Ford Focus Service Manual: Acronyms and Definitions

Note:

This acronyms and definitions listing contains technical terms applicable to Ford Motor Company products. It is not intended to be an all-inclusive dictionary of components and their functions. If a detailed description of a particular system or component is desired, refer to the applicable section within this PC/ED Manual or refer to the Workshop Manual for additional information regarding the specific vehicle being repaired.

• 2V: Two valves per engine cylinder
• 3V: Three valves per engine cylinder
• 4V: Four valves per engine cylinder
• 4WD: Four Wheel Drive
• AAT: Ambient Air Temperature
• ABS: Anti-Lock Brake System
• APP: Accelerator Pedal Position
• A/T: Automatic Transmission
• AWD: All Wheel Drive
• BARO: Barometric Pressure
• BPP: Brake Pedal Position
• BTDC: Before Top Dead Center
• CAC: Charge Air Cooler
• CAN: Controller Area Network
• CCM: Comprehensive Component Monitor
• CF: Cooling Fan
• CHT: Cylinder Head Temperature
• CKP: Crankshaft Position
• CL: Closed Loop
• CMP: Camshaft Position
• CO: Carbon Monoxide
• CO₂: Carbon Dioxide
• COP: Coil On Plug
• CPP: Clutch Pedal Position
• CPU: Central Processing Unit
• CTO: Clean Tach Output
• CV: Canister Vent
• DBA: Driver Brake Application
• DC: 1. Direct Current 2. Duty Cycle
• DEPS: Dual Equal Phase Shifting
• DFI: Direct Fuel Injection
• DFSO: Deceleration Fuel Shut-Off
• DIPS: Dual Independent Phase Shifting
• DLC: Data Link Connector
• DTC: Diagnostic Trouble Code
• E10: Fuel containing 10% ethanol
• E85: Fuel containing 85% ethanol
• ECM: Electronic Control Module
• ECT: Engine Coolant Temperature
• EEC: Electronic Engine Control
• EEGR: Electric Exhaust Gas Recirculation
• EEPROM: Electrically Erasable Programmable Read-Only Memory
• EGR: Exhaust Gas Recirculation
• EI: Electronic Ignition
• EMD: Engine Manufacturers Diagnostics
• EMI: Electromagnetic Interference
• EONV: Engine Off Natural Vacuum
• EOT: Engine Oil Temperature
• EPS: Exhaust Phase Shifting
• E-Quizzer: Enhanced Quizzer
• ERFS: Electronic Returnless Fuel System
• ESM: EGR System Module
• ESOF: Electronic Shift-on-the-Fly
• ETB: Electronic Throttle Body
• ETBTACM: Electronic Throttle Body Throttle Actuator Control Motor
• ETBTPS: Electronic Throttle Body Throttle Position Sensor
• ETC: Electronic Throttle Control
• EVAP: Evaporative Emission
• EVAPCP: Evaporative Emission Canister Purge Valve
• FAOS: Fore-Aft Oxygen Sensor
• FEPS: Flash EEPROM Programming Signal
• FFV: Flexible Fuel Vehicle
• FLI: Fuel Level Input
• FMEM: Failure Mode Effects Management
• FP: Fuel Pump
• FPDM: Fuel Pump Driver Module
• FPM: Fuel Pump Monitor
• FRP: Fuel Rail Pressure
• FRPT: Fuel Rail Pressure Temperature
• FSS: Fan Speed Sensor
• FTP: Fuel Tank Pressure
• FWD: Front Wheel Drive
• GPM: 1. Grams per Mile 2. Gallons per Minute
• GTDI: Gasoline Turbocharged Direct Injection
• H: Hydrogen
• HC: 1. Hydrocarbon 2. High Compression
• HDR: High Data Rate
• HO2S: Heated Oxygen Sensor
• IAC: Idle Air Control
• IAT: Intake Air Temperature
• IFS: Inertia Fuel Shut-Off
• I/M: Inspection/Maintenance
• IMRC: Intake Manifold Runner Control
• IMTV: Intake Manifold Tuning Valve
• IPC: Independent Plausibility Checker
• IPS: Intake Phase Shifting
• ISO: International Standards Organization
• KAM: Keep Alive Memory
• KOEO: Key On Engine Off
• KOER: Key On Engine Running
• KS: Knock Sensor
• LCM: Lighting Control Module
• LDR: Low Data Rate
• LONGFT: Long-Term Fuel Trim
• MAF: Mass Airflow
• MAP: Manifold Absolute Pressure
• MAP/IAT2: Manifold Absolute Pressure/Intake Air Temperature 2
• MFF: Misfire Freeze Frame
• MIL: Malfunction Indicator Lamp
• MRFS: Mechanical Returnless Fuel System
• MSOF: Manual Shift-on-the-Fly
• M/T: Manual Transmission/Transaxle
• NMOG: Non-Methane Organic Gases
• NO_X: Nitrogen Oxides
• NVLD: Natural Vacuum Leak Detection
• NVM: Non-Volatile Memory
• NVRAM: Non-Volatile Random Access Memory
• OASIS: On-line Automotive Service Information System
• OBD: On Board Diagnostic
• OL: Open Loop
• ORVR: On-board Refueling Vapor Recovery
• OSC: Output State Control
• OSR: On-Board System Readiness
• OSS: Output Shaft Speed
• PATS: Passive Anti-Theft System
• PCM: Powertrain Control Module
• PCV: Positive Crankcase Ventilation
• Pd: Palladium
• PID: Parameter Identification
• PIP: Profile Ignition Pickup
• PPM: Parts per Million
• PSP: Power Steering Pressure
• Pt: Platinum
• PTO: Power Take-Off
• PTS: Professional Technician Society
• PWM: Pulse Width Modulation
• PZEV: Partial Zero Emission Vehicle
• RAM: Random Access Memory
• RFI: Radio Frequency Interference
• Rh: Rhodium
• ROM: Read-Only Memory
• RPM: Revolutions Per Minute
• RWD: Rear Wheel Drive
• SAE: Society of Automotive Engineers
• SCB: Supercharger Bypass
• SFI: Sequential Multiport Fuel Injection
• SHRTFT: Short-Term Fuel Trim
• TAC: Throttle Actuator Control
• TACM: Throttle Actuator Control Motor
• TC: Turbocharger
• TCBP/CACT: Turbocharger Boost Pressure/Charge Air Cooler Temperature
• TCBY: Turbocharger Bypass
• TCIL: Transmission Control Indicator Lamp
• TCM: Transmission Control Module
• TCS: Transmission Control Switch
• TCSS: Transfer Case Speed Sensor
• TDC: Top Dead Center
• TP: Throttle Position
• TPPC: Throttle Plate Position Controller
• TR: Transmission Range
• TSB: Technical Service Bulletin
• TWC: Three-Way Catalytic Converter
• VCT: Variable Camshaft Timing
• VECI: Vehicle Emission Control Information
• VID: Vehicle Identification
• VIN: Vehicle Identification Number
• VMV: Vapor Management Valve
• VR: Variable Reluctance
• VSS: Vehicle Speed Sensor
• WOT: Wide Open Throttle