AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) No Cool Air Comes Out

DESCRIPTION

If warm air blows from the registers regardless of the temperature setting of the air conditioning system, the following factors may be the cause.

Symptom Factor

No cool air comes out


  • (Blower control is normal)

  • Compressor assembly with pulley (compressor solenoid) malfunction

  • Refrigerant pressure is extremely high or low

  • Refrigerant volume (low)

  • Clogged cooler condenser assembly fins

  • Cooling fan system malfunction

  • Mechanical locking of damper and damper link

  • No. 1 cooler thermistor malfunction

  • High inlet air temperature

PROCEDURE


  1. CHECK AIR CONDITIONING CONTROL ASSEMBLY


    1. Operate each switch on the air conditioning control assembly and check that the switch indicators operate normally.

      OK
      All switch indicators operate normally.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO OTHER DIAGNOSIS PROCEDURE (Operation not Accepted Even If Air Conditioning Switch is Operated) Click here

    OK

  2. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      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

        for LHD:

      • Operates between 165 to 257 pulses


        for RHD:

      • Operates between 255 to 347 pulses

      Body Electrical > Air Conditioner > Active Test
      Tester Display
      Air Mix Servo Targ Pulse(D)
      OK
      The No. 1 air conditioning radiator damper servo motor operates.
      Result
      Proceed to
      OK
      NG

    OK

    INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET Click here

    NG

    GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR Click here