Powertrain Control Module (PCM)

Powertrain Control Module (PCM)

The engine control module (PCM) is located in the engine room. The PCM controls the following:
- Fuel control.
- Throttle valve control
- Ignition timing.
- On-board diagnostics for engine functions.
- Valve timing
- A/C clutch control
- Cruise control etc.

The PCM constantly observes the information from various sensors. The PCM controls the systems that affect vehicle performance. The PCM performs the diagnostic function of the system. It can recognize operational problems, alert the driver through the MIL (Check Engine lamp), and store diagnostic trouble codes (DTCs). DTCs identify the problem areas to aid the technician in making repairs.