blower front level 3 switch state signal

Blower front level 2 switch state signal

Blower front level 1 switch state signal

A/C-navi cooperation state signal

Rear side seat speech recognition mode information signal

Rear side seat speech recognition date addition subtraction information signal

Rear side seat speech recognition temperature directions data signal

Driver side seat speech recognition mode information signal

Driver side seat speech recognition date addition subtraction information signal

Driver side seat speech recognition temperature directions data signal

Front passenger side seat speech recognition mode information signal

Front passenger side seat speech recognition date addition subtraction information signal

Front passenger side seat speech recognition temperature directions data signal

Sensor fail signal

Confidence MMC signal

Confidence direction signal

Switch state of A/C signal

AVN1S39 valid information signal

RearR AUTO switch state signal*5

Rear blower up switch state signal*5

Rear blower down switch state signal*5

RearR TEMP up switch state signal*5

RearR TEMP down switch state signal*5

RearR air outlet switch state signal*5

RearR mode switch state signal*5

Rear OFF switch state signal*5

Rear control inhibit switch state signal*5

Rear AUTO switch state signal*5

Blower rear level 7 switch state signal*5

Blower rear level 6 switch state signal*5

Blower rear level 5 switch state signal*5

Blower rear level 4 switch state signal*5

Blower rear level 3 switch state signal*5

Blower rear level 2 switch state signal*5

Blower rear level 1 switch state signal*5

Main body ECU (multiplex network body ECU)

Air conditioning amplifier assembly

Auto dimmer signal

CAN

Rear right side courtesy switch signal

Rear left side courtesy switch signal

High beam headlight request signal

Low beam headlight request signal

Destination symbol signal

Destination package signal

Steering wheel signal

Wiper deicer signal

Main body request signal

Solar data (R) signal

Solar data (L) signal

Combination meter assembly

Air conditioning amplifier assembly

Vehicle speed signal (meter to other)

CAN

Front passenger side seat occupant status signal

Power steering ECU assembly

Air conditioning amplifier assembly

Loading control level signal

CAN

Airbag sensor assembly

Air conditioning amplifier assembly

Front passenger side seat occupant status signal

CAN

DCM (telematics transceiver)*4

Air conditioning amplifier assembly

Remote engine start system control signal

CAN

Defogger control signal

Air conditioner control signal

  • *1: w/ Headup Display System
  • *2: for AWD
  • *3: w/ Pre-collision System
  • *4: for Lexus Enform Remote Compatible Type
  • *5: w/ Rear Air Conditioning System
    Parts Location
    PARTS LOCATION ILLUSTRATION *A w/o Rear Air Conditioning System *B w/ PTC Heater *C w/ Smog Ventilation Sensor *D w/ Pre-collision System *1 AIR CONDITIONER PRESSURE SENSOR ...

    System Description
    SYSTEM DESCRIPTION GENERAL The air conditioning system has the following controls. Control Outline Neural Network Control This control is capable of performing complex control by artificial ...

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

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