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Common Automotive Abbreviations

A Amperes
  A/C Air Conditioning
  A/T Automatic Transmission/Transaxle
  AAP Auxiliary Accelerator Pump
  AB Air Bleed
  ABCV Air Bleed Control Valve
  ABDC After Bottom Dead Center
  ABRS Air Bag Restraint System
  ABS Anti-Lock Brake System
  AC Alternating Current
  ACC A/C Clutch Compressor
  ACCS A/C Cycling Switch
  ACCUM Accumulator
  ACCY Accessory
  ACT Air Charge Temperature Sensor
  ACV Thermactor Air Control Valve
  ADJ Adjust or Adjustable
  ADV Advance
  AFS Airflow Sensor
  AI Air Injection
  AIR or A.I.R. Air Injection Reactor
  AIS Air Injection System
  ALCL Assembly Line Communications Link
  ALDL Assembly Line Diagnostic Link
  ARC Automatic Ride Control
  ASCD Automatic Speed Control Device
  ASCS Air Suction Control Solenoid
  ASD Auto Shutdown
  ASDM Air Bag System Diagnostic Module
  ASV Air Suction Valve
  ATC Automatic Temperature Control
  ATDC After Top Dead Center
  ATF Automatic Transmission Fluid
  ATS Air Temperature Sensor
  AXOD Automatic Transaxle Overdrive
  Abs. Absolute
  Accy. Accessory
  Alt. Alternator or Altitude
  Amp. Ampere
  Assy. Assembly
  Auto. Automatic
  Aux. Auxiliary
  Avg. Average
B/P Backpressure
  BAC By-Pass Air Control
  BAP Barometric Absolute Pressure Sensor
  BARO Barometric
  BBDC Before Bottom Dead Center
  BCM Body Control Module
  BDC Bottom Dead Center
  BHP Brake Horsepower
  BLK Black
  BLU Blue
  BMAP Barometric & Manifold Absolute Pressure Sensor
  BOO Brake On-Off Switch
  BP Barometric Pressure sensor
  BPS Barometric Pressure Sensor
  BPT Backpressure Transducer
  BRN Brown
  BTDC Before Top Dead Center
  BTU British Thermal Unit
  BVSV Bimetallic Vacuum Switching Valve
  Baro. Barometric
  Batt. Battery
  Bbl. Barrel (Example: 4-Bbl.)
  Blst. Ballast
  Blwr. Blower
  Brkr. Breaker
C Celsius (Degrees)
  C(3) I Computer Controlled Coil Ignition
  C(4) Computer Controlled Catalytic Converter
  CANP Canister Purge solenoid
  CARB California Air Resources Board
  CAT Catalytic Converter
  CB Circuit Breaker
  CBD Closed Bowl Distributor
  CBVV Carburetor Bowl Vent Valve
  cc Cubic Centimeter
  CCC Computer Command Control
  CCD Computer Controlled Dwell
  CCM Central Control Module
  CCO Converter Clutch Override
  CCOT Cycling Clutch Orifice Tube
  CCW Counterclockwise
  CDI Capacitor Discharge Ignition
  CEC Computerized Engine Control
  CFI Central Fuel Injection
  CID Cubic Inch Displacement
  CID Cylinder Identification sensor
  CIS Continuous Injection System
  CIS-E Continuous Injection System-Electronic
  CKT Circuit
  CLR Clear
  CNG Compressed Natural Gas
  CO Carbon Monoxide
  CO2 Carbon Dioxide
  CONV Convertible
  CP Canister Purge
  CPA Connector Position Assurance
  CPS Crank Position Sensor
  CTS Coolant Temperature Sensor
  CV Check Valve or Constant Velocity
  CVC Constant Vacuum Control
  CW Clockwise
  CYL or Cyl. Cylinder
  Calif. California
  Carb. Carburetor
  Chrg. Charging
  Circ. Circuit
  Cntrl. Control
  Comp. Compressor or Compartment
  Conn. Connector
  Cont. Continued
  Conv. Convertible or Converter
  Cu. In. Cubic Inch
  Cyl. Cylinder
D Drive
  DBC Dual Bed Catalyst
  DC Direct Current or Discharge
  DDD Dual Diaphragm Distributor
  DERM Diagnostic Energy Reserve Module
  DFI Digital Fuel Injection
  DIC Driver Information Center
  DIS Direct Ignition System
  DIS Distributorless Ignition System
  DIST Distribution
  DISTR Distributor
  DK BLU Dark Blue
  DK GRN Dark Green
  DME Digital Motor Electronics (Motronic System)
  DOHC Double Overhead Cam
  DOT Department of Transportation
  DP Dashpot
  DRB-II Diagnostic Readout Box
  DVOM Digital Volt/Ohm Meter (see VOM)
  Def. Defogger or Defroster
  Def. Defrost
  Defog. Defogger
  Diag. Diagnostic
  Dist. Distributor or Distribution
  Dr. Door
EAC Electric Assist Choke
  EACV Electric Air Control Valve
  EBCM Electronic Brake Control Module
  ECA Electronic Control Assembly
  ECAT Electronically Controlled Automatic Transaxle
  ECM Electronic Control Module
  ECT Engine Coolant Temperature Sensor
  ECU Electronic Control Unit or Engine Control Unit
  EDF Electric Drive Fan relay assembly
  EDIS Electronic Distributorless Ignition System
  EEC Electronic Engine Control
  EECS Evaporative Emission Control System
  EEPROM Electronically Erasable PROM
  EFE Early Fuel Evaporation
  EFI Electronic Fuel Injection
  EGO Exhaust Gas Oxygen sensor (see HEGO)
  EGR Exhaust Gas Recirculation system
  EGRC EGR Control solenoid or system
  EGRV EGR Vent solenoid or system
  EMR Emission Maintenance Reminder Module
  ESA Electronic Spark Advance
  ESC Electronic Spark Control
  EST Electronic Spark Timing
  ETR Emergency Tensioning Retractor
  EVAP Fuel Evaporative System
  EVIC Electronic Vehicle Information Center
  EVO Electronic Variable Orifice
  EVP EGR Valve Position Sensor
  EVR EGR Valve Regulator
  EVRV Electronic Vacuum Regulator Valve
  Elect. Electronic
  Eng. Engine
  Evap. Evaporative
  Exc. Except
F Fahrenheit (Degrees)
  F/B Fuse Block
  FBC Feedback Carburetor
  FI Fuel Injector or Fuel Injection
  FICD Fast Idle Control Device
  FIPL Fuel Injector Pump Lever
  FP Fuel Pump
  FPM Fuel Pump Monitor
  FPR-VSV Fuel Pressure Regulator Vacuum Switching Valve
  FWD Front Wheel Drive
  Fed. Federal
  Ft. Lbs. Foot Pounds
g grams
  GND or GRND Ground
  GRN Green
  GRY Gray
  Ga. Gauge
  Gals. gallons
  Gov. Governor
H/D Heavy Duty
  HAC High Altitude Compensation
  HC Hydrocarbons
  HEDF High Speed Electro Drive Fan relay or circuit
  HEGO Heated Exhaust Gas Oxygen Sensor
  HEGOG HEGO Ground circuit
  HEI High Energy Ignition
  HLDT Headlight
  HO High Output
  HP High Performance
  HSC High Swirl Combustion
  HSO High Specific Output
  HTR Heater
  HVAC Heating
  Headlt. Headlight
  Hg Mercury
  Hgt. Height
  Htr. Heater
  Hz Hertz (Cycles Per Second)
I.D. Inside Diameter
  IAC Idle Air Control
  IACV Idle Air Control Valve
  IC Integrated Circuit
  ID Identification
  IDM Ignition Diagnostic Monitor
  IGN Ignition system or circuit
  ILC Idle Load Compensator
  In. Hg Inches of Mercury
  INCH Lbs. Inch Pounds
  INFL REST Inflatable Restraint
  INJ Injector or Injection
  IP Instrument Panel
  IPC Instrument Panel Cluster
  ISA Idle Speed Actuator
  ISC Idle Speed Control
  ISS Idle Stop Solenoid
  ITS Idle Tracking Switch
  IVSV Idle Vacuum Switching Valve
  Ign. Ignition
  In. Inches
  Inj. Injector
J/B Junction Block
k/ohms 1000 ohms (kilo as in k/ohms)
  kg Kilograms (weight)
  kg/cmý Kilograms Per Square Centimeter
  KAM Keep Alive Memory
  KAPWR Keep Alive Power
  KM/H Kilometers Per Hour
  KOEO Key On Engine Off
  KOER Key On Engine Running
  KS Knock Sensor
L Liter(s)
  L/D Light Duty
  LCD Liquid Crystal Display
  LED Light Emitting Diode
  LH Left Hand
  LOS Limited Operation Strategy
  LT BLU Light Blue
  LT GRN Light Green
  LUS Lock-Up Solenoid
  Lbs. Pounds
  Lt(s). Light(s)
  Lugg. Luggage
mA Milliamps
  mV Millivolts
  mfd. Microfarads
  mm Millimeters
  M/T Manual Transaxle or Transmission
  MA PFI Mass Air Sequential Port Fuel Injection system
  MA or MAF Mass Airflow
  MAF Mass Air Flow sensor
  MAFS Mass Airflow Sensor
  MAP Manifold Absolute Pressure sensor
  MAT Manifold Air Temperature
  MCU Microprocessor Control Unit
  MCV Mixture Control Valve
  MEM-CAL Memory Calibration Chip
  MFI Multiport Fuel Injection
  MIL Malfunction Indicator Light
  MLP Manual Lever Position
  MPFI Multi Point Fuel Injection
  MPH Miles Per Hour
  MPI Multi-Point (Fuel) Injection
  Man. Manual
  Mech. Mechanical
  Mem. Memory
  Mtr. Motor
N.m Newton-Meter
  NA Not Available
  NDS Neutral Drive Switch
  NGS Neutral Gear Switch
  NOx Oxides of Nitrogen
  NPS Neutral Pressure Switch
  No. Number
  Nos. Numbers
O Oxygen
  O.D. Outside Diameter
  O/S Oversize
  O2 Oxygen
  OC Oxidation Catalyst
  OCC Output Circuit Check
  OD Overdrive
  ODO Odometer
  OHC Overhead Camshaft
  ORG Orange
  OSC Output State Check
  Opt. Option or Optional
  oz. Ounce
  ozs. Ounces
P Park
  P/C Printed Circuit
  P/N Park/Neutral
  P/S Power Steering
  PAV Pulse Air Valve
  PC-SOL Purge Control Solenoid
  PCM Powertrain Control Module
  PCS Purge Control Solenoid
  PCSDM Passenger Compartment Sensor/Diagnostic Module
  PCV Positive Crankcase Ventilation
  PFE Pressure Feedback EGR sensor or circuit
  PFI Port Fuel Injection (see MA SEFI)
  PGM-CARB Programmed Carburetor
  PGM-FI Programmed Fuel Injection
  PIP Profile Ignition Pickup
  PNK Pink
  PPL Purple
  PRNDL Park Reverse Neutral Drive Low
  PROM Programmable Read-Only Memory
  psi Pounds Per Square Inch
  PSPS Power Steering Pressure Switch
  PTC Positive Temperature Coefficient
  PTO Power Take-Off
  PWR GND Power Ground circuit
  Pkg. Package
  Press. Pressure
  Prog. Programmed or Programmable
  Pts. Pints
  Pwr. Power
Qts. Quarts
RABS Rear Anti-Lock Brake System
  RAC Remote Accessory Control
  RAM Random Access Memory
  RAP Retained Accessory Power
  RECIRC Recirculation
  RED Red
  RH Right Hand
  ROM Read Only Memory
  RPM Revolutions Per Minute
  RVB Rear Vacuum Break
  RWAL Rear Wheel Anti-Lock Brake
  RWD Rear Wheel Drive
  Recirc. Recirculate or Recirculation
  Reg. Regulator
  Rly. Relay
SBC Single Bed Converter
  SBEC Single Board Engine Controller
  SC Super Charged
  SCC Spark Control Computer
  SCS Air Suction Control Solenoid
  SDM Supplemental Restraint System Diagnostic Module
  SDU SRS Diagnostic Unit
  SEN Sensor
  SES Service Engine Soon
  SFI Sequential (Port) Fuel Injection
  SIG RTN Signal Return circuit
  SIL Shift Indicator Light
  SIR Supplemental Inflatable Restraint
  SMEC Single Module Engine Controller
  SOHC Single Overhead Cam
  SOL or Sol. Solenoid
  SPFI Sequential Port Fuel Injection
  SPK Spark Control
  SPOUT Spark Output Signal
  SRS Supplemental Restraint System (Air Bag)
  SS 3/4-4/3 Shift Solenoid circuit
  SSI Solid State Ignition
  STAR Self-Test Automatic Readout
  STI Self Test Input circuit
  STO Self-Test Output
  SUB-O2 Sub Oxygen Sensor
  Sen. or Sens. Sensor
  Sol. Solenoid
  Sprchg. Supercharger
  Strg. Steering
  Susp. Suspension
  Sw. Switch
  Sys. System
T.V. Throttle Valve
  TAB Thermactor Air By-Pass
  TAC Thermostatic Air Cleaner
  TAD Thermactor Air Diverter
  TAN Tan
  TBI Throttle Body Injection
  TCC Torque Converter Clutch
  TCCS Toyota Computer Control System
  TDC Top Dead Center
  TDCL Total Diagnostic Communication Link
  TFI Thick Film Ignition system
  TGS Top Gear Switch (cancels SIL in top gear)
  THERMAC Thermostatic Air Cleaner
  THS Transmission Hydraulic Switch
  TP/TPS Throttle Position Sensor
  TPI Tuned Port Injection
  TPS Throttle Position Sensor/Switch
  TS Temperature Sensor
  TSB Technical Service Bulletin
  TTS Transmission Temperature Switch
  TV Thermovalve
  TWC Three-Way Catalyst
  Temp. Temperature
V Valve
  VAF Vane Air Flow sensor or circuit
  VAPS Variable Assist Power Steering
  VAT Vane Air Temperature
  VATS Vehicle Anti-Theft System
  VBATT Vehicle Battery Voltage
  VCC Viscous Converter Clutch
  VIN Vehicle Identification Number
  VIO Violet
  VLR Volt Loop Reserve
  VM Vacuum Modulator
  VM Vane Meter
  VOM Volt-Ohmmeter (Analog)
  VPWR Vehicle Power supply voltage (10-14 volts)
  VREF Voltage Reference (ECA supplied reference voltage
  VRV Vacuum Regulator Valve
  VSC Vehicle Speed Control sensor or signal
  VSS Vehicle Speed Sensor or signal
  VSV Vacuum Switching Valve
  Vac. Vacuum
  Volt. Voltage
W/ With
  W/O Without
  WAC WOT A/C Cut-off switch or circuit
  WAC Wide Open Throttle A/C Switch
  WHT White
  WOT Wide Open Throttle
YEL Yellow

 

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