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 MANUALSFORD1991RANGER 4WD V6-245 4.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDESCRIPTION AND OPERATIONELECTRONIC CONTROL ASSEMBLY (ECA)
1991 Ford Ranger 4WD V6-245 4.0L
Electronic Control Assembly (ECA)
1991 Ford Ranger 4WD V6-245 4.0LSECTION Electronic Control Assembly (ECA)
The Electronic Control Assembly (ECA) receives ignition ground and Profile Ignition Pickup (PIP) signals from the EDIS module then generates a Spark Angle Word (SAW) output signal based on fuel, air and other sensor information. An IDM signal is received from the EDIS module to determine if a failure mode should be recorded. For diagnosis and testing of the ECA refer to "COMPUTERIZED ENGINE CONTROLS".
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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.