Engine Control Module (ECM)

The ECM controls all ignition system functions, and constantly adjusts the spark timing. The ECM monitors information from various sensor inputs that include the following:

• The throttle position (TP) sensor
• The engine coolant temperature (ECT) sensor
• The mass air flow (MAF) sensor
• The intake air temperature (IAT) sensor
• The vehicle speed sensor (VSS)
• The engine knock sensor (KS)
• The barometric (BARO) pressure sensor