Motorcraft® Home Technical Resources Home Non-Subscription Resources What's New Body Repair Manuals Diagnostic Tool Support OBDII Theory & Operation Owner Guides Paper/CD Manuals Quick Guides Tools & Equipment Membership Accounts My Shopping Cart Subscription Products Keycode Lookup Reprogramming & Initialization Service Publications Technical Service Bulletins Technical Training Purchase Subscription Ford Specific Acronyms # A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  0-9  (Indexed by Abbreviation) Acronyms Description A/C Air Conditioning A/CC Air Conditioning Clutch A/CCR A/C Clutch Control Relay A/D Analog-to-Digital. Analog-to-Digital signal conversion. A/T Automatic Transmission ABS Anti-Lock Brake System ACCS Air Conditioning Cycling Switch ACD Air Conditioning Demand. A signal input to the PCM from the air conditioning control panel. ACDS Air Conditioning Diagnostic Switch (refrigerant containment switch) ACET Air Conditioning Evaporator Temperature (may also be referred to as Evaporator Air Discharge Temperature) ACP Air Conditioning Head Pressure or A/C cycling switch input state ACP V Air Conditioning Pressure Volts. A voltage input to the PCM from the ACP switch or sensor. ACPSW Air Conditioning Pressure Switch ACPT Air Conditioning Pressure Transducer (Switch) ADC See ATDC. AFCM Alternative Fuel Control Module AIR Secondary Air Injection Air Diverter Air Diverter Valve. Part of the EAIR system. Diverts fresh air to the exhaust system when the electric air pump is commanded on. AIR EVAL Air System Evaluated. Displays a YES or NO status indicating whether the Air System has been evaluated for OBD (On-Board Diagnostic) purposes. Air/Fuel Ratio Air-to-fuel mixture ratio. An air-to-fuel mixture that is 14.7 AIRB Secondary Air Injection Bypass AIRM Secondary AIR pump monitor ALTCOM Alternator Command ALTMON Alternator Monitor Ambient Air Temperat Temperature of the air surrounding an object. Analog (Electrical/E An electrical signal that may obtain any value within the voltage limits of the signal. APP Accelerator Pedal Position ARB Air Resource Board ARPMDES Ancillary RPM Desired. RPM required to maintain the vehicle speed commanded by the Speed Control Command Switch (SCCS) inputs. ASCII American Standard Code Information Interchange. ATDC After Top Dead Center. The location of the piston after it has reached the top of its stroke. Measured in degrees of crankshaft rotation. AWD All-Wheel Drive

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