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 MANUALSFORD1993BRONCO 5.0 N, AUTOMATIC, E4ODREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - GASOLINEIGNITION SYSTEMS
1993 Ford Bronco 5.0 N, Automatic, E4OD
Ignition Systems
1993 Ford Bronco 5.0 N, Automatic, E4ODSECTION Ignition Systems
NOTE:
For additional information and descriptions, see IGNITION SYSTEMS in THEORY/OPERATION
article in the ENGINE PERFORMANCE Section. Perform spark output check in BASIC TESTING
article in the ENGINE PERFORMANCE Section before these tests. Some ignition systems require that QUICK TEST be performed before testing. This will retrieve trouble codes from EEC-IV system. See appropriate TESTS W/CODES
article in the ENGINE PERFORMANCE Section.
IGNITION SYSTEM ACRONYMS (1)
| Acronym | Definition | ||
|---|---|---|---|
| BAT+ Or BAT (+) | Battery Positive | ||
| BAT- Or BAT (-) | Battery Negative | ||
| BOB | Breakout Box | ||
| CCD | Computer Controlled Dwell | ||
| CID | Cylinder Identification | ||
| C1, C2, C3 | Coil Drive (Coils 1, 2 & 3) | ||
| DI | Distributor Ignition System | ||
| EI | Electronic Ignition System (Distributorless) | ||
| DPI | Dual Plug Inhibit (High Signal, Right Plugs Fire; Low Signal, Both Sides Fire) | ||
| ICM | Ignition Control Module | ||
| IDM | Ignition Diagnostic Monitor (Diagnostic Signal To PCM) | ||
| IGGND | 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 | ||
| PIP | Profile Ignition Pickup (Crankshaft Sensor Signal) | ||
| PWR GND | Power Ground Circuit To DIS Module | ||
| SPOUT | Spark Output (PCM Spark Control Signal) | ||
| VPWR Or VBAT | Battery Power Or Battery Voltage | ||
|
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IGNITION SYSTEM IDENTIFICATION
| Application | System | |
|---|---|---|
| 2.3L | EI Low Data Rate | |
| 3.0L | DI (CCD) | |
| 4.0L | EI High Data Rate | |
| 4.9L | DI (Push Start) | |
| 5.0L | ||
| Bronco & Pickup | DI (Push Start) | |
| Van | DI (CCD) | |
| 5.8L & 7.5L | DI (Push Start) | |
RENDER: 1.0x
NO RELATED
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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.