Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001FPEP
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 08/2020]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): Cooling is Poor; 2019 - 2020 MY RAV4 [11/2018 - 08/2020]

Cooling is Poor

DESCRIPTION

If the cooling air is poor (cooling air is discharged), the following causes are possible.

Malfunction Status

Factor
  • Cooling is poor.
  • Takes time to cool down.
  • ECO drive mode function (air flow volume is restricted due to ECO drive mode being selected)
  • Compressor with pulley assembly malfunction
  • Excessive refrigerant
  • Lack of refrigerant gas
  • Dirty cooler condenser
  • Cooling fan system malfunction
  • Air mix damper and link operation (jamming)
  • Automatic light control sensor (for Automatic Air Conditioning System)
  • Warm air flow

WIRING DIAGRAM

for Automatic Air Conditioning System:

PROCEDURE

1.

CHECK ECO DRIVE MODE OPERATION

(a) Confirm setup of the ECO drive mode and turn it off if it is on.

HINT:

  • When ECO drive mode is on, the air conditioning amplifier assembly ensures a minimum level of air conditioning control based on certain conditions, thereby contributing to improved fuel efficiency. Accordingly, explain to customers that the air volume will be weaker in these situations.

    Control

    Control Summary

    Airflow Control

    Automatically switches the air inlet port to the internal air circulation mode when the outside air temperature is equal to or higher than a predetermined temperature and reduces the power consumption.

    Air Inlet Control

    Sets the blower level in AUTO mode lower than normal, and suppresses the power consumption.
  • If integration control and panel assembly (ECO switch) is malfunctioning, perform diagnosis on the ECO switch circuit.

    Click here 2019 - 2024 MY RAV4 [11/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): ECO Switch Circuit

NEXT

2.

CHECK REFRIGERANT PRESSURE

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Air Conditioner > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Regulator Pressure Sensor

Air conditioner pressure sensor

Min.: -456.6 kPaG (gauge)

Max.: 3294.3 kPaG (gauge)

Actual refrigerant pressure displayed
  • Refrigerant line (gas leak etc.)
  • Air conditioner pressure sensor system malfunction

Body Electrical > Air Conditioner > Data List

Tester Display

Regulator Pressure Sensor

(f) Install a manifold gauge set.

  • for HFC-134a (R134a): 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFC-134a(R134a)): ON-VEHICLE INSPECTION
  • for HFO-1234yf (R1234yf): 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFO-1234yf(R1234yf)): ON-VEHICLE INSPECTION 2019 - 2024 MY RAV4 RAV4 HV [02/2019 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFO-1234yf(R1234yf)): ON-VEHICLE INSPECTION

(g) Read the manifold gauge pressure when the following conditions are met.

(1) Prepare the vehicle according to the table below.

Measurement Condition:

Item

Condition

Vehicle Condition

Engine running

Doors

Fully closed (windows also fully closed)

A/C Switch

On

Recirculation/fresh Control Switch

Recirculation

Set Temperature

MAX COLD

Blower Speed

HI

Air Conditioning Air Inlet Temperature

25 to 35°C (77 to 95°F)

Standard Pressure:

Low pressure side

150 to 250 kPa (1.5 to 2.5 kgf/cm2, 22 to 36 psi)

High pressure side

1370 to 1570 kPa (14 to 16 kgf/cm2, 199 to 228 psi)

(h) Compare the values displayed in the Data List and on the manifold gauge.

OK:

The values displayed in the Data List and on the manifold gauge match.

NG

CHARGE SYSTEM WITH REFRIGERANT

  • for HFC-134a (R134a): 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFC-134a(R134a)): REPLACEMENT
  • for HFO-1234yf (R1234yf): 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFO-1234yf(R1234yf)): REPLACEMENT 2019 - 2024 MY RAV4 RAV4 HV [02/2019 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFO-1234yf(R1234yf)): REPLACEMENT

OK

3.

PERFORM ACTIVE TEST USING TECHSTREAM (SERVO PULSE)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) for Automatic Air Conditioning System:

(1) Check the operation by referring to the table below.

Body Electrical > Air Conditioner > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Air Mix Servo Targ Pulse(D)

No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) pulse

Min.: 128

Max.: 383

Operates between 165 to 257 pulses

Air Mix Servo Targ Pulse(P)

No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) pulse

Min.: 128

Max.: 383

Operates between 255 to 347 pulses

Body Electrical > Air Conditioner > Active Test

Tester Display

Air Mix Servo Targ Pulse(D)

Body Electrical > Air Conditioner > Active Test

Tester Display

Air Mix Servo Targ Pulse(P)

OK:

Damper servo motor is operated.

(f) for Manual Air Conditioning System:

(1) Check the operation by referring to the table below.

Body Electrical > Air Conditioner > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Air Mix Servo Targ Pulse(D)

No. 1 air conditioning radiator damper servo sub-assembly (air mix) pulse

Min.: 128

Max.: 383

Operates between 165 to 257 pulses

Body Electrical > Air Conditioner > Active Test

Tester Display

Air Mix Servo Targ Pulse(D)

OK:

Damper servo motor is operated.

Result

Proceed to

OK (for Automatic Air Conditioning System)

A

OK (for Manual Air Conditioning System)

B

NG

C
B

GO TO ON-VEHICLE INSPECTION

C

GO TO DTC OF APPLICABLE SERVO MOTOR OPERATING ABNORMALLY

A

4.

CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the H1 automatic light control sensor connector.

(b) Disconnect the G44 main body ECU (multiplex network body ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

H1-1 (CLTB) - G44-23 (CLTB)

Always

Below 1 Ω

H1-2 (CLTE) - G44-25 (CLTE)

Always

Below 1 Ω

H1-4 (CLTS) - G44-24 (CLTS)

Always

Below 1 Ω

H1-1 (CLTB) or G44-23 (CLTB) - Other terminals and body ground

Always

10 kΩ or higher

H1-2 (CLTE) or G44-25 (CLTE) - Other terminals and body ground

Always

10 kΩ or higher

H1-4 (CLTS) or G44-24 (CLTS) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

INSPECT AUTOMATIC LIGHT CONTROL SENSOR

(a) Remove the automatic light control sensor.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: REMOVAL

(b) Inspect the automatic light control sensor.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: ON-VEHICLE INSPECTION

OK

GO TO ON-VEHICLE INSPECTION

NG

REPLACE AUTOMATIC LIGHT CONTROL SENSOR 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; LIGHTING (EXT): AUTOMATIC LIGHT CONTROL SENSOR: REMOVAL