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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Heating, Air Conditioning & Ventilation - With Diagnostics) >> Automatic A/C Diagnosis >> Symptom Procedures >> INSPECTION PROCEDURE 2: Cool air does not come >> Diagnosis

INSPECTION PROCEDURE 2: Cool air does not come: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. STEP 1. Check the blower operation 

    Check that air blows through the air outlets.

    1. Turn the ignition switch to the ON position.
    2. Blower knob: Other than OFF
    3. Check that the air comes out of the blower.

    Q: Is the check result normal? 

    1. YES:  Go to Step 2.
    2. NO:  Refer to INSPECTION PROCEDURE 3 "THE BLOWER DOES NOT WORK  ".
  2. STEP 2. Check the A/C compressor operation 

    Check that the compressor operates under the following conditions.

    • Engine operation
    • Air conditioning switch: ON
    • Blower knob: Maximum air volume
    • Temperature control dial: 18° C (MAX COOL)
    NOTE: The compressor does not work when the blower intake temperature is 0° C or less.

    Q: Is the check result normal? 

    1. YES:  Go to Step 3.
    2. NO:  Refer to INSPECTION PROCEDURE 6 "THE A/C COMPRESSOR DOES NOT WORK  ",
  3. STEP 3. Using scan tool (M.U.T.-III), diagnose the CAN bus line 
    CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
    1. Connect scan tool (M.U.T.-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)
    2. Turn the ignition switch to the "ON" position.
    3. Diagnose the CAN bus line.
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the CAN bus line found to be normal? 

    1. YES:  Go to Step 4.
    2. NO:  Repair the CAN bus line (Refer to DIAGNOSIS ).
  4. STEP 4. Using scan tool (M.U.T.-III), DTC check 

    Check that the diagnostic trouble code related to the air conditioning is not stored.

    Q: Is the diagnostic trouble code stored? 

    1. YES:  Carry out the diagnostic trouble code procedures. Refer to DIAGNOSTIC TROUBLE CODE CHART  .
    2. NO:  Go to Step 5.
  5. STEP 5. Refrigerant level check 

    Check that the refrigerant level is adequate. Refer to REFRIGERANT LEVEL CHECK, DRAINING AND CHARGING  .

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO:  Charge or remove the refrigerant level. Refer to REFRIGERANT LEVEL CHECK, DRAINING AND CHARGING  .
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