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.
Electronic Control Assembly (ECA)
ECA monitors engine operating conditions by input received from engine sensors. Control of output actuators determines fuel mixture and idle speed. For ECA location, see ELECTRONIC CONTROL ASSEMBLY (ECA) LOCATIONS .
The engine control system consists of the ECA, relays, sensors, switches and actuators. The ECA sends out electrical reference signals to engine sensors and then analyzes the return signals. The engine sensors supply the ECA with specific information, in the form of electrical signals, to determine engine operating conditions. In the event of a sensor or actuator failure, the ECA initiates an alternative strategy called Failure Mode Effects Management (FMEM) to allow the vehicle to maintain driveability.
The CHECK ENGINE light will remain on whenever FMEM is in operation. FMEM substitutes a fixed sensor signal and continues to monitor the failed sensor. If the signals from a faulty sensor return to within operating limits, the ECA will resume using the sensor's signal.
| Application | Location | |
|---|---|---|
| Continental | Right Rear Corner Of Compartment | |
| Cougar & Thunderbird | Behind Right Kick Panel | |
| Crown Victoria & Grand Marquis | Behind Right Kick Panel | |
| Escort & Tracer | ||
| 1.8L | On Center Console Behind Kick Panel | |
| 1.9L | Left Of Steering Column Under Dash Panel | |
| Mark VII | Behind Right Kick Panel | |
| Mustang | Behind Right Kick Panel | |
| Probe | ||
| 2.2L | On Floor Panel In Front Of Console | |
| 3.0L | Behind Glove Box | |
| Sable & Taurus | Right Rear Corner Of Engine Compartment | |
| Tempo & Topaz | Left Of Steering Column Under Dash Panel | |
| Town Car | Under Left Side Of Instrument Panel | |
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.