Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1988AEROSTAR VAN PASSENGER, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMEEC-IV CEC SYSTEMQUICK TESTCOMMON EEC-IV ABBREVIATION DEFINITIONS
1988 Ford Aerostar Van Passenger, Automatic
Common EEC-IV Abbreviation Definitions
1988 Ford Aerostar Van Passenger, AutomaticSECTION Common EEC-IV Abbreviation Definitions
ABBREVIATIONS
| Abbreviation | Application |
|---|---|
| A/C | Air Conditioning |
| ACCS | A/C Cycling Switch |
| ACC | A/C Clutch Compressor |
| ACT | Air Charge Temperature sensor |
| ACV | Thermactor Air Control Valve |
| AXOD | Automatic Transaxle Overdrive |
| BOO | Brake On/Off switch |
| BP | Barometric Pressure sensor |
| CANP | Canister Purge solenoid |
| CCO | Converter Clutch Override |
| CFI | Central Fuel Injection |
| 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 |
| 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 SEFI | Mass Air Sequential 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 |
| PIP | Profile Ignition Pickup |
| PSPS | Power Steering Pressure Switch |
| PWR GND | Power Ground circuit |
| RWD | Rear Wheel Drive |
| SEFI | Sequential 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 or 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 V) |
| VREF | Voltage Reference (ECA supplied reference voltage, 4-6 V) |
| 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 |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.