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Home >> Toyota >> 2014 >> Corolla L, Automatic Trans >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System (Manual A/C) - Diagnostics - Introduction (Model Code: ZRE172) >> AIR CONDITIONING SYSTEM (For Manual Air Conditioning System) >> How To Proceed With Troubleshooting [08/2013 - 08/2016] >> Procedure
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How To Proceed With Troubleshooting [08/2013 - 08/2016]: Procedure

  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result:  1

    NEXT 

    See step  2

  2. INSPECT BATTERY VOLTAGE 
    1. Inspect the battery voltage.

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  3

  3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
    1. Using the Techstream, check for CAN communication system DTCs.

      Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]

      Result

      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

    Result:  2

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 

    Result:  1

    See step  4

  4. CHECK FOR DTC* 
    1. Check for DTCs and note any codes that are output.

      Refer to DTC CHECK / CLEAR [08/2013 - ] 

      Body Electrical > Air Conditioner > Trouble Codes 

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2013 - ] 

      Body Electrical > Air Conditioner > Clear DTCs 

    3. Recheck for DTCs. Based on the DTCs output above, try to force output of the air conditioning system DTC by simulating the operation indicated by the DTC.

      Refer to DTC CHECK / CLEAR [08/2013 - ] 

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result:  2

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2013 - 08/2016]  

    Result:  1

    See step  5

  5. PROBLEM SYMPTOMS TABLE 
    1. Refer to Problem Symptoms Table.

      Refer to PROBLEM SYMPTOMS TABLE [08/2013 - 08/2016] 

      Result

      Result Proceed to
      Fault is not listed in Problem Symptoms Table A
      Fault is listed in Problem Symptoms Table B

    Result:  2

    GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2013 - 08/2016]  

    Result:  1

    See step  6

  6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Data List / Active Test

      Refer to DATA LIST / ACTIVE TEST [08/2013 - ] 

    2. Terminals of ECU

      Refer to TERMINALS OF ECU [08/2013 - ] 

    3. On-vehicle Inspection
    4. Inspection

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  7

  7. ADJUST, REPAIR OR REPLACE 

    Result

    Proceed to
    NEXT

    Result:  1

    NEXT 

    END