Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001FPDS
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 08/2020]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): SYSTEM DESCRIPTION; 2019 - 2020 MY RAV4 [11/2018 - 08/2020]

SYSTEM DESCRIPTION

COMMUNICATION SYSTEM FUNCTION

(a) Air conditioning amplifier assembly transmits and receives the signals in each ECU via the CAN communication system and LIN communication system. Also, the air conditioning amplifier assembly transmits and receives the damper position, damper operation, sensor status, etc., signals to and from each actuator.

Air Conditioning Amplifier Assembly ←→ Airbag Sensor Assembly

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Airbag sensor assembly

Front passenger's seat occupant status

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

CAN

Front passenger courtesy switch

Rear courtesy switch LH

Rear courtesy switch RH

Country code 1st, 2nd, 3rd

Steering wheel

Solar data (R)

Solar data (L)

Windshield temperature

Ambient temperature of humidity sensor

Main body ECU (multiplex network body ECU)

Air conditioning amplifier assembly

Ambient temperature display

CAN

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

Receiver

Sender

Signal

Communication Line

Rack and pinion power steering gear assembly (power steering ECU)

Air conditioning amplifier assembly

Ambient temperature display

CAN

Air Conditioning Amplifier Assembly ←→ Combination Meter Assembly

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Combination meter assembly

Vehicle speed (meter to other)

CAN

Front passenger's seat occupant status

Combination meter assembly

Air conditioning amplifier assembly

Ambient temperature display

CAN

Switch signal of 0 or 0.5 below decimal point of ambient temperature display

A/C load limitation warning

Air Conditioning Amplifier Assembly ←→ ECM

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

ECM

Drive mode select

CAN

Engine type information signal 1 - 4

Eco-run flag

Engine r/min data

Water temperature

Alternative field duty value

A/C control cut-off 1, 2 and 4

Variable control inhibition

A/C cut-off instruction flag at deceleration

A/C supercooling command flag at deceleration

Voltage of accessory battery

A/C lubrication control inhibit

Flag for water stop valve close condition

Compulsory internal air circulation command signal at high water temperature

Flow rate to the heater core

ECM

Air conditioning amplifier assembly

Magnet clutch request

CAN

A/C idle up request

Heater idle up request

ECO switch information

Charging control inhibit

Prior A/C control request

Acceleration cut inhibit

Generator control inhibit

Request control by refrigerant

Ambient temperature before correction

Refrigerant information

First advancement evaporator temperature

Variable compressor solenoid current

Refrigerant gas pressure sensor

Ambient temperature display

FSV close request

Minimum heater flow request

Air Conditioning Amplifier Assembly ←→ Air Conditioning Control Assembly (for Automatic Air Conditioning System)

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Air conditioning control assembly

Independent control A/C information

LIN

AUTO switch operation

OFF switch operation

A/C switch operation

ECO switch operation

Blower switch operation

S-FLOW switch operation

Auto/manual identification information

Air outlet switch operation

DUAL switch operation

Driver side set temperature switch operation

Heater/cooler identification information

Front passenger side set temperature switch operation

Recirculation/fresh switch operation

S-FLOW select information

Blower customize select information

Air conditioning control assembly

Air conditioning amplifier assembly

S-FLOW display instruction

LIN

Blower customize display instruction

ECO display instruction

Entire front panel display instruction

AUTO display instruction

Blower level display instruction

Recirculation display instruction

Air outlet display instruction

DUAL display instruction

Driver side set temperature display instruction

Front passenger side set temperature display instruction

A/C display instruction

Air Conditioning Amplifier Assembly ←→ Air Conditioning Control Assembly (for Manual Air Conditioning System)

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Air conditioning control assembly

Independent control A/C information

LIN

OFF switch operation

A/C switch operation

Blower switch operation

Auto/manual identification information (for Automatic Air Conditioning System)

Air outlet switch operation

Set temperature switch operation

Heater/cooler identification information

Recirculation/fresh switch operation

Air conditioning control assembly

Air conditioning amplifier assembly

Entire front panel display instruction

LIN

Blower level display instruction

Recirculation display instruction

Air outlet display instruction

Set temperature display instruction

A/C display instruction

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 arm position

LIN

No. 2 air conditioning radiator damper servo sub-assembly

No. 3 air conditioning radiator damper servo sub-assembly (w/ Driver Seat Centralized Control)

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. 3 air conditioning radiator damper servo sub-assembly (w/ Driver Seat Centralized Control)

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 thermistor (room temperature sensor) (for Automatic Air Conditioning System)

Sensor value

Direct line

Thermistor assembly

Air conditioner pressure sensor

No. 1 cooler thermistor

Integration control and panel assembly (ECO switch)

ECO switch

Blower with fan motor sub-assembly

Air conditioning amplifier assembly

Drive