Some 2010 Mustang vehicles built prior to 6/22/2009 and equipped with a 4.6L/5.4L V8 engine may exhibit a lack of A/C cooling. A calibration is available to correct A/C clutch cycling that may occur under a low refrigerant charge condition.
Follow the Service Procedure steps to correct the condition.
Follow Workshop Manual (WSM), Section 412-00 to diagnose and correct any A/C lack of cooling before continuing with this procedure.
Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 61.16 and higher or 62.04 and higher. This new calibration is not included in the VCM 2009.7 DVD. Calibration files may also be obtained at www.motorcraft.com.
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.