Electronic Control Assembly (ECA)
During system operation, ECA transmits electrical reference signals to engine sensors and analyzes return signals to determine engine operating conditions. See Fig 1. If a sensor or actuator fails, ECA initiates an alternative strategy, allowing vehicle to maintain driveability. This strategy is called Failure Mode Effects Management (FMEM).
The CHECK ENGINE light will illuminate and remain on whenever FMEM is in operation. The ECA, overriding failed component with a FMEM substitute operation value, continues to monitor failed sensor. Should signals from faulty sensor return to within operational limits, ECA will cancel FMEM and resume control based on sensor signals.
ECA LOCATION
| Application | Location |
|---|---|
| Aerostar | Under Left Instrument Panel |
| Bronco & "F" Series | Behind Left Kick Panel |
| "E" Series | Under Right Instrument Panel |
| Explorer & Ranger | Behind Right Kick Panel |
NOTE:
Components are grouped into 2 categories. The first category is INPUT DEVICES, covering components which control or produce voltage signals monitored by the ECA. The second category is OUTPUT SIGNALS, covering components controlled by the ECA.