OFFICE Open 8am-5pm, Mon - Fri. 


After hrs Message  Phone 605-939-4402

Thomas Auto Logo

Acronyms & Abbreviations

AAR: Automatic air recirculation
ABS: Antilock Braking System
ABSV: Air Bypass Solenoid Valve
AC: Alternating Current
A/C: Air Conditioning
ACV: Actual cashed value
ACTS: Air Charge Temperature Sensor
ADC: Automatic damping control
AEV: Automatic enrichment vehicle
AEI: Integrated electronic injection
A/F: Air/Fuel Ratio
AFC: Air Flow Control
AFM: Air Flow Meter
AFS: Air Flow Sensor
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
AT: Automatic transmission
A/T: Automatic Transmission
ATC: Adaptive transmission control
ATDC: After Top Dead Center
ATF: Automatic Transmission Fluid
ATS: Air Temperature Sensor
AW: Alloy wheels
AWD: All Wheel Drive

B+: Battery Positive Voltage
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: Celsius
C3I: Computer Controlled Coil Ignition
CAB: Cabriolet / Convertible
CAD: Computer aided design
CALPAK: Calibration Pack
CAN: Controller Area Network
CANP: 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

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: 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
ET: Elapsed time
EVAP: Evaporative Emission System
EVP: EGR Valve Position Sensor


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 Foot Pound
FWD: Front-Wheel Drive
4WD: Four-wheel drive

Gal: Gallon
GDI: Gasoline Direct Injection
GEN: Generator
GND: Ground
GPM: Grams Per Mile
GVW: Gross Vehicle Weight

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

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

JAS: Jet Air System

KAT: Catalytic converter
KHz: Kilohertz
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: 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

MAF: Mass Air Flow
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

NEG: Negative
Nm: Newton Meters
NOX: Oxides of Nitrogen
NVRAM: Nonvolatile Random Access Memory

O2: Oxygen
O2S: Oxygen Sensor
OBD: Onboard Diagnostics
OBD I: Onboard Diagnostics One
OBD II: Onboard Diagnostics Two
OD: Outside Diameter
OD: Over Drive
OE: Original Equipment
OEM: Original Equipment Manufacturer
OHC: Overhead Camshaft
OHV: Overhead Valve
ORV: Off road vehicle
OS: Oxygen Sensor

PA: Pressure Air
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


Qt.: Quart

RAM: Random Access 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


SAE: Society of Automotive Engineering
SC: Single Carburetor 
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


TACH: Tachometer
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

V: Volts
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

WOT: Wide-Open Throttle

ZEV: Zero Emission vehicleA