Nissan Altima (L32) 2007-2012 Service Manual ≻ Heater & air conditioning control system manual air conditioner ≻ Function diagnosis Nissan Altima (L32) 2007-2012 Service Manual: Function diagnosis Function informationAir conditioner controlDiagnosis system (ECM) Inspection and adjustment Description & Conditions DESCRIPTION The purpose of the operational check is to confirm that the system operates properly. CONDITIONS: • Engine running and at normal operation temperature. ... Function information Component Part Location ENGINE COMPARTMENT 1. A/C compressor F3 2. Refrigerant pressure sensor E219 3. A/C relay (internal to IPDM E/R) 1. A/C compressor F3 2. Refrigerant pressure sensor E ...