Computerized Engine Controls: 4.0L

The Powertrain Control Module (PCM) controls fuel injection and ignition systems. The PCM is located under dash, behind passenger's side kick panel. The PCM maintains optimum engine performance under any operating condition by metering fuel delivery into each cylinder and adjusting ignition timing.

All system control functions are controlled by the microprocessor in the PCM, which receives information from various sensors located on and around the engine. System is equipped with a limp-home mode to permit continued engine operation in the event of certain sensor failures.