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 part within this article or refer to the appropriate Diagnostic Information and Service Information articles 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

ABS: Anti-Lock Brake System

A/C: Air Conditioning

A/CC: Air Conditioning Clutch

A/CCR: Air Conditioning Clutch Control Relay

ACCS: Air Conditioning Cycling Switch

ACET: Air Conditioning Evaporator Temperature

ACP: Air Conditioning Pressure

A/D: Analog-to-Digital

APP: Accelerator Pedal Position

BARO: Barometric Pressure

BJB: Battery Junction Box

BPP: Brake Pedal Position

BPS: Brake Pedal Switch

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

CO 2 : 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

DFSO: Deceleration Fuel Shut-Off

DIPS: Dual Independent Phase Shifting

DLC: Data Link Connector

DMM: Digital Multimeter

DRI: Deposit Resistant Injector

DTM: Diagnostic Test Mode

DTC: Diagnostic Trouble Code

E10: Fuel containing 10% ethanol

E85: Fuel containing 85% ethanol

EATC: Electronic Automatic Temperature Control

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

EPC: Electronic Pressure Control

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 Canister Purge Valve

FAOS: Fore-Aft Oxygen Sensor

FC: Fan Control

FCIL: Fuel Cap Indicator Lamp

FEPS: Flash EEPROM Programming Signal

FFV: Flexible Fuel Vehicle

FLI: Fuel Level Input

FMEM: Failure Mode Effects Management

FP: Fuel Pump

FPC: Fuel Pump Control

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

H: Hydrogen

HC: 1. Hydrocarbon 2. High Compression

HDR: High Data Rate

HLOS: Hardware Limited Operating Strategy

HO2S: Heated Oxygen Sensor

Hz: Hertz

IAC: Idle Air Control

IAT: Intake Air Temperature

IAT2: Intake Air Temperature 2

IDM: Ignition Diagnostic Monitor

IDS: Integrated Diagnostic System

IFS: Inertia Fuel Shut-Off

I/M: Inspection/Maintenance

IMRC: Intake Manifold Runner Control

IMRCM: Intake Manifold Runner Control Monitor

IMTV: Intake Manifold Tuning Valve

INJ: Injector

IPC: Independent Plausibility Checker

IPS: Intake Phase Shifting

ISO: International Standards Organization

KAM: Keep Alive Memory

KAPWR: Keep Alive Power

KOEO: Key On Engine Off

KOER: Key On Engine Running

Km/h: Kilometers per Hour

kPa: Kilopascal

KS: Knock Sensor

L: Liters

LDR: Low Data Rate

LONGFT: Long-Term Fuel Trim

LOS: Limited Operating Strategy

MAF: Mass Air Flow

MAP: Manifold Absolute Pressure

MFF: Misfire Freeze Frame

MIL: Malfunction Indicator Lamp

MRFS: Mechanical Returnless Fuel System

MSOF: Manual Shift-on-the-Fly

N: Nitrogen

NMOG: Non-Methane Organic Gases

NO _X : Oxides of Nitrogen

NVM: Non-Volatile Memory

NVRAM: Non-Volatile Random Access Memory

OASIS: On-line Automotive Service Information System

OHC: Overhead Cam

OL: Open Loop

OSC: Output State Control

OSR: On-Board System Readiness

OTM: Output Test Mode

PATS: Passive Anti-Theft System

PCM: Powertrain Control Module

PCM-VSO: Powertrain Control Module - Vehicle Speed Output

PCV: Positive Crankcase Ventilation

PCVTE: Positive Crankcase Ventilation Thermal Extension

Pd: Palladium

PDJB: Power Distribution Junction Box

PID: Parameter Identification

PIP: Profile Ignition Pickup

PPM: Parts per Million

PS: Pressure Switch

PSP: Power Steering Pressure

PSPT: Power Steering Pressure Transducer

Pt: Platinum

PTO: Power Take-Off

PTS: Professional Technician Society

PWM: Pulse Width Modulation

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

SJB: Smart Junction Box

SMR: Starter Motor Request

TAC: Throttle Actuator Control

TACM: Throttle Actuator Control Motor

TCM: Transmission Control Module

TCSS: Transfer Case Speed Sensor

TDC: Top Dead Center

TP: Throttle Position

TPPC: Throttle Plate Position Controller

TSB: Technical Service Bulletin

TWC: Three Way Catalytic Converter

VCM: Vehicle Communication Module

VCT: Variable Camshaft Timing

VECI: Vehicle Emission Control Information

VID: Vehicle Identification

VIN: Vehicle Identification Number

VMV: Vapor Management Valve

VR: Variable Reluctance

WOT: Wide Open Throttle

Transmissions:

NOTE: The automatic transmission naming convention is as follows:

The first character, a number, is the number of forward gears.
The second character, either the letter F or R, represents front (transaxle) or rear (transmission) wheel drive.
The next set of characters, a grouping of numbers, represents the design torque capacity of the transmission/transaxle.
The last character, if used, is one of the following:
E for electronic shift
N for non-synchronous shift
S for synchronous shift
W for wide ratio

As an example, for the 4F27E transaxle, the number of forward gears is 4, the character F indicates front transaxle, 27 represents 270 ft-lbs of torque capacity and the character E represents an electronic shift.

A/T: Automatic Transmission

CCS: Coast Clutch Solenoid

EPC: Electronic Pressure Control

ESS: Electronic Shift Scheduling

ISS: Intermediate/Input Shaft Speed Sensor

M/T: Manual Transmission/Transaxle

OCS: Overdrive Cancel Switch

OSS: Output Shaft Speed

PNP: Park/Neutral Position switch

SSA/SSB/SSC/SSD/SSE: Shift Solenoids

SS1/SS2/SS3: Shift Solenoids

TCC: Torque Converter Clutch

TCIL: Transmission Control Indicator Lamp

TCS: Transmission Control Switch

TFT: Transmission Fluid Temperature

TR: Transmission Range

TSS: Turbine Shaft Speed

VSS: Vehicle Speed Sensor