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 MANUALSFORD1994TAURUS GL, 4D SEDAN, 3.8 4REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - SYSTEM/COMPONENT TESTS - EEC-IV (3.8L)IGNITION SYSTEMNOTES
1994 Ford Taurus GL, 4D Sedan, 3.8 4
Ignition System: Notes
1994 Ford Taurus GL, 4D Sedan, 3.8 4SECTION Notes
NOTE:
For additional information and descriptions, see IGNITION SYSTEM in THEORY/OPERATION - EEC-IV 3.8L
article in the ENGINE PERFORMANCE section.
IGNITION SYSTEM ACRONYMS
| Acronym (1) | Definition | ||||
|---|---|---|---|---|---|
| B + Or B (+) | Battery Positive | ||||
| B- Or B (-) | Battery Negative | ||||
| C1, C2, C3 | Coil Drive (Coils 1, 2 & 3) | ||||
| DI | Distributor Ignition System | ||||
| EI (2) | Electronic Ignition (High Data Rate Or Low Data Rate) | ||||
| FTO | Filtered Tach Output | ||||
| ICM | Ignition Control Module | ||||
| IDM | Ignition Diagnostic Monitor (Diagnostic Signal To PCM) | ||||
| IGND | Ignition Ground (Low Current Ground Reference) | ||||
| KOEC | Key On Engine Cranking (Testing Condition) | ||||
| KOEO | Key On Engine Off (Testing Condition) | ||||
| KOER | Key On Engine Running (Testing Condition) | ||||
| PCM | Powertrain Control Module (EEC-Processor, Computer, Processor) | ||||
| PIP | Profile Ignition Pick-Up (Camshaft Position Sensor Signal) | ||||
| PWR GND | Power Ground Circuit To ICM | ||||
| SPOUT | Spark Output (PCM Spark Control Signal) | ||||
| VPWR Or VBAT | Battery Power Or Battery Voltage | ||||
|
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IGNITION SYSTEM IDENTIFICATION
| Application | System | |||||
|---|---|---|---|---|---|---|
| Continental | DI | |||||
| Cougar & Thunderbird | ||||||
| 3.8L | (1) | |||||
| 3.8L SC | (2) EI | |||||
| Sable & Taurus | ||||||
| 3.8L | DI | |||||
|
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RENDER: 1.0x
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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.