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 MANUALSFORD1994ASPIRE SE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES
1994 Ford Aspire SE, Automatic
Engine Controls - Tests W/Codes
1994 Ford Aspire SE, AutomaticSECTION Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- Quick Tests
- Summary
- Pinpoint Tests
- How To Use Pinpoint Tests
- Pcm Location
- Pinpoint Test CKP - Crankshaft Position Sensor
- Pinpoint Test EVP - EGR Valve Position (EVP) Sensor
- Pinpoint Test Kc - Knock Control
- Pinpoint Test MAF - Mass Airflow Meter
- Pinpoint Test VSS - Vehicle Speed Sensor
- Pinpoint Test ECT - Engine Coolant Temperature Sensor
- Pinpoint Test IAT - Intake Air Temperature Sensor
- Pinpoint Test TP - Throttle Position Sensor
- Pinpoint Test BARO - Barometric Pressure Sensor
- Pinpoint Test O2S - Oxygen Sensor
- Pinpoint Test SCG - Solenoid Controlled By Ground
- Pinpoint Test PGC - Power & Ground Connections
- Pinpoint Test STI - Self-Test Input
- Pinpoint Test STO - Self-Test Output
- Pinpoint Test Mil - Malfunction Indicator Light
- Pinpoint Test Roc - Relay Output Check
- Pinpoint Test STG - Switch To Ground
- Pinpoint Test STP - Switch To Power
- Pinpoint Test VPWR - Vehicle Power
- Pinpoint Test VREF - Reference Voltage & Signal Return
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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.