Powertrain Diagnostic Procedures: Acronyms: Notes
AIR CONDITIONING REFERENCE
| A/C | Air Conditioning |
| ABS | Anti-lock Brake System |
| ASD Relay | Auto Shutdown Relay |
| APPS | Accelerator Pedal Position Sensor |
| Baro | Barometric Pressure |
| BCM | Body Control Module |
| BTS | Battery Temperature Sensor |
| CAA | Clean Air Act |
| CAB | Controller Antilock Brakes |
| CARB | California Air Resources Board |
| CCD BUS | Chrysler Collision Detection Bus |
| CKP Sensor | Crankshaft Position Sensor |
| CKT | Circuit |
| CMP Sensor | Camshaft Position Sensor |
| CM840 | Cummins Engine controller |
| CO | Carbon Monoxide |
| CVI | Clutch Volume Index |
| DCP Solenoid | Duty-Cycle Purge Solenoid |
| DLC | Data Link Connector |
| DRBIII® | Diagnostic Readout Box - 3rd Generation |
| DTC | Diagnostic Trouble Code |
| DVOM | Digital Volt Ohm Meter |
| EATX | Electronic Automatic Transmission Controller |
| ECT Sensor | Engine Coolant Temperature Sensor |
| EEPROM | Electrically Erasable Programmable Read Only Memory |
| EGR Valve | Exhaust Gas Recirculation Valve |
| EMCC | Electronically Modulated Converter Clutch |
| EMI | Electro-Magnetic Interference |
| EOBD | European OBD (based upon Euro Stage III) |
| EPA | Environmental Protection Agency |
| EPP | Engine Position Pulse |
| ETC | Electronic Throttle Control |
| EU | European Union |
| EVAP | Evaporative Emission System |
| EVR | Electronic Voltage Regulator |
| EWMA | Exponentially Weighted Moving Average |
| FEMCC | Fully Electronically Modulated Converter Clutch |
| FTP | Federal Test Procedure |
| FSS | Fan Speed signal |
| HC | Hydrocarbons |
| HO2S | Heated Oxygen Sensor |
| Generator | Previously called "alternator" |
| IAC Motor | Idle Air Control Motor |
| IAT Sensor | Intake Air Temperature Sensor |
| IOD | Ignition off draw |
| IRT | Intelligent Recovery Timer |
| ISS | Input Speed Sensor |
| I/M | Inspection and Maintenance Testing |
| JTEC | Jeep/Truck Engine Controller |
| LDP | Leak Detection Pump |
| LED | Light Emitting Diode |
| LPS | Line Pressure Sensor |
| LR | Low/reverse Clutch |
| LSIACV | Linear Solenoid Idle Air Control Valve |
| MAF | Mass Air flow |
| MAP Sensor | Manifold Absolute Pressure Sensor |
| MDS2 2 ® | Mopar Diagnostic System 2nd Generation |
| MIL | Malfunction Indicator Lamp |
| MS | Multi Select |
| MTV | Manifold Tuning Valve |
| NGC | Next Generation Controller |
| NTC | Negative Temperature Coefficient |
| NVLD | Natural Vacuum Leak Detection |
| O 2 Sensor | Oxygen Sensor |
| O2S | Oxygen Sensor |
| OBD | I On Board Diagnostics 1st Generation |
| OBD | II On-Board Diagnostics 2nd Generation |
| OD | Overdrive Clutch |
| ORVR | On-Board Refueling Vapor Recovery |
| OSS | Output Speed Sensor |
| PCI BUS | Programmable Communications Interface BUS (J1850) |
| PCM | Powertrain Control Module |
| PCS | Pressure Control Solenoid |
| PCV | Positive Crankcase Ventilation |
| PDC | Power Distribution Center |
| PEMCC | Partial Electronically Modulated Converter Clutch |
| PEP | Peripheral Expansion Port |
| P/N | Park/Neutral |
| PPS | Proportional Purge Solenoid |
| PS | Power Steering |
| PSP | Power Steering Pressure (Switch) |
| PTC | Positive Temperature Coefficient |
| PWM | Pulse-Width Modulation |
| RAM | Random Access Memory |
| REV | Reverse Clutch |
| RFI | Radio Frequency Interference |
| RKE | Remote Keyless Entry |
| RPM | Revolutions Per Minute |
| SAE | Society of Automotive Engineers |
| SBEC | Single Board Engine Controller |
| SCW | Similar Conditions Window |
| SKIM | Sentry Key Immobilizer Module |
| SRV | Short Runner Valve |
| SSV | Solenoid Switch Valve |
| SW | Switch |
| TCC | Torque Converter Clutch |
| TCCM | Transfer Case Control Module |
| TDC | Top Dead Center |
| TP | Throttle Position Sensor |
| TRD | Torque Reduction |
| TRS | Transmission Range Sensor |
| TTS | Transmission Temperature Sensor |
| UD | Underdrive Clutch |
| VSS | Vehicle Speed Signal |
| WOT | Wide Open Throttle |
| 2/4 | 2nd and 4th gear Clutch or Pressure Switch |
| 2C | 2nd Clutch |
| 4C | 4th Clutch |