Emission Glossary and Acronyms

Abbreviations & Acronyms

Emission Glossary and Acronyms

• AAC: Auxiliary Air Control
• AAT: Ambient Air Temperature
• AAV: Anti Afterburn Valve
• ABS: Anti-Lock Brake System
• A/C: Air Conditioning
• ACC: Accessory Position
• ACERT: Advanced Combustion Emissions Reduction Technology
• ACL: Air Cleaner (Thermostatic Type)
• ACM: Air Bag Control Module
• ACR-4: Air Conditioning Refrigerant, Recovery, Recycling, Recharging
• ACT: Air Charge Temperature
• A/D: Analog To Digital
• AECM: Air Bag Electronic Control Module
• A/F: Air/Fuel Ratio
• AFR: Air Filter Restriction
• AFS: Air-Fuel Ratio Sensor
• AIR: Secondary Air Injection
• AIRB: Secondary Air Injection Bypass
• AIRD: Secondary Air Injection Diverter
• AIS: Secondary Air Injection
• ALDL: Assembly Line Diagnostic Link
• AM1: Thermactor Air Management 1 (TAB)
• AM2: Thermactor Air Management 2 (TAB Or TAD)
• AP: Accelerator Pedal
• API: American Petroleum Institute
• APP: Accelerator Pedal Position
• APS: Accelerator Position Sensor
• ARS: Automatic Restraint System
• ASD: Automatic Shutdown
• ASDM: Air Bag System Diagnostic Module
• ASET: Application Specific Engine Technology
• ASR: Automatic Slip Regulation
• A/T: Automatic Transaxle Or Transmission
• ATC: Active Transfer Case
• ATDC: After Top Dead Center
• BAP: Barometric Atmosphere Pressure
• BAR: Bureau Of Auto Repair
• BARO: Barometric Pressure
• BBL: Barrel
• BCM: Body Control Module
• BID: Breakerless Inductive Discharge
• BOB: Breakout Box
• BOO: Brake On/Off
• BP: Barometric Pressure
• BPA: Bypass Air
• BPT: Backpressure Transducer
• BTDC: Before Top Dead Center
• BVT: Backpressure Variable Transducer
• B+: Battery Positive Voltage
• C: Continuous Memory
• CA: California
• CAB: Controller Anti-Lock Brake
• CAC: Charge Air Cooler
• CANP: Canister Purge
• CARB: California Air Resources Board
• CARB: Carburetor
• CAT: Catalytic Converter
• CBD: Closed Bowl Distributor
• CCA: Center Control Assembly
• CCC: Converter Clutch Control Solenoid
• CCCI: Computer Controlled Coil Ignition
• CCD: Chrysler Collision Detection
• CCD: Computer Controlled Dwell
• CCECS: Computer Controlled Emission Control System
• CCO: Converter Clutch Overdrive Solenoid
• CCOT: Cycling Clutch Orifice Tube
• CCP: Carbon Canister Purge
• CCRM: Constant Control Relay Module
• CCV: Closed Crankcase Ventilation
• CDI: Common Rail Direct Injection
• CDR: Crankcase Depression Regulator
• CEC: Computerized Emission Control System
• CES: Clutch Engage Switch
• CFRM: Condenser Fan Relay Module
• CGI: Clean Gas Induction
• CID: Cubic Inch Displacement
• CIS: Constant Injection System
• CIS-E: Constant Injection System Electronic
• CKP: Crankshaft Position Sensor
• CLECS: Closed Loop Emission Control System
• CLFCS: Closed Loop Fuel Control System
• CMFI: Central Multi-Port Fuel Injection
• CMP: Camshaft Position Sensor
• CMTC: Compass/Mini-Trip Computer
• CNG: Compressed Natural Gas
• CO: Carbon Monoxide
• COP: Coil On Plug
• CO2: Carbon Dioxide
• CP: Canister Purge
• CP: Crankshaft Position
• CPP: Clutch Pedal Position
• CPU: Central Processing Unit
• CRFS: Common Rail Fuel System
• CSF: Crankshaft Speed Fluctuation
• CSFI: Central Sequential Fuel Injection
• CTM: Central Timer Module
• CTOX: Continuous Trap Oxidizer
• CTP: Closed Throttle Position
• CVVT: Continuous Variable Valve Timing
• CYP: Cylinder Position
• C3: Computer Command Control
• C-4: Computer Controlled Catalytic Converter
• DAB: Driver Air Bag
• DCL: Data Communications Link
• DDE: Digital Diesel Electronics
• DDEC: Detroit Diesel Engine Control
• DDI:Direct Diesel Injection
• DEEC: Diesel Engine Control
• DDS: Driveline Disengagement Switch
• DEC: Diesel Electronic Engine Control System
• DERM: Diagnostic Energy Reserve Module
• DFI: Digital Fuel Injection
• DFI: Direct Fuel Injection
• DI: Distributor Ignition
• DI:Direct Injection
• DIC: Driver Information Center
• DIS: Direct Ignition System
• DIS: Distributorless Ignition System
• DLC: Data Link Connector
• DME: Digital Motor Electronics
• DMIVA: Distributor Mounted Ignition Vacuum Advance
• DOC: Diesel Oxidation Catalytic Converter
• DOHC: Dual Overhead Camshaft
• DPF: Diesel Particulate Filter
• DPFE: Differential Pressure Feedback EGR
• DPI: Dual Plug Ignition
• DPR: Diesel Particle Reduction System
• DRB: Diagnostic Readout Box
• DRB II: Diagnostic Readout Box II
• DRB III: Diagnostic Readout Box III
• DRL: Daytime Running Lamps
• DS-I: Dura Spark I Ignition System
• DS-II: Dura Spark II Ignition System
• DSAS: Deceleration Spark Advance System
• DSS: Downshift Solenoid
• DTC: Diagnostic Trouble Code
• DTM: Diagnostic Test Mode
• DVOM: Digital Volt Ohm Meter
• EAIR: Electronic Secondary Air Injection
• EAT: Electronically Controlled Automatic Transaxle Or Transmission
• EBCM: Electronic Brake Control Module
• EBL: Electric Back Lite (Rear Window Defroster)
• EBP: Exhaust Back Pressure
• ECA: Electronic Control Assembly
• ECCS: Electronic Concentrated Engine Control System
• ECITS: Electronic Control Ignition Timing System
• ECCS: Electronic Concentrated Engine Control System
• ECL: Engine Coolant Level
• ECM: Engine Control Module
• ECT: Engine Coolant Temperature
• ECTF: Cooling Fan Engine Coolant Temperature
• ECU: Engine Control Unit
• ECUI: Electronically Controlled Unit Injection
• EDC: Electronic Diesel Control
• EDF: Electro Drive Fan
• EDFI: Electronic Diesel Fuel Injection
• EDI: Electronic Controlled Direct Ignition System
• EDIS: Electronic Distributorless Ignition System
• EDL: Engine Data Line
• EEC-I: Electronic Engine Control I
• EEC-II: Electronic Engine Control II
• EEC-III: Electronic Engine Control III
• EEC-IV: Electronic Engine Control IV
• EEC-V: Electronic Engine Control V
• EEGR: Electronic EGR Valve
• EEPROM: Electronically Erasable Programmable Read Only Memory
• EET: Electronic EGR Transducer
• EFC: Electronic Feedback Carburetor
• EFE: Early Fuel Evaporation
• EFI: Electronic Fuel Injection
• EGO: Exhaust Gas Oxygen Sensor
• EGR: Exhaust Gas Recirculation
• EGRC: EGR Control
• EGRT: EGR Temperature
• EGRV: EGR Vent
• EI: Electronic Ignition
• EIC: Electronic Instrument Cluster
• EICU: Electronic Ignition Control Unit
• EITC: Electronic Ignition Timing Control
• ELB: Electronic Lean Burn System
• ELC: Electronic Level Control
• ELCD: Evaporative Loss Control Device
• ELD: Electric Load Detector
• EMR: Electronic Module Retard
• EOP: Engine Oil Pressure
• EOT: Engine Oil Temperature
• EPA: Environmental Protection Agency
• EPC: Electronic Pressure Control
• EPR: Exhaust Back Pressure Regulator
• EPROM: Erasable Programmable Read Only Memory
• EPT: EGR Pressure Transducer
• ESA: Electronic Spark Advance
• ESC: Electronic Spark Control
• ESS: Engine Speed Sensor
• EST: Electronic Spark Timing
• ETC: Electronic Temperature Control
• ETC: Electronic Throttle Control
• ETCS-i: Electronic Throttle Control System-intelligent
• ETW: Equivalent Test Weight
• EVAP: Evaporative Emission Control System
• EVIC: Electronic Vehicle Information Center
• EVO: Electronic Variable Orifice
• EVP: EGR Valve Position
• EVR: EGR Vacuum Regulator
• EVRT: Electronically Controlled Turbocharger
• EVSV: Electronic Vacuum Switching Valve
• EWL: Engine Warning Lamp
• EZL: Electronic Ignition System With Variable Characteristics
• FBC: Feedback Carburetor
• FDCS: Fuel Demand Command Signal
• FED: Federal
• FEEPROM: Flash Electrically Erasable Programmable Read Only Memory
• FEPROM: Flash Electrically Programmable Read Only Memory
• FF: Flexible Fuel
• FI: Fuel Injection
• FMEM: Failure Mode Effects Management
• FMI: Failure Mode Identifiers
• FPCM: Fuel Injection Pump Control Module
• FPM: Fuel Pump Monitor
• FPRC: Fuel Pressure Regulator Control
• FR: Fillpipe Restrictor
• FSS: Flexible Service System
• GFD: Generic Field Data
• GFP: Gaseous Fuel Prep
• GPC: Glow Plug Control
• GPL: Glow Plug Wait Lamp
• GPM: Gallons Per Minute
• gpm: Grams Per Million
• GPR: Glow Plug Relay
• GVW: Gross Vehicle Weight
• GVWR: Gross Vehicle Weight Rating
• HC: Hydrocarbons
• HCU: Hydraulic Control Unit
• HD: Heavy Duty
• HDC: Heavy Duty Emission Cycle
• HE: Hall Effect
• HEDF: High Electro Drive Fan
• HEGO: Heated Exhaust Gas Oxygen Sensor
• HEGR: High Efficiency Exhaust Gas Recirculation
• HEI: High Energy Ignition System
• HEUI: Hydraulically Actuated Electronically Controlled Unit Injectors
• HFAN: High Speed Cooling Fan
• HFC: High Fan Control
• HFM: Hot Film Air Mass Sensor
• HO: High Output
• HO2S: Heated Oxygen Sensor
• HPCR: High Pressure Common Rail
• HSC: High Swirl Combustion
• HSIA: High Speed Inlet Air Control
• HVAC: Heater Vent Air Conditioning
• HVS: High Voltage Switch Ignition System
• IAC: Idle Air Control
• IACV-AAC: Idle Air Control Valve-Auxiliary Air Control Valve
• IAT: Intake Air Temperature
• IC: Ignition Control
• ICM: Ignition Control Module
• ICP: Injector Control Pressure
• ICS: Ignition Control System
• ICTO: Ignition Coolant Temperature Override
• IDI: Indirect Diesel Injection
• IDI: Indirect Fuel Injection
• IDM: Ignition Diagnostic Monitor
• IDM: Injector Driver Module
• ILEV: Inherently Low Emissions Vehicle
• IMRC: Intake Manifold Runner Control
• IMT: Intake Manifold Temperature
• IOD: Ignition Current Off Draw
• IPR: Injection Control Pressure Regulator
• ISC: Idle Speed Control
• ITS: Idle Tracking Switch
• IVS: Idle Validation Switch
• JTEC: Jeep Truck Powertrain Control Module System
• KAM: Keep Alive Memory
• KOEO: Key On Engine Off
• KOER: Key On Engine Running
• KS: Knock Sensor
• LCD: Liquid Crystal Display
• LDP: Leak Detection Pump
• LED: Light Emitting Diode
• LEV: Low Emissions Vehicle
• LFAN: Low Speed Cooling Fan
• LH: Lefthand
• LNC: Lean NOx Catalyst
• LPG: Liquid Propane Gas
• LPT: Light Pressure Turbo
• LUS: Lock-Up Solenoid
• LVW: Loaded Vehicle Weight
• M/CCC: Modulated Converter Clutch Control
• MAF: Mass Air Flow
• MAP: Manifold Absolute Pressure
• MAT:Manifold Air TemperatureMAT:MultiAir Technology
• MC-VAF: Measuring Core Volume Air Flow
• MCC: Manifold Catalytic Converter
• MCCA: Message Center Control Assembly
• MCS: Mixture Control System
• MCU: Microprocessor Control Unit
• MDFI: Mechanical Diesel Fuel Injection
• MDP: Manifold Differential Pressure
• MEMCAL: Memory Calibration Unit
• MFI: Multi-Port Fuel Injection
• MIC: Mechanical Instrument Cluster
• MID: Message Identifier
• MIL: Malfunction Indicator Lamp
• MLUS: Modulator Lock-Up Solenoid
• MPI: Multi-Port Injection
• MLP: Manual Lever Position
• MST: Manifold Surface Temperature
• M/T: Manual Transaxle Or Transmission
• MTA: Managed Thermactor Air
• MUI: Mechanical Unit Injection
• MUT II: Multi-Use Tool, Second Edition
• NAC: Nitrogen Oxides (NOx) Absorbing Catalyst
• NGS: New Generation Star Tester
• NGV: Natural Gas Vehicle
• NOS: NOx Sensor
• NOx: Oxides Of Nitrogen
• NSC: NOx Storage Catalyst
• NVRAM: Non Volatile Random Access Memory
• OBD: On-Board Diagnosis
• OBD II: On-Board Diagnosis II
• OC: Oxidation Catalytic Converter
• OCC: Output Circuit Check
• ODM: Output Driver Module
• ODO: Odometer
• OHC: Overhead Cam
• ORVR: On Board Refueling Vapor Recovery
• OSAC: Orifice Spark Advance Control
• OSC: Output State Control
• OSS: Output Shaft
• OSS: Output Speed Sensor
• OTIS: Overhead Travel Information System
• OWL: Oil/Water Warning Lamp
• O2S: Oxygen Sensor
• PAB: Passenger Air Bag
• PAD: Passenger Air Bag Disable
• PAG: Polyalkaline Glycol
• PAIR: Pulsed Secondary Air Injection
• PCI: Programmable Communication Interface
• PCM: Powertrain Control Module
• PCV: Positive Crankcase Ventilation
• PDC: Power Distribution Center
• PFE: Pressure Feedback EGR
• PG: Pulse Generator
• PGM-CARB: Programmed Carburetor
• PGM-FI: Programmed Fuel Injection Control System
• PGM-IG: Programmed Ignition
• PID: Parameter Identifier
• PIP: Profile Ignition Pickup
• PNP: Park/Neutral Position
• ppm: Parts Per Million
• PRC: Pressure Regulator Control
• PROM: Programmable Read Only Memory
• PSI: Pounds Per Square Inch
• PSP: Power Steering Pressure
• PSPS: Power Steering Pressure Switch
• PTEC: Powertrain Electronic Controller Management System
• PTO: Power Take Off
• PTOX: Periodic Trap Oxidizer
• PWM: Pulse Width Modulated
• R: Key On Engine Running
• RABS: Rear Anti-Lock Braking System
• RAM: Random Access Memory
• RAP: Retained Accessory Power
• RDS: Radio Data System
• REDOX: Reduction Oxidation Catalytic Converter
• REGT: Recirculated Exhaust Gas Temperature
• RFI: Radio Frequency Interference
• RH: Righthand
• RKE: Remote Keyless Entry
• ROM: Read Only Memory
• RON: Research Octane Number
• RPM: Revolutions Per Minute
• RPS: Revolutions Per Second
• SAW: Spark Angle Word
• SBEC: Single Board Engine Control
• SC: Supercharger
• SCC: Spark Control Computer
• SCCS: Speed Control Command Switches
• SCPI: Sequential Central Port Fuel Injection
• SCR: Selective Catalytic Reduction
• SCS: Speed Controlled Spark
• SFI: Sequential Multi-Port Fuel Injection
• SFTP: Supplementary Federal Test Procedure
• SHO: Super High Output
• SID: Subsystem Identifier
• SIL: Shift Indicator Lamp
• SKIM: Smart Key Immobilizer Module
• SMEC: Single Module Engine Control
• SOHC: Single Overhead Camshaft
• SO2: Sulfur Dioxide
• SPCS: Spark Plug Switching Control System
• SPI: Serial Peripheral Interface
• SPK: Spark Control
• SPL: Smoke Puff Limiter
• SPOUT: Spark Output
• SRI: Service Reminder Indicator
• SRS: Supplemental Restraint System
• SS: Shift Solenoid
• SSI: Solid State Ignition
• SST: Special Service Tool
• STAR: Self-Test Automatic Readout
• STC: Spark Timing Control
• STI: Self-Test Input
• STO: Self-Test Output
• SULEV: Super Ultra Low Emissions Vehicle
• SVO: Special Vehicle Operations
• SVT: Special Vehicle Team
• TAB: Thermactor Air Bypass Vacuum Solenoid Valve
• TAC: Tachometer Output Signal
• TAD: Thermactor Air Diverter Vacuum Solenoid Valve
• TBI: Throttle Body Fuel Injection
• TC: Turbocharger
• TCC: Torque Converter Clutch
• TCS: Transmission Controlled Spark
• TDC: Top Dead Center
• TFI-I: Thick Film I Ignition System
• TFI-IV: Thick Film IV Ignition System
• TFT: Transmission Fluid Temperature
• TI Transistor Ignition System
• TLEV: Transitional Low Emission Vehicle
• TOT: Transmission Oil Temperature
• TP: Throttle Position
• TP: Throttle Positioner
• TPI: Tuned Port Injection
• TPOUT: Throttle Position Output
• TPS: Throttle Position Sensor
• TRS: Transmission regulated Spark
• TSB: Technical Service Bulletin
• TSS: Transmission Speed Sensor
• TSS: Turbine Speed Sensor
• TTS: Transaxle Temperature Switch
• TV: Throttle Valve
• TVP: Throttle Valve Potentiometer
• TVV: Thermal Vacuum Valve
• TWC: Three-Way Catalytic Converter
• TWC+OC: Three-Way + Oxidation Catalytic Converter
• UCC: Underbody Catalytic Converter
• UIC: Universal Integrated Circuit Ignition
• ULEV: Ultra Low Emissions Vehicle
• UVC: Under Valve Cover
• VAF: Vane Air Flow
• VANOS: Double Variable Camshaft Control
• VAT: Vane Air Temperature
• VCM: Vehicle Control Module
• VCRM: Variable Control Relay Module
• VDV: Vacuum Delay Valve
• VEPS: Vehicle Electronic Programming System
• VFD: Vacuum Fluorescent Display
• VGT: Variable Geometry Turbocharger
• VIC: Vehicle Information Center
• VICS: Variable Inertia Charging System
• VIN: Vehicle Identification Number
• VIT: Vehicle Interface Tool
• VNT: Variable Nozzle Turbocharger
• VPM: Vehicle Personality Module
• VP-20: Bosch VP-20 Diesel Engine Control System
• VRE: Vehicle Retarder Enable
• VREF: Reference Voltage
• VRV: Vacuum Regulator Valve
• VSS: Vehicle Speed Sensor
• VTEC: Variable Valve Timing & Valve Lift Electronic Control
• VTSS: Vehicle Theft Security System
• VVT: Variable Valve Timing
• VVTi: Variable Valve Timing With Intelligence
• VVTL-i: Variable Valve Timing & Lift Intelligence
• WAC: Wide Open Throttle A/C Cutoff
• WCC: Warm-Up Catalytic Converter
• WOT: Wide Open Throttle
• WOTPS: Wide Open Throttle Position Switch
• WSS: Wheel Speed Sensor
• WU-OC: Warm-Up Oxidation Catalytic Converter
• WU-TWC: Warm-Up Three-Way Catalytic Converter
• X: Equipped
• ZEV: Zero Emissions Vehicle
• 1 BBL: 1 Barrel Carburetor
• 2 BBL: 2 Barrel Carburetor
• 3 BBL: 3 Barrel Carburetor
• 4 BBL: 4 Barrel Carburetor
• 2 VH: 2 Valve Head
• 4 VH: 4 Valve Head
• – : Not Equipped

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