Powertrain Control Module: Notes

The Powertrain Control Module (PCM), located under the instrument panel on passenger side, is control center of fuel injection system. It constantly monitors information from various sensors, and controls systems that affect vehicle performance. For service, PCM has two parts: Controller (PCM without MEM-CAL) and Memory-Calibration Unit (MEM-CAL).

Fig 1: Powertrain Control Module (PCM)

Courtesy of GENERAL MOTORS CORP.