LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2011 >> Flex SE >> Repair and Diagnosis >> External Pages >> Different car >> Section 1871 (Climate Control System - General Information And Diagnostics) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test I: Unable to Duplicate the Customer Concern and No DTCs Present >> Pinpoint Test I: Unable To Duplicate The Customer Concern And No DTCS Present
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Pinpoint Test I: Unable To Duplicate The Customer Concern And No DTCS Present

WARNING: This page is about a different car, the 2012 Ford Flex. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Diagnose any HVAC module DTCs before carrying out the following pinpoint test.
NOTE: Some PCM DTCs may inhibit A/C operation. If any PCM DTCs are retrieved, diagnose those first. Refer to the PCM DTC Chart .
  1. I1 CHECK THE BLOWER MOTOR OPERATION 
    • Ignition ON.
    • Select PANEL mode.
    • Observe blower motor operation and select each blower motor speed.
    • Does the blower motor operate in all selections and change speed in each? 
      • Yes  : GO to I2.
      • No  : If the blower motor does not operate in any setting, GO to Pinpoint Test Q .

        If the blower motor does not properly change speeds or shut OFF, GO to Pinpoint Test R .

  2. I2 CHECK AIRFLOW OPERATION 
    • Select the highest blower motor setting.
      • NOTE: Refer to Description and Operation  for proper airflow descriptions.
    • While observing the airflow, select each of the airflow positions (PANEL, PANEL/FLOOR, FLOOR, FLOOR/DEFROST, DEFROST).
    • Is the airflow directed to the proper outlets? 
  3. I3 VERIFY TEMPERATURE CONTROL OPERATION 
    • Start the vehicle and allow it to reach normal operating temperature.
    • With the A/C OFF, select PANEL mode.
    • Change the temperature setting from the coldest to the warmest and back to the coldest.
    • Does the temperature change between very warm to cool? 
      • Yes  : GO to I4.
      • No  : If the temperature does not get very warm, GO to Pinpoint Test L .

        If the temperature does not change at all, GO to Pinpoint Test P .

  4. I4 VERIFY THE A/C CLUTCH DOES NOT ENGAGE WITH A/C OFF 
    • With the A/C OFF, select PANEL mode.
    • Select the coldest temperature setting.
    • Select a medium-low blower speed.
    • Is the outlet temperature close to ambient temperature? 
      • Yes  : GO to I5.
      • No  : If the temperature is warmer than ambient temperature, GO to Pinpoint Test P  and diagnose for inoperative blend door.

        If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch cycles normally, GO to Pinpoint Test O .

        If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch is engaged and does not cycle, GO to Pinpoint Test N .

  5. I5 VERIFY A/C CLUTCH ENGAGEMENT IN THE A/C MODE 
    • Make sure the ambient air temperature is above 2°C (35°F).
    • Select PANEL mode.
    • Press the A/C button (indicator ON).
    • Does the A/C clutch engage when the PANEL and A/C button (indicator ON) is pressed? 
  6. I6 CHECK THE RECIRC OPERATION 
    • Press the RECIRC button (indicator OFF).
    • Select PANEL mode.
    • Select the highest blower motor setting.
    • Observe airflow noise.
    • Press the RECIRC button (indicator ON).
    • Does the airflow noise increase when the RECIRC mode is selected (indicator ON)? 
  7. I7 CHECK THE AUXILIARY BLOWER MOTOR OPERATION 
    • Using the front and rear auxiliary blower motor controls, observe blower motor operation and select each auxiliary blower motor speed.
    • Does the auxiliary blower motor operate in all selections and change speed in each? 
      • Yes  : GO to I8.
      • No  : If the auxiliary blower motor does not operate in any setting, GO to Pinpoint Test S .

        If the auxiliary blower motor does not properly change speeds or shut OFF using both the front and rear auxiliary controls, GO to Pinpoint Test T .

        If the auxiliary blower motor does not properly change speeds or shut OFF using the rear auxiliary controls only, GO to Pinpoint Test W .

  8. I8 VERIFY AUXILIARY TEMPERATURE/MODE OPERATION 
    • Select the highest auxiliary blower motor setting.
    • Using the front and rear auxiliary controls, change the temperature/mode setting from the coldest to the warmest/floor and back to the coldest/overhead.
    • Does the temperature change between very warm to cool and auxiliary airflow to the floor when warm is selected and headliner when cool is selected? 
      • Yes  : The system is operating normally.
      • No  : If the auxiliary temperature control is inoperative/does not operate correctly from the front/rear auxiliary controls, GO to Pinpoint Test U .

        If the auxiliary temperature control is inoperative/does not operate correctly from the front auxiliary controls only, INSTALL a new HVAC module. REFER To CLIMATE CONTROL . TEST the system for normal operation.

        If the auxiliary temperature control is inoperative/does not operate correctly from the rear auxiliary controls only, GO to Pinpoint Test W .

        If the auxiliary panel/floor control is inoperative/does not operate correctly from the front/rear auxiliary controls, GO to Pinpoint Test V .

        If the auxiliary panel/floor control is inoperative/does not operate correctly from the front auxiliary controls only, INSTALL a new HVAC module. REFER to CLIMATE CONTROL . TEST the system for normal operation.

        If the auxiliary panel/floor control is inoperative/does not operate correctly from the rear auxiliary controls only, GO to Pinpoint Test W .

scientia non olet · About LEMON Manuals