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Home >> Toyota >> 2021 >> Camry TRD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System (Auto A/C) - Diagnostic Codes (2 Of 2) & Symptom Tests (Except Hybrid) >> AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) >> Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [03/2017 - 06/2017] >> Procedure

Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [03/2017 - 06/2017]: Procedure

  1. CHECK WHEN MALFUNCTION OCCURS 

    Result

    Result  Proceed to
    When using cooling function A
    When using heater function B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  2

  2. PERFORM REFRIGERANT SHORTAGE CHECK 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    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
      A/C switch On
      Ambient temperature* 0 to 49°C (32 to 120°F)
      Blower speed HI

      *: If the ambient temperature is not within the range shown, do not perform this check.

      Result

      Result Amount of Refrigerant
      Refrigerant correct Correct
      Refrigerant shortage Insufficient

      OK

      "Refrigerant correct" is displayed on Techstream.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CHARGE SYSTEM WITH REFRIGERANT. Refer to  REPLACEMENT [03/2017 - ] 

    Result: 

    OK 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      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*1 or air mix*2) 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*1 Min.: 128
      Max.: 383      		 Operates between 255 to 347 pulses
      Air Outlet Servo Pulse (D) No. 1 air conditioning radiator damper servo sub-assembly (mode) pulse Min.: 128
      Max.: 383      		 Operates between 241 to 348 pulses
      Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly pulse Min.: 128
      Max.: 383      		 Operates between 220 to 256 pulses
      A/O Servo Pulse (Rr D) No. 2 air conditioning radiator damper servo sub-assembly pulse*1 Min.: 128
      Max.: 383      		 Operates between 158 to 260 pulses
      1. *1: for Dual Type
      2. *2: for Single Type

      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)

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      Air Outlet Servo Pulse (D)

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      Air Inlet Damper Targ Pulse

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      A/O Servo Pulse (Rr D)

      OK

      Each damper servo motor operates.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR. Refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2017 - 06/2017] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the M1 automatic light control sensor connector.
    2. Disconnect the K52 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
      M1-1 (CLTB) - K52-23 (CLTB) Always Below 1 Ω
      M1-2 (CLTE) - K52-25 (CLTE) Always Below 1 Ω
      M1-4 (CLTS) - K52-24 (CLTS) Always Below 1 Ω
      M1-1 (CLTB) or K52-23 (CLTB) - Other terminals and body ground Always 10 kΩ or higher
      M1-2 (CLTE) or K52-25 (CLTE) - Other terminals and body ground Always 10 kΩ or higher
      M1-4 (CLTS) or K52-24 (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 [03/2017 - 06/2017]

    2. Inspect the automatic light control sensor.

      Refer to ON-VEHICLE INSPECTION [03/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET. Refer to  ON-VEHICLE INSPECTION [03/2017 - ] 

    Result: 

    NG 

    REPLACE AUTOMATIC LIGHT CONTROL SENSOR. Refer to  REMOVAL [03/2017 - 06/2017] 

  6. BLEED AIR FROM COOLING SYSTEM 

    Refer to REPLACEMENT [03/2017 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  7

  7. CHECK OPERATION (AIR CONDITIONING SYSTEM) 
    1. Set the same temperature for the left and right sides and check that the air that blows from the left and right front registers is the same temperature.

      OK

      The air from the left and right front registers is the same temperature.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (MALFUNCTION DUE TO AIR IN COOLING SYSTEM) 

    Result: 

    NG 

    See step  8

  8. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      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*1 or air mix*2) 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*1 Min.: 128
      Max.: 383      		 Operates between 255 to 347 pulses
      Air Outlet Servo Pulse (D) No. 1 air conditioning radiator damper servo sub-assembly (mode) pulse Min.: 128
      Max.: 383      		 Operates between 241 to 348 pulses
      Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly pulse Min.: 128
      Max.: 383      		 Operates between 220 to 256 pulses
      A/O Servo Pulse (Rr D) No. 2 air conditioning radiator damper servo sub-assembly pulse*1 Min.: 128
      Max.: 383      		 Operates between 158 to 260 pulses
      1. *1: for Dual Type
      2. *2: for Single Type

      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)

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      Air Outlet Servo Pulse (D)

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      Air Inlet Damper Targ Pulse

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      A/O Servo Pulse (Rr D)

      OK

      Each damper servo motor operates.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY. Refer to  DISASSEMBLY [03/2017 - 10/2020] 

    Result: 

    NG 

    GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR. Refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2017 - 06/2017] 

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