Frequently Used EEC-IV Abbreviations
FREQUENTLY USED EEC-IV ABBREVIATIONS
| Abbreviation | Meaning |
|---|---|
| A/C: | Air Conditioning |
| ACCS: | A/C Cycling Switch |
| ACC: | A/C Clutch Compressor |
| ACT: | Air Charge Temperature sensor |
| ACV: | Thermactor Air Control Valve |
| BOO: | Brake On/Off switch |
| BP: | Barometric Pressure sensor |
| CANP: | Canister Purge solenoid |
| CCO: | Converter Clutch Override |
| CFI: | Central Fuel Injection |
| CID: | Cylinder Identification sensor |
| CKT: | Circuit |
| DIS: | Direct Ignition System |
| DVOM: | Digital Volt/Ohm Meter (see VOM) |
| ECA: | Electronic Control Assembly, processor, computer |
| ECT: | Engine Coolant Temperature sensor |
| EDF: | Electric Drive Fan relay assembly |
| EEC: | Electronic Engine Control |
| EGO: | Exhaust Gas Oxygen sensor (see HEGO) |
| EGR: | Exhaust Gas Recirculation system |
| EGRC: | EGR Control solenoid or system |
| EGRV: | EGR Vent solenoid or system |
| EVP: | EGR Position sensor |
| EVR: | EGR Valve Regulator |
| FI: | Fuel Injector or Fuel Injection |
| FP: | Fuel Pump |
| FPM: | Fuel Pump Monitor |
| FWD: | Front Wheel Drive |
| GND or GRND: | Ground |
| HEDF: | High Speed Electro Drive Fan relay or circuit |
| HEGO: | Heated EGO sensor |
| HEGOG: | HEGO Ground circuit |
| HO: | High Output |
| HSC: | High Swirl Combustion, engine type |
| IDM: | Ignition Diagnostic Module |
| IGN: | Ignition system or circuit |
| INJ: | Injector or Injection |
| ISC: | Idle Speed Control |
| ITS: | Idle Tracking Switch |
| KAM: | Keep Alive Memory |
| KAPWR: | Keep Alive Power |
| KOEO: | Key On Engine Off |
| KOER: | Key On Engine Running |
| KS: | Knock Sensor |
| L: | Liter(s) |
| LOS: | Limited Operation Strategy, computer function |
| LUS: | Lock-Up Solenoid |
| MAF: | Mass Air Flow sensor, meter or circuit |
| MAP: | Manifold Absolute Pressure sensor |
| MA PFI: | Mass Air Sequential Port Fuel Injection system |
| MCU: | Microprocessor Control Unit |
| MIL: | Malfunction Indicator Light |
| MPFI: | Multi Point Fuel Injection |
| NDS: | Neutral Drive Switch |
| NGS: | Neutral Gear Switch |
| NPS: | Neutral Pressure Switch |
| OCC: | Output Circuit Check |
| OHC: | Overhead Camshaft, engine type |
| OSC: | Output State Check |
| PFE: | Pressure Feedback EGR sensor or circuit |
| PFI: | Port Fuel Injection |
| PIP: | Profile Ignition Pickup |
| PSPS: | Power Steering Pressure Switch |
| PWR GND: | Power Ground circuit |
| RWD: | Rear Wheel Drive |
| SC: | Super Charged, engine type |
| PFI: | Port Fuel Injection (see MA SEFI) |
| SIG RTN: | Signal Return circuit |
| SIL: | Shift Indicator Light |
| SPOUT: | Spark Output Signal, from ECA |
| SS 3/4 - 4/3: | Shift Solenoid circuit |
| STAR: | Self Test Automatic Readout, test equipment |
| STI: | Self Test Input circuit |
| STO: | Self Test Output circuit |
| TAB/TAD: | Thermactor Air Bypass/Thermactor Air Diverter Tandem solenoid valves operated by separate circuits. |
| TFI: | Thick Film Ignition system |
| TGS: | Top Gear Switch (cancels SIL operation in top gear) |
| THS: | Transmission Hydraulic Switch |
| TP/TPS: | Throttle Position Sensor |
| TTS: | Transmission Temperature Switch |
| VAF: | Vane Air Flow sensor or circuit |
| VAT: | Vane Air Temperature |
| VBATT: | Vehicle Battery Voltage |
| VM: | Vane Meter |
| VOM: | Analog Volt/Ohm Meter (see DVOM) |
| VPWR: | Vehicle Power supply voltage (regulated 10-14 volts) |
| VREF: | Voltage Reference (ECA supplied reference voltage, 4-6 volts) |
| VSC: | Vehicle Speed Control sensor or signal |
| VSS: | Vehicle Speed Sensor or signal |
| WAC: | WOT A/C Cut-off switch or circuit |
| WOT: | Wide Open Throttle |