Powertrain Control Module (Pcm)
During system operation, PCM transmits electrical reference signals to engine sensors and analyzes return signals to determine engine operating conditions. See Fig 1. If a sensor, circuit or actuator fails, PCM initiates an alternative strategy, allowing vehicle to continue to be driven. This strategy is called Failure Mode Effects Management (FMEM).
The MIL light will glow and stay on whenever FMEM occurs. During FMEM, the PCM continues to monitor failed sensor/circuit. Should sensor/circuit signals return to normal, PCM will cancel FMEM and resume control based on sensor signals.
PCM LOCATION
| Application | Location |
|---|---|
| Aerostar | Under Left Instrument Panel |
| Bronco & Pickup | Behind Left Kick Panel |
| Explorer & Ranger | Behind Right Kick Panel |
| Van | Under Right Instrument Panel |
| Villager | Behind Glove Box |
NOTE:
Components are grouped into 2 categories. The first category is INPUT DEVICES, covering components which control or produce voltage signals monitored by the PCM. The second category is OUTPUT SIGNALS, covering components controlled by the PCM.