C4 CHECK AIRFLOW OPERATION
Select the highest blower motor setting. While observing the airflow, select each of the airflow positions (panel, panel/floor, floor, floor/defrost, defrost).
Is the airflow directed to the correct outlets?
Yes | GO to C5 | |
|---|---|---|
No | GO to Pinpoint Test E | |
C5 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 driver and passenger temperature settings from the coldest to the warmest and back to the coldest.
Does the temperature change between very warm to cool?
Yes | GO to C6 | |
|---|---|---|
No | If the temperature does not get very warm, GO to Pinpoint Test F If the temperature does not change at all, GO to Pinpoint Test I | |
C6 VERIFY THE AIR CONDITIONING COMPRESSOR DOES NOT ENGAGE WITH A/C (AIR CONDITIONING) OFF
With the engine running and the A/C off, select panel mode. Select the coldest temperature setting.
Is the outlet temperature close to ambient air temperature?
Yes | GO to C7 | |
|---|---|---|
No | If the temperature is warmer than ambient air temperature, GO to Pinpoint Test I If the outlet temperature is significantly colder than ambient air temperature and the A/C compressor clutch is engaged, GO to Pinpoint Test H | |
C7 VERIFY THE A/C (AIR CONDITIONING) COMPRESSOR IS OPERATIONAL IN THE A/C (AIR CONDITIONING) MODE
Make sure the ambient air temperature is above 0°C (32°F). With the engine running, select panel mode. Press the A/C button (indicator on).
Is the A/C compressor operational when the panel and A/C button (indicator on) is pressed?
Yes | GO to C8 | |
|---|---|---|
No | GO to Pinpoint Test G | |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.