Acronyms

- A -

• AAR: Automatic air recirculation 

• AB - Air Bleed

• ABDC - After Bottom Dead Center

• ABPV or ABV - Air Bypass Valve

• ABS - Anti-lock Brake System

• ABSV: Air Bypass Solenoid Valve 

• AC - Alternating Current

• A/C - Air Conditioner or Air Conditioning

• ACCC - A/C Compressor Clutch

• ACCCS - A/C Clutch Cycling Switch

• ACL BI-Met - Air Cleaner Bimetal sensor

• ACL DV - Air Cleaner Duct and Valve Vacuum motor

• ACT - Air Charge Temperature sensor

• ACV - Air Control Valve

• ACV: Actual cashed value 

• ALCL: Assembly Line Communications Link 

• ALDL: Assembly Line Data Link 

• AM: Amplitude modification 

• APO: All power options  

• APS: Absolute Pressure Sensor 

• APS: Atmospheric Pressure Sensor 

• ASC: Automatic stability control 

• ASCT: Automatic stability control traction  

• ASDM: Airbag System Diagnostic Module 

• ARAK: Active rear axle kinematics 

• ADS - Association of Diesel Specialists

• AEA - Automotive Electric Association

• AERA - Automotive Engine Rebuilders Association

• A/F - Air/fuel

• AFB - Aluminum Four-Barrel (carburetor)

• ACTS: Air Charge Temperature Sensor 

• ADC: Automatic damping control

• AEV: Automatic enrichment vehicle 

• AEI: Integrated electronic injection 

• AFC - Air-Flow Controlled

• AFR - Air/fuel ratio

• AFS - Air Flow Sensor

• A/F: Air/Fuel Ratio 

• AFC: Air Flow Control 

• AFM: Air Flow Meter 

• AI - Air Injection

• AICV - Air Injection Check Valve

• AIR-CHV - Air Check Valve

• AIR-DV - Air Diverter Valve

• AIR-IVV - Air Idle Vacuum Valve

• AIS - Air Injection System

• AIS - Automatic Idle Speed Motor

• AIV - Air Injection Valve

• AMGV - Air Management Valve

• AMS - Air Management System

• ANTBV - Anti-Backfire valve

• APDV - Air Pump Diverter Valve

• API - American Petroleum Institute

• AS - Airflow Sensor

• ASC - Automatic Stability Control

• ASE - Automotive Service Excellence

• ASIA - Automotive Service Industry Association

• ASME - American Society of Mechanical Engineers

• ASRV - Air Switching Relief Valve

• ASS - Air Switching Solenoid

• ASV - Air Switching Valve

• ATA - American Trucking Association

• AT: Automatic transmission 

• A/T: Automatic Transmission 

• ATC: Adaptive transmission control 

• ATF - Automatic transmission fluid

• ATS - Air Temperature Sensor

• ATDC: After Top Dead Center 

• AW: Alloy wheels 

• AWD - All-wheel-drive

​

- B -

• BBDC - Before Bottom Dead Center

• BCDD - Boost-Controlled Deceleration Device

• BCI - Battery Council International

• BDC - Bottom dead center

• Bhp - Brake horsepower

• BHS - Bi-Metal Heat Sensor

• BMAP - Barometric and Manifold Absolute Pressure sensor​​

• BP - Barometric Pressure sensor

• BPA - By-Pass Air solenoid

• BPEGR - Backpressure EGR

• BPS - Barometric Pressure Sensor

• BTU - British Thermal Unit

• BV - Bowl Vent port

• BVT - Backpressure Variable Transducer​

• B+: Battery Positive Voltage 

• BT: British Thermal Units

• BARO: Barometric Pressure

• BAS: Braking assists system

• BAT: Battery

• BCM: Body Control Module 

• BDC: Bottom dead center

• BHP: Brake Horse Power

• BMAP: Barometric/Manifold Absolute Pressure Sensor 

• BPS: Back pressure Sensor

•  BPT: Back Pressure Transducer 

• BTDC: Before Top Dead Center

• BTU: British Thermal Units  

- C -

• C-3 - Computer Command Control system

• C-4 - Computer Controlled Catalytic Converter system

• C: Celsius 

• C3I: Computer Controlled Coil Ignition

• CAB: Cabriolet / Convertible

• CAM - Choke Air Modulator switch

• CANP - Canister Purge solenoid

• CAD: Computer aided design 

• CAS - Cleaner Air System

• CAT - Catalytic Converter

• CAV - Coasting Air Valve

• CBVV - Carburetor Bowl Vent Valve

• CC - Catalytic Converter

• CCC - Computer Command Control; Converter Clutch Control solenoid

• CCEGR - Coolant Controlled Exhaust Gas Recirculation

• CCEVS - Coolant Controlled Engine Vacuum Switch

• CCIE - Coolant Controlled Idle Enrichment

• CCO - Converter Clutch Override

• CCS - Controlled Combustion System

• CCT - Computer Controlled Timing

• CCV - Closed Crankcase Ventilation system

• CEC - Combined Emission Control system; Computerized Emission Control system;

• Combination Emission Control

• CES - Clutch Engine Switch

• CI - Cubic Inches

• CID - Cubic Inch Displacement

• CIS - Continuous Injection System

• CKV - Check Valve

• CLC - Converter Lock-up Clutch

• CO - Carbon Monoxide

• CO2 - Carbon Dioxide

• COC - Conventional Oxidation Catalyst

• CP - Crankshaft Position sensor

• CPRV - Canister Purge Regulator Valve

• CPS - Canister Purge Solenoid

• CPV - Canister Purge Valve

• CRV - Coasting Richener Valve

• CSOV - Canister purge Shut Off Valve

• CSSA - Cold Start Spark Advance system

• CSSH - Cold Start Spark Hold system

• CTAV - Cold Temperature Activated Vacuum

• CTO - Coolant Temperature Override switch

• CTS - Coolant Temperature Sensor; Coolant Temperature Switch

• CTVS - Choke Thermal Vacuum Switch

• CV - Check Valve

• CWM - Cold Weather Modulator

• CALPAK: Calibration Pack 

• CAN: Controller Area Network 

• ANP: Canister Purge Solenoid Valve 

• CAS: Crank Angle Sensor 

• CBC: Cornering brake control 

• CC: Cubic Centimeter 

• CD: Drag coefficient 

• CDI: Capacitor Discharge Ignition 

• CEAB: Cold Engine Air Bleed 

• CECU: Central Electronic Control Unit 

• CER: Cold Enrichment Rod 

• CESS: Cold Engine Sensor Switch 

• CFI: Central Fuel Injection

• CFI: Continuous Fuel Injection 

• CFM: Cubic Feet Per Minute 

• CID: cylinder identification sensor 

• CID: Cubic Inch Displacement 

• CIS: Continuous Injection System 

• CKP: Crankshaft Position Sensor 

• CMP: Camshaft Position Sensor 

• CO: Carbon Monoxide 

• CO2: Carbon Dioxide 

• COP: Coil On Plug ignition 

• CPE: Coupe 

• CPI: Central Port Injection 

• CPU: Central Processing Unit 

• CSSA: Cold Start Spark Advance 

• CSSH: Cold Start Spark Hold 

• CTS: Coolant Temperature Sensor 

• CTVS: Choke Thermal Vacuum Switch 

• CVR: Control Vacuum Regulator 

• CVT: Continuously variable transmission 

​

- D -

• DBC - Dual-Bed Catalytic Converter

• DC - Direct current

• DEFI - Digital Electronic Fuel Injection

• DFS - Deceleration Fuel Shut-off

• DIS - Distributorless Ignition System

• DLV - Delay Valve

• DP - Dashpot

• DPDT - A double-pole, double-throw switch

• DPST - A double-pole, single-throw switch

• DRB II - Diagnostic Readout Box II

• DS - Detonation Sensor See knock sensor

• DSAV - Deceleration Spark Advance system

• DV - Delay Valve

• DVOM - Digital Volt-Ohmmeter

• DVTRV - Diverter Valv

• DB: Decibels 

• DBC: Dynamic brake control 

• DC: Direct Current 

• DDE: Digital diesel electronics 

• DEFI: Digital Electronic Fuel Injection 

• DFS: Deceleration Fuel Shutoff 

• DIS: Distributorless Ignition System 

• DIS: Direct Ignition System 

• DIS: Diagnosis information system 

• DLC: Data Link Connector

• DME: Digital motor electronics 

• DOHC: Double Overhead Camshaft

• DPF: Diesel Particulate Filter 

• DSC: Dynamic stability control 

• DTC: Diagnostic Trouble Code 

• DVOM: Digital Volt Ohm Meter 

​​

- E -

• ECA - Electronic Control Assembly

• ECC - Electronic Controlled Carburetor

• ECM - Electronic Control Module

• ECS - Evaporation Control System

• ECT - Engine Coolant Temperature sensor

• ECU - Electronic Control Unit

• EDIS - Electronic Distributorless Ignition System

• EDM - Electronic Distributor Modulator

• EEC - Evaporative Emission Controls

• EEC/EEC-I/EEC-II/EEC-III/EEC-IV - Electronic Engine Control systems

• EEGR - Electronic EGR valve

• EFC - Electronic Feedback Carburetor; Electronic Fuel Control

• EFE - Early Fuel Evaporation

• EFE TVS - EFE Thermal Vacuum Switch

• EFI - Electronic Fuel Injection

• EGO - Exhaust Gas Oxygen sensor

• EGR-EPV - EGR External Pressure Valve

• EGR-EVR - EGR Electronic Vacuum Regulator

• EGR-FDLV - EGR Forward Delay Valve

• EGR-RSR - EGR Reservoir

• EGR-S/O - EGR Shut-Off

• EGR-TVS - EGR Thermal Vacuum Switch

• EGRV - EGR Vent solenoid

• EGR-VCV - EGR Vacuum Control Valve

• EGR-VSOL - EGR Vacuum Solenoid

• EGR-VVA - EGR Venturi Vacuum Amplifier

• EHCV - Exhaust Heat Control Valve

• EIS - Electronic Ignition System

• ELB - Electronic Lean Burn

• EMF - Electromotive Force, or Electromagnetic Frequency

• EPA - Environmental Protection Agency

• EPC - Electronic Pressure Control

• EPR-SOL - Exhaust Pressure Regulator Solenoid

• EPR-VLV - Exhaust Pressure Regulator Valve

• ERS - Engine Rpm Sensor

• ESC - Electronic Spark Control system

• ESS - Engine Speed Sensor

• ESSM - Engine Speed Switch Module

• EST - Electronic Spark Timing system

• ETC - Electronic Throttle Control

• EVAP - Evaporative emission control system

• EVCR - Emission Vacuum Control Regulator

• EVP - EGR Valve Position sensor

• EVR - EGR Vacuum Regulator

• E: Economy 

• E2PROM: Electrically Erasable Programmable Read Only Memory 

• EACV: Electronic Air Control Valve 

• EBCM: Electronic Brake Control Module 

• EBM: Electronic Body Module 

• ECA: Electronic Control Assembly 

• ECC: Electronic climate control 

• ECM: Engine Control Module 

• ECT: Engine Coolant Temperature 

• ECU: Electronic Control Unit 

• EDC: Electronic damping control 

• EDIS: Electronic Distributorless Ignition System 

• EDTC: Engine drag torque control 

• EEC: Exhaust emission control 

• EEPROM: Electronically Erasable Programmable Read Only Memory

• E2PROM: Electronically

• Erasable Programmable Read Only Memory 

• EFC: Electronic Fuel Control 

• EFCA: Electronic Fuel Control Assembly 

• EFI: Electronic Fuel Injection 

• EGO: Exhaust Gas Oxygen Sensor 

• EGR: Exhaust Gas Recirculation 

• EGRPS: EGR Valve Position Sensor 

• EGRT: EGR Temperature 

• EH: Electronic-hydraulic 

• EI: Electronic Ignition 

• ELC: Electronic level control 

• EMC: Electro-magnetic compatibility 

• EMI: Electromagnetic Interference 

• EMR: Electronic Module Retard 

• EOS: Exhaust Oxygen Sensor 

• EOBD: European Onboard Diagnostics 

• EPC: Engine power control 

• EPOS: EGR Valve Position Sensor 

• EPROM: Erasable Programmable Read Only Memory (chip) 

• ESA: Engine spark advance 

• ESC: Electronic Spark Control 

• EST: Electronic Spark Timing 

• 00ET: Elapsed time

• EVAP: Evaporative Emission System 

• EVP: EGR Valve Position Sensor  

- F -

• FAP - Forced Air Pre-heat system

• FBC - Feedback Carburetor system

• FBCA - Feedback Carburetor Actuator

• FCS - Feedback Carburetor Solenoid; Feedback Control System; Fuel Control Solenoid; Fuel Control System

• FCV - Fuel Cut-off Valve

• FI - Fuel Injection

• FVEC - Fuel Vapor Emission Control

• FVR - Fuel Vapor Recovery system\

• F: Fahrenheit 

• FBC: Feedback Carburetor System 

• FBCA: Feedback Carburetor Actuator 

• FCS: Fuel Control Solenoid 

• FDC: Fuel Deceleration Valve 

• FI: Fuel Injection

• F.I.R.S.T: Fully integrated road safety 

• FLS: Fluid Level Sensor 

• FM: Frequency modulation 

• Ft.lb.: Foot Pound

• FWD: Front-Wheel Drive 4

• WD: Four-wheel drive  

- G -

• Gal: Gallon 

• GDI: Gasoline Direct Injection 

• GEN: Generator 

• GND: Ground 

• GPM: Grams Per Mile 

• GVW: Gross Vehicle Weight  

- H -

• HAC - High altitude compensator

• HAEC - High Altitude Emission Control system

• HAI - Heated Air Inlet system

• HC - Hydrocarbon

• HCV - Heat control valve

• HEGO - Heated EGO sensor

• HEI - High Energy Ignition

• HSC - High Swirl Combustion chamber

• H2O: Water 

• HC: Hydrocarbon 

• HC: High Compression 

• HD: Heavy duty 

• HDC: Hill descent control 

• HEGO: Heated Exhaust Gas Oxygen Sensor 

• HEI: High Energy Ignition 

• Hg: Mercury 

• HO2S: Heated Oxygen Sensor 

• HP: Horsepower 

• HYD: Hydraulic 

• HT: High Tension  

-I-

• IAC: Idle Air Control 

• IAT: Intake Air Temperature 

• IATS: Intake Air Temperature Sensor 

• IC: Integrated Circuit 

• ICM: Ignition Control Module

• ICS: Idle Control Solenoid 

• ID: Inside Diameter 

• IFI: Indirect Fuel Injection 

• IGN: Ignition 

• I: Injection

• ISC: Idle Speed Control 

• ISO: International Standards Organization 

• ITCS: Ignition Timing Control System 

• ITS: Idle Tracking Switch 

• IAS - Inlet Air Solenoid Valve

• IAT - Intake Air Temperature

• IBP - Integral Back Pressure

• ICM - Ignition Control Module

• IGN - Ignition

• IHP - Indicated Horsepower

• IMVC - Intake Manifold Vacuum Control

• INJ - Injector

• INJ GND - Injector Ground

• ISS - Idle Stop Solenoid

• IVV - Idle Vacuum Valve

 -J-

• JAS - Jet Air Stream

• JCAV - Jet-Controlled Air Valve

• JVS - Jet Valve System

-K-

• KAT: Catalytic converter 

• KHz: Kilohertz 

• KAM - Keep Alive Memory

• KNK - Knock Sensor

• KS - Knock Sensor

• Km: Kilometers 

• KOEC: "Key On, Engine Cranking" 

• KOEO: "Key On, Engine Off" KOER: "

• Key On, Engine Running" 

• KPa: Kilopascal 

• KS: Knock Sensor 

• KV: Kilovolts  

-L-

• L: Liters L: Limousine 

• Lb. ft.: Pound Feet 

• LC: Low compression 

• LCD: Liquid Crystal Display 

• LED: Light Emitting Diode 

• LHD: Left-Hand Drive 

• LSD: Limited slip differential 

• LSR: Land speed record 

• LTFT: Long Term Fuel Trim 

• LWB: Long Wheel-Base  

-M-

• MAF: Mass Air Flow

• MAFS - Mass Air Flow Sensor

• MAJC - Main Air Jet Control

• MAT - Manifold Absolute Temperature Sensor

• MCS - Mixture Control System

• MCT - Manifold Charge Temperature Sensor

• MCU - Microprocessor Control Unit

• MEC - Motronic Engine Control

• MECS - Mazda Equipped Control System

• MEMA - Motor and Equipment Manufacturers Association

• MEWA - Motor and Equipment Wholesalers Association

• MFI - Mechanical Fuel Injection, or Multi-port Fuel Injection

• MHCV - Manifold Heat Control Valve

• MIL - Malfunction Indicator Light

• MPFI - Multi-Point Fuel Injection

• MTA - Managed Thermactor Air

• MVMA - Motor Vehicle Manufacturers Association

• MAP: Manifold Absolute Pressure 

• MAT: Manifold Air Temperature 

• Max: Maximum 

• MBS: Maximum brake support 

• Mch: Mechanical  

• MCS: Mixture Control Solenoid 

• MCT: Manifold Charge Temperature 

• MFI: Multi Port Fuel Injection 

• MIL: Malfunction Indicator Light 

• MIN: Minimum mm: Millimeters 

• MPFI: Multi Point Fuel Injection 

• MPG: Miles Per Gallon 

• MPH: Miles Per Hour 

• MPI: Multi Port Injection 

• MPV: Multi-Purpose Vehicle 

• MS: Millisecond 

• MT: Manual Transmission 

• MV: Millivolts  

-N-

• NEG: Negative 

• Nm: Newton Meters 

• NADA - National Automobile Dealers Association

• NAPA - National Automotive Parts Association

• NOX: Oxides of Nitrogen 

• NVRAM: Nonvolatile Random Access Memory 

-O-

• O2: Oxygen 

• O2S: Oxygen Sensor 

• OC - Oxidation Catalyst

• OHV - Overhead Valve

• OS - Oxygen sensor

• OSAC - Orifice Spark Advance Control

• OSHA - Occupational Safety and Health Administration

• OTVS - Oil Thermal Vacuum Switch

• OXS - Oxygen Sensor system

• OBD: Onboard Diagnostics 

• OBD I: Onboard Diagnostics One 

• OBD II: Onboard Diagnostics Two 

• OD: Outside Diameter 

• OD: Over Drive 

• OC - Oxidation Catalyst

• OHV - Overhead Valve

• OS - Oxygen sensor

• OSAC - Orifice Spark Advance Control

• OSHA - Occupational Safety and Health Administration

• OTVS - Oil Thermal Vacuum Switch

• OXS - Oxygen Sensor system

• OE: Original Equipment 

• OEM: Original Equipment Manufacturer 

• OHC: Overhead Camshaft 

• OHV: Overhead Valve 

• ORV: Off road vehicle 

• OS: Oxygen Sensor  

-P-

• PA: Pressure Air 

• PA - Pulse Air

• PACV - Pulse Air Check Valve

• PAF - Pulse Air Feeder

• PAI - Pulse Air Injection

• PAS - Pulse Air System

• PCOV - Purge Control Valve

• PCV - Positive Crankcase Ventilation system

• PCVS - PCV Solenoid

• PCVV - Positive Crankcase Ventilation Valve

• PECV - Power Enrichment Control Valve

• PFE - Pressure Feedback EGR sensor

• PFI - Port Fuel Injection

• PIP - Profile Ignition Pickup

• PROM - Programmable Read-Only Memory

• PSOV - Canister Purge Shut-Off Valve

• PSPS - Power Steering Pressure Switch

• PSV - Pulse Air Shut-off Valve

• PTC - Positive Temperature Coefficient choke heater

• PVA - Ported Vacuum Advance

• PVCS - Ported Vacuum Control System

• PVFFC - Pressure/Vacuum Fuel Filler Cap

• PVS - Ported Vacuum Switch

• PAIR: Pulsed Secondary Air Injection 

• PAS: Power-Assisted Steering 

• PB: Power brakes 

• P/B: Power Bakes 

• PCM: Powertrain Control Module 

• PCV: Positive Crankcase Ventilation 

• PDC: Park distance control 

• PECV: Power Enrichment Control Valve 

• PFI: Port Fuel Injection 

• PID: Parameter ID 

• PIP: Profile ignition pickup 

• PL: Power locks 

• P/N = Part Number 

• PNP: Park/Neutral Switch 

• POS: Positive 

• PPM: Parts Per Million 

• PROM: Program Read Only Memory (chip) 

• PS: Power Steering 

• PS: Power seats 

• PSI: Pounds Per Square Inch 

• PSP: Power Steering Pressure 

• PTC: Pending Trouble Code 

• PTC: Positive temperature coefficient  

• PW: Power window 

• PWR: Power to Weight Ratio 

-Q-

• Qt.: Quart  

-R-

• RAM: Random Access Memory

• RC - Rear Catalytic Converter

• RDV - Retard Delay Valve or Reverse Delay Valve

• RMA - The Rubber Manufacturers Association

• ROM - Read Only Memory

• RFI: Radio Frequency Interference 

• RHD: Right-Hand Drive 

• ROM: Read Only Memory 

• RON: Rated Octane Number 

• RPM: Revolutions Per Minute 

• RUF: Adaptable to catalytic converter 

• RWD: Rear-Wheel Drive  

-S-

• SAE: Society of Automotive Engineering 

• SC: Single Carburetor  

• SAE - Society of Automotive Engineers

• SAS - Secondary Air Supply system See “Air Injection System.”

• SBC - Single Bed Catalytic converter; Small Block Chevy

• SCC - Spark Control Computer

• SCS - Spark Control System, or Speed Controlled Spark

• SCVAC - Speed Control Vacuum Control

• SDV - Spark Delay Valve

• SEC ACT - Secondary Actuator

• SEFI - Sequential Electronic Fuel Injection

• SFI - Sequential Fuel Injection

• SHED - Sealed Housing Evaporative Determination system

• SIL - Shift Indicator Light

• SIS - Solenoid Idle Stop

• SOL V - EGR Solenoid Vacuum Valve Assembly

• SPFI - Single-Point Fuel Injection

• SPDT - Single-Pole, Double-Throw Switch

• SPST - Single-Pole, Single-Throw Switch

• SRS - Supplemental Restraint System (airbag)

• SSI - Solid State Ignition system

• SVCBV - Solenoid Valve Carburetor Bowl Vent

• SVV - Solenoid Vent Valve

• SC: Supercharged 

• SEFI: Sequential Electronic Fuel Injection 

• SES: Service Engine Soon (light) 

• SFI: Sequential Fuel Injection 

• SIPS: Side Impact Protection System 

• SLS: Self leveling suspension 

• SOHC: Single over head camshaft 

• SR: Sunroof 

• SRS: Secondary Restraint System 

• SRS: Supplemental Restraint System (air bag) 

• SRT: System Readiness Test 

• SS: Speed Sensor 

• SSI: Solid State Ignition 

• STFT: Short Term Fuel Trim 

• SWB: Short Wheel-Base  

-T-

• TACH: Tachometer 

• TAC - Thermostatically Controlled Air Cleaner

• TAD - Thermactor Air Diverter Solenoid

• TAV - Temperature Activated Vacuum System

• TBI - Throttle Body Injection

• TPMS - Tire Pressure Monitor System

• TC - Throttle Closer

• TCAC - Thermostatic Controlled Air Cleaner System

• TCC - Transaxle Converter Clutch system

• TCS - Throttle Control System; Transmission Converter Switch; Transmission Controlled Spark

• TDC - Top Dead Center

• TDP - Throttle closing Dashpot

• TDS - Time Delay Solenoid

• TEC - Thermactor Exhaust Control system

• TES - Thermal Electric Switch

• TFI, TFI-IV - Thick Film Integrated Ignition (Ford systems)

• TIC - Thermal Ignition Control

• TIV - Thermactor Idle Vacuum valve

• TK - Throttle Kicker

• TKA - Throttle Kicker Actuator

• TKS - Throttle Kicker Solenoid

• TO - Thermal Override

• TOC - Throttle Opener Control system

• TP - Throttle Position; Throttle Position Sensor

• TPI - Tuned Port Injection

• TPS - Throttle Position Sensor

• TR - Thermal Reactor

• TSD - Throttle Solenoid

• TSP - Throttle Solenoid Positioner

• TVS - Temperature Vacuum Switch; Thermal Vacuum Switch

• TVSV - Thermostatic Vacuum Switch Valve

• TVV - Thermal Vacuum Valve; Thermal Vent Valve

• TWC - Three-Way Catalyst

• TB: Throttle Body 

• TBI: Throttle Body Injection 

• TC: Turbocharged 

• TC: Twin Carburetor 

• TCC: Torque Converter Clutch 

• TCM: Transmission or Transaxle Control Module 

• TCS: Traction control solenoid  

• TD: Turbo Diesel 

• TDC: Top Dead Center 

• TDI: Turbo Direct Injection (A turbo charged direct injected diesel engine) 

• TIV: Thermactor Idle Vacuum Valve 

• TKS: Throttle Kicker Solenoid 

• TPI: Tuned Port Injection 

• TPP: Throttle Position Potentiometer 

• TPS: Throttle Position Sensor 

• TPT: Throttle Position Transducer 

• TS: Twin spark 

• TSP: Throttle Solenoid Positioner 

• TUR: Turbo 

• TV: Throttle Valve 

• TVS: Thermal Vacuum Switch 

• TWC: Three Way Catalyst 

• TWC+OC: Three Way + Oxidation Catalytic Converter  

-U-​

•  UC - Underbody Catalyst

-V-

• V: Volts 

• VAC - Vacuum Advance Control

• VAF - Vane Air Flow meter

• VAT - Vane Air Temperature sensor

• VAV - Vacuum Advance Valve

• VB - Vacuum Break

• VBV - Vacuum Bias Valve

• VCKV - Vacuum Check Valve

• VCS - Vapor Control System; Vacuum Control Switch

• VCV - Vacuum Control Valve

• VDV - Vacuum Delay Valve; Vacuum Differential Valve

• VECI - Vehicle Emission Control Information Decal

• VHC - Vacuum Operated Exhaust Heat Control Valve

• VIN - Vehicle Identification Number

• VMV - Vacuum Modulator Valve

• VOC - Volatile Organic Compounds

• VOM - Volt-Ohmmeter

• VOTM - Vacuum-Operated Throttle Modulator

• VP - Vacuum Pump

• VRDV - Vacuum Retard Delay Valve

• VRESER - Vacuum Reservoir

• VREST - Vacuum Restrictor

• VR - Variable Reluctance Sensor

• VR/S - Vacuum Regulator Solenoid

• VRS - Variable Reluctance Sensor

• V-RSR - Vacuum Reservoir

• V-RST - Vacuum restrictor

• VRDV - Vacuum Retard Delay Valve

• VRES - Vacuum Reservoir

• VREST - Vacuum Restrictor

• VRV - Vacuum Reducer Valve; Vacuum Regulator Valve

• VS - Vacuum Switch

• VSA - Vacuum Switch Assembly

• VSC - Vehicle Speed Control Sensor

• VSS - Vehicle Speed Sensor; Vacuum Switch Solenoid

• VSV - Vacuum Solenoid Valve; Vacuum Switching Valve

• VTM - Vacuum Throttle Modulator

• VTP - Vacuum Throttle Positioner

• VTV - Vacuum Transmitting Valve

• VVA - Venturi Vacuum Amplifier

• VVC - Variable Voltage Choke

• VVT - Variable Valve Timing

• VVV - Vacuum Vent Valve

• - W -

• WAC - Wide-Open Throttle Air Conditioner Cutoff

• WOT - Wide-Open Throttle

• WOTS - Wide-Open Throttle Switch

• WOTV - Wide Open Throttle Valve

• VAC: Vacuum 

• VAC: Volts Alternating Current 

• VAF: Volume Airflow 

• VAF: Vane Airflow Sensor 

• VCC: Viscous Converter Clutch 

• VCM: Vehicle Control Module 

• VDC: Volts Direct Current 

• VIN: Vehicle Identification Number 

• VR: Voltage Regulator VS: Vehicle Sensor 

• VSS: Vehicle Speed Sensor 

• VVC: Variable Valve Control 

• VVT: Variable Valve Timing   

-Z-

•  ZEV: Zero Emissions Vehicle​​