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Pinpoint Test E: Unable to Duplicate Customer Concern and No DTCs Present

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following: 



NOTE: Diagnose any PCM, HVAC module or Air Conditioning Compressor Module (ACCM) DTCs before carrying out the following pinpoint test.
  1. E1 HVAC MODULE AND A/C COMPRESSOR SELF-TEST 
    NOTE: If sent to this pinpoint test from the HVAC Module and A/C Compressor Self-Test, GO to step E2  .
    1. Yes  : GO to E2.
    2. No  : Follow the actions within the HVAC Module and A/C Compressor Self-Test.
  2. E2 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? 
    1. Yes  : GO to E3.
    2. No  : If the blower motor does not operate in any setting, GO to PINPOINT TEST K .

      If the blower motor does not properly change speeds or shut OFF, GO to PINPOINT TEST L .

  3. E3 CHECK AIRFLOW OPERATION 
    • Select the highest blower motor setting.
      • NOTE: Refer to DESCRIPTION AND OPERATION  in this service information 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? 
    1. Yes  : GO to E4.
    2. No  : REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS -- FUSION, MILAN & MKZ (EXCEPT HYBRID) article and DIAGNOSE for incorrect/erratic direction of airflow from outlets.
  4. E4 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? 
    1. Yes  : GO to E5.
    2. No  : If the temperature does not get very warm or heat is erratic, GO to PINPOINT TEST H .

      If the temperature does not change at all, REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS -- FUSION, MILAN & MKZ (EXCEPT HYBRID) article and DIAGNOSE for temperature control is inoperative/does not operate correctly.

  5. E5 VERIFY NO A/C COMPRESSOR OPERATION WITH A/C OFF 
    • With the A/C OFF, select PANEL mode.
    • Select the coldest temperature setting.
    • Is the outlet temperature close to ambient temperature? 
    1. Yes  : GO to E6.
    2. No  : If the temperature is warmer than ambient temperature, REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS -- FUSION, MILAN & MKZ (EXCEPT HYBRID) article and DIAGNOSE for temperature control is inoperative/does not operate correctly.

      If the outlet temperature is significantly colder than ambient temperature, GO to PINPOINT TEST J .

  6. E6 VERIFY A/C OPERATION 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 operate when the PANEL and A/C button (indicator ON) is pressed? 
    1. Yes  : GO to E7.
    2. No  : GO to PINPOINT TEST I .
  7. E7 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)? 
    1. Yes  : GO to E8.
    2. No  : GO to PINPOINT TEST G .
  8. E8 CHECK IN-VEHICLE TEMPERATURE/HUMIDITY SENSOR FAN OPERATION 
    • Make sure the ambient air temperature is above 2°C (35°F).
    • Select PANEL mode.
    • Press the A/C button (indicator ON).
    • Place a piece of tissue within 25 mm (1 in) of the in-vehicle temperature/humidity sensor opening.
      Fig 1: Locating Tissue On In-Vehicle Temperature/Humidity Sensor Opening
      G06262704Courtesy of FORD MOTOR CO.
    • Is the tissue drawn to the sensor opening? 
    1. Yes  : GO to E9.
    2. No  : GO to PINPOINT TEST F .
  9. E9 CHECK AUXILIARY COOLANT FLOW PUMP OPERATION 
    • Allow the vehicle to cool to ambient temperature.
    • Start the engine and let the engine idle until it shuts down automatically,
    • Select FLOOR mode.
    • Set the temperature to the warmest setting.
    • Select the highest blower motor setting.
    • Does the discharge air temperature closely maintain its warm temperature for an extended period of time? 
    1. Yes  : The system is operating normally.

      If sent here for reduced airflow, CHECK the cabin air filter. If the cabin air filter is dirty, INSTALL a new cabin air filter. TEST the system for normal operation. If reduced airflow is still observed or the cabin air filter is clean, GO to PINPOINT TEST L .

    2. No  : GO to PINPOINT TEST H .
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