The powertrain control module (PCM) is the control center of the vehicle, and controls the following items:

The PCM constantly monitors the information from various sensors, and controls the systems that effect vehicle performance. The PCM also performs the diagnostic function of the system. The PCM can recognize operational conditions, alert the driver through the malfunction indicator lamp (MIL), and store diagnostic trouble codes which identify specific areas to aid the technician in making repairs.

The type of PCM used is a PCM 32U. The knock sensor system is not a separate component. The PCM contains integrated knock sensor (KS) diagnostic circuitry. For further information, refer to Knock Sensor (KS) System Description .