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<strong>Technical</strong> <strong>Bulletin</strong>Subject:Model(s):J 1930 Nomenclature RevisionsAll1993 Group:Number:Date:0096–03Dec. 27,1996Supersedes T.B. 00-95-02, dated Nov. 20, 1995Beginning with Model Year 1994 (1993 in California), EPA regulations require that certain words andterms (nomenclature) must be uniformly applied by all manufacturers in their Service Literature.when referring to emission related components and systems.Some of the new terms may at first seem unfamiliar but they will be used uniformly by all manufacturerswhen referring to these same components or systems.This technical bulletin is a living document. While not complete, this list attempts to cover those applicationspresently being used by Audi and Volkswagen Publications. When new nomenclature isdeveloped, this technical bulletin will be updated.Use the information contained in this <strong>Technical</strong> <strong>Bulletin</strong> as a reference when naming or identifyingcomponents. Additions to the previous bulletin appear in bold.Old Term New Term AbbreviationsAccelerator Pedal Accelerator Pedal APActivated Charcoal Canister Evaporative Emission Canister EVAP CanisterActivated Charcoal Lines Evaporative Emission Lines EVAP LinesAir Conditioning Air Conditioning A/CAir Conditioning System Air Conditioning System A/C SystemAir Conditioning Compressor Clutch Air Conditioning Clutch A/C ClutchAir Filter Air Cleaner ACLAir Filter Housing Air Cleaner Housing ACL HousingAir Filter Element Air Cleaner Element ACL ElementAir Flow Meter Mass Air Flow Sensor or MAF Sensor orVolume Air Flow Sensor*VAF Sensor*Air Flow Sensor Mass Air Flow Sensor or MAF Sensor orVolume Air Flow Sensor*VAF Sensor*Air Flow Sensor Potentiometer Volume Air Flow VAF PositionPosition SensorSensorAir Injection Secondary Air Injection AIRAir Injection Secondary Air Injection Pump AIR PumpAir Intake Hose Intake Air Duct IA DuctAir Mass Mass Air Flow MAFAir Mass Meter Mass Air Flow Sensor MAF SensorAir Mass Sensor Mass Air Flow Sensor MAF SensorAll–Wheel–Drive Full Time Four Wheel Drive F4WDAlternator Generator GENAltitude Sensor Barometric Pressure Sensor BARO SensorAmbient Air Temperature Ambient Air Temperature AATAutomatic Transmission Automatic Transmission A/T*Correct term depends on vehicle application and fuel system.C 1© 1996 Audi of America, Inc.
<strong>Technical</strong> <strong>Bulletin</strong>Old Term New Term AbbreviationsCoolant Temperature Engine Coolant Temperature ECTCoolant Temperature Sensor Engine Coolant Temperature Sensor ECT SensorCoolant Temperature Switch Engine Coolant Temperature Switch ECT SwitchCrankcase Breather Positive Crankcase PCV ValveVentilation ValveCrankshaft Position Sensor Crankshaft Position Sensor CKP SensorDiagnostic Connector Data Link Connector DLCDiagnostic Test Mode Diagnostic Test Mode DTMDiagnostic Trouble Code Diagnostic Trouble Code DTCDigifant System Digifant Multiport Fuel Digifant MFIInjectionDigimat Control Unit Digimat Transmission Control Digimat TCMModuleDigital Idle Stabilizer Idle Speed Control ISCDistributor Ignition Distributor Ignition DIDirect Injection Direct Fuel Injection DFIDistributorless Ignition Electronic Ignition EIDriving Range Transmission Range TRDynamic Pressure Control Dynamic Pressure Control Dynamic PCDIS (Digital Idle Stabilization) Idle Speed Control ISCECU Engine Control Module ECMEGR Temperature Exhaust Gas Recirculation Temperature EGRTEGR Temperature Sensor Exhaust Gas Recirculation Temperature Sensor EGRT SensorEGR Vacuum Regulator Solenoid EGR Vacuum Regulator Solenoid EGR RegulatorSolenoidElectric Fuel Pump Fuel Pump FPElectronic Ignition Electronic Ignition EIElectronic Ignition System Electronic Ignition System EI SystemEmission Control System (ECS)Indicator Light Malfunction Indicator Lamp MILEngine Coolant Level Engine Coolant Level ECLEngine CoolantEngine CoolantTemperature Sensor Engine Coolant Temperature Sensor ECT SensorEngine Control Unit Engine Control Module ECMEngine Speed Engine Speed RPMEngine Speed/Reference Sender Engine Speed Sensor RPM SensorEngine Temperature Engine Coolant Temperature ECTEvaporative Emission Evaporative Emission EVAPEvaporative Emission Canister Evaporative Emission Canister EVAP CanisterExhaust Gas Recirculation Exhaust Gas Recirculation EGRExhaust Gas Recirculation Exhaust Gas Recirculation EGRT SensorTemperature SensorTemperature SensorExhaust Gas Recirculation Valve Exhaust Gas Recirculation Valve EGR ValveExhaust Warning Lamp Malfunction Indicator Lamp MILC 3© 1996 Audi of America, Inc.
<strong>Technical</strong> <strong>Bulletin</strong>Old Term New Term AbbreviationsFan Control Module Fan Control Module FC ModuleFan Control Low Speed Fan Control Switch Low Speed FCSwitchFan Relay Fan Control Relay FC RelayFault Code Diagnostic Trouble Code DTCFault Memory Diagnostic Trouble Code Memory DTC MemoryFinal Element Analysis Output Diagnostic Test Mode Output DTMFiring Point Sensor Crankshaft Position Sensor CKP SensorFlame Ionization Dector Flame Ionization Detector FIDFlash Code Diagnostic Trouble Code DTCFourth Gear Fourth Gear 4GRFreeze Frame Freeze Frame FRZFFront Wheel Drive Front Wheel Drive FWDFuel Injector Fuel Injector FIFuel metering Fuel Trim FTFuel Pressure Fuel Pressure –––Fuel Pump Fuel Pump FPFuel Pump Relay Fuel Pump Relay FP RelayFuel Trim Short Term Short Term Fuel Trim Short Term FTFuel Trim Long Term Long Term Fuel Trim Long Term FTFuel Level Sensor Fuel Level Sensor Fuel Level SensorFull Load Wide Open Throttle WOTFull Throttle Wide Open Throttle WOTFull Throttle Switch Wide Open Throttle Switch WOT SwitchG-Charger Supercharger SCGovernor Control Unit Governor Control Module GCMGlow Plug Glow Plug Glow PlugGround Ground GNDHall Control Unit Ignition Control Module ICMHall Generator Camshaft Position Sensor CMP SensorHall Generator control Unit Ignition Control Module ICMHall Sensor (G 40) Camshaft Position Sensor CMP SensorHall Sensor Ignition Distributor Ignition DIHall Speed Sensor, speedometer Speedometer Vehicle Speed Sensor Speedometer VSSHeated Oxygen Sensor Heated Oxygen Sensor HO2SHeated O2 Sensor Heated Oxygen Sensor HO2SHot Wire Mass Air Flow Sensor MAF SensorC 4© 1996 Audi of America, Inc.
<strong>Technical</strong> <strong>Bulletin</strong>Old Term New Term AbbreviationsIdle Air Stabilization Valve Idle Air Control Valve IAC ValveIdle Position Closed Throttle Position CTPIdle Stabilization System Idle Air Control IACIdle Stabilizer Valve Idle Air Control Valve IAC ValveIdling Speed Control Idle Speed Control ISCIdle Switch Closed Throttle Position Switch CTP SwitchIgnition Cable/Connector Spark Plug Wire Spark Plug WireIgnition Control Unit Ignition Control Module ICMIgnition Reference Sensor Crankshaft Position Sensor CKP SensorIgnition Timing Sensor Crankshaft Position Sensor CKP SensorInspection and Maintenance Inspection and Maintenance I/MIntake Air Temperature Intake Air Temperature IATIntake Air Temperature Sensor Intake Air Temperature Sensor IAT SensorIntake Manifold Pressure Sensor Manifold Absolute Pressure Sensor MAP SensorIntake Manifold Differential Manifold DifferentialPressure Pressure MDPIntake Manifold SurfaceManifold SurfaceTemperature Temperature MSTIntake Manifold Change-over Intake Manifold Tuning Valve IMT ValveIntake Manifold Vacuum Range Manifold Vacuum Zone MVZIntercooler Charge Air Cooler CACKnock Sensor Knock Sensor KSKnock Sensor Control Unit Ignition Control Module ICMLED Indicator Malfunction Indicator Lamp MILLong Term Fuel Trim Long Term Fuel Trim Long Term FTManifold Differential Pressure Manifold Differential Pressure MDPManifold Pressure Sensor Manifold Absolute Pressure Sensor MAP SensorManifold Pressure Manifold Absolute Pressure MAPMass Air Flow Sensor Mass Air Flow Sensor MAF SensorMass Air Flow Mass Air Flow MAFMixture Control Unit Volume Air Flow Sensor VAF SensorMixture Control Mixture Control MCMono-Motronic Throttle Body Fuel Injection TBIMotronic System Motronic Multiport Fuel Injection Motronic MFIMPI Fuel Injection System MPI Multiport Fuel Injection MPI MFIMultifunction Indicator Lamp Multifunction Indicator Lamp MILMulti-fuel (Vehicles) Flexible Fuel FFMulti-point Fuel Injection Multi-port Fuel Injection MFIC 5© 1996 Audi of America, Inc.
<strong>Technical</strong> <strong>Bulletin</strong>Old Term New Term AbbreviationsNeutral Safety Switch Park/Neutral Position Switch PNP SwitchNTC (Negative Temperature Engine Coolant Temperature Sensor ECT SensorCoefficient) SensorNon Volatile RandomNon Volatile RandomAccess Memory Access Memory NVRAMOBD Lamp Malfunction Indicator Lamp MILOpen Loop Open Loop OLOil Pressure Engine Oil Pressure EOPOil Pressure Sensor Engine Oil Pressure Sensor EOP SensorOil Pressure Switch Engine Oil Pressure Switch EOP SwitchOil Temperature Engine Oil Temperature EOTOn Board Diagnostic On Board Diagnostic OBDOxidation Catalyst Oxidation Catalytic Converter OCO2 Sensor Oxygen Sensor O2SOxygen Sensor Oxygen Sensor O2SOutput Check Diagnosis Output Diagnostic Test Mode Output DTMOverrun Cut-off Fuel Shutoff (not in J19030)PCV Valve Positive Crank Case Ventilation PCV ValvePCV Positive Crankcase Ventilation PCVPulse Width Modulation Pulse Width Modulation PWMPressure Damper Fuel Pressure Regulator –––Pressure Relief Valve Evaporative Pressure Relief Valve EVAP PR ValvePRNDL Transmission Range TRPurge Regulator Valve Purge Regulator Valve –Radiator Cooling Fan Coolant Fan –––Radiator Cooling Engine Coolant Fan Control FCRandom Acess Memory Random Acess Memory RAMRadiator Fan Run-On After Run Coolant Fan After-Run Coolant FanRead Only Memory Read Only Memory ROMRear Wheel Drive Rear Wheel Drive RWDReference Sensor Crankshaft Position Sensor CKP SensorRoad Speed Sensor Vehicle Speed Sensor VSSC 6© 1996 Audi of America, Inc.
<strong>Technical</strong> <strong>Bulletin</strong>Old Term New Term AbbreviationsSecondary Air Secondary Air Injection AIRSecondary Air Injection Bypass Secondary Air Injection Bypass AIR BypassSecondary Air InjectionSecondary Air InjectionBypass Valve Bypass Valve AIR Bypass ValveSecondary Air InjectionSecondary Air InjectionSolenoid Valve Control Valve AIR Control ValveSecondary Air Injection Diverter Secondary Air Injection Diverter AIR DiverterScan Tool Scan Tool STSequential MultipointSequential MultiportFuel Injection Fuel Injection SFISelf-Diagnosis On Board Diagnostic OBDService Reminder Light Service Reminder Indicator SRISpark Plug Spark Plug Spark PlugSpeed Sender or Sensor Vehicle Speed Sensor VSSSystem Readiness Test System Readiness Test SRTTemperature Regulator Thermal Vacuum Valve TVVTemperature Sensor Engine Coolant Temperature Sensor ECT SensorThermo-Time Switch Engine Coolant Temperature Switch ECT SwitchThermo-Vacuum Switch Thermal Vacuum Valve TVVThird Gear Third Gear 3GRThree-Way Catalyst Three Way Catalytic Converter TWCThrottle Potentiometer Throttle Position Sensor TP SensorThrottle Switches Throttle Position Switches TP SwitchesThrottle Valve Throttle Acuator Control TACThrottle Actuator Control Module Throttle Acuator Control Module TAC ModuleThrottle Valve Housing Throttle Body TBThrottle Body Fuel InjectionTBIThrottle Valve Potentiometer Throttle Position Sensor TP SensorTorque Converter Clutch Torque Converter Clutch TCCTransmission Control Unit Transmission Control Module TCMTransmission Fluid Pressure Transmission Fluid Pressure TFPTransmission Fluid Temperature Transmission Fluid Temperature TFTTurbocharger Turbocharger TCTurbocharger Wastegate Turbocharger Wastegate TC WastegateTurbocharger WastegateTurbocharger WastegateRegulating Valve Regulating Valve TC WastegateRegulating Valve4th Gear Fourth Gear 4GRC 7© 1996 Audi of America, Inc.
<strong>Technical</strong> <strong>Bulletin</strong>Vacuum Booster EGR Vacuum Amplifier –––VAG 1551 Diagnostic Tester VAG 1551 Scan Tool VAG 1551 STVAG 1552 VAG 1552 Scan Tool VAG 1552 STVehicle Identification Number Vehicle Identification Number VINVoltage Regulator Voltage Regulator VRVolume Air Flow Volume Air Flow VAFVolume Air Flow Sensor Volume Air Flow Sensor VAF SensorWarning Light Malfunction Indicator Lamp MILWide Open Throttle Wide Open Throttle WOTWide Open Throttle Switch Wide Open Throttle Switch WOT Switch3rd Gear Third Gear 3GRC 8© 1996 Audi of America, Inc.
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