LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 64 (Heating / Air Conditioning System (HV) - Diagnostic Codes (3 Of 3) & Symptom Tests) >> AIR CONDITIONING SYSTEM (for HV Model) >> Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [11/2018 - 02/2019] >> Procedure

Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [11/2018 - 02/2019]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK MALFUNCTION STATUS 

    Result

    Result  Proceed to
    While cooling A
    While heater B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  2

  2. CHECK REFRIGERANT SHORTAGE 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check.

      Body Electrical > Air Conditioner > Utility 

      Tester Display
      Refrigerant Gas Volume Check
    5. Check that the following conditions are met and perform the refrigerant shortage check according to the display on the Techstream.
      MEASUREMENT CONDITION:

      Item Condition
      Vehicle Condition Power switch on (READY)
      A/C Switch On
      Ambient Temperature*1 0 to 49°C (32 to 120°F)
      Air Conditioning Air Inlet Temperature*2 25 to 35°C (77 to 95°F)
      Set Temperature MAX COLD
      Recirculation/fresh Control Switch Recirculation
      Air Vent Damper Position FACE
      Blower Speed HI

      HINT: 

      • Refer to the Techstream operator's manual for further details.
      • A message indicating a refrigerant shortage is displayed on the Techstream and the air conditioning system turns off if the amount of refrigerant in the system is insufficient.
      • DTCs are not stored when performing the refrigerant shortage check using the Techstream.
      • *1: This inspection can be judged correctly only if the ambient temperature is within a range of 0 to 49°C (32 to 120°F). Therefore, postpone the test if the temperature is low.
      • *2: This inspection can be judged correctly only if the air inlet temperature is within a range of 25 to 35°C (77 to 95°F). Therefore, postpone the test if the temperature is out of range.

      Result

      Result Amount of Refrigerant
      Refrigerant shortage Insufficient or leakage
      Refrigerant correct Correct

      OK

      "Refrigerant correct" is displayed on Techstream.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CHARGE SYSTEM WITH REFRIGERANT 

    1. for HFC-134a (R134a): Refer to REPLACEMENT [11/2018 - 08/2020]
    2. for HFO-1234yf (R1234yf): Refer to REPLACEMENT [11/2018 - 02/2019]

    Result: 

    OK 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM (SERVO PULSE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
    5. 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.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO DTC OF APPLICABLE SERVO MOTOR OPERATING ABNORMALLY 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2018 - 02/2019]

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the H1 automatic light control sensor connector.
    2. Disconnect the G44 main body ECU (multiplex network body ECU) connector.
    3. 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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. INSPECT AUTOMATIC LIGHT CONTROL SENSOR 
    1. Remove the automatic light control sensor.

      Refer to REMOVAL [11/2018 - 02/2019]

    2. Inspect the automatic light control sensor.

      Refer to ON-VEHICLE INSPECTION [11/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    GO TO ON-VEHICLE INSPECTION 

    Refer to PROCEDURE - Step 2

    Result: 

    NG 

    REPLACE AUTOMATIC LIGHT CONTROL SENSOR 

    Refer to REMOVAL [11/2018 - 02/2019]

  6. BLEED AIR FROM COOLANT 

    Refer to REPLACEMENT [11/2018 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  7

  7. CHECK OPERATION (AIR CONDITIONING SYSTEM) 
    1. Check that there is not a difference in temperature between the left and right air outlets.

      OK

      There is not a difference in temperature between the left and right air outlets.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (FAILURE DUE TO AIR ENTERING COOLANT) 

    Result: 

    NG 

    See step  8

  8. PERFORM ACTIVE TEST USING TECHSTREAM (SERVO PULSE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
    5. 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) operation 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) operation 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.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY 

    Refer to DISASSEMBLY [11/2018 - 02/2019]

    Result: 

    NG 

    GO TO DIAGNOSTIC TROUBLE CODE CHART (FOR SERVO MOTOR OF APPLICABLE ABNORMAL OPERATION) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2018 - 02/2019]

scientia non olet · About LEMON Manuals