Engine Control Module (ECM)

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

• Throttle position sensor
• Engine coolant temperature (ECT) sensor
• Mass air flow (MAF) sensors
• Intake air temperature (IAT) sensors
• Vehicle speed sensor (VSS)
• Transmission gear position or range information sensors
• Engine knock sensors
• Ambient pressure sensors (BARO)