System Description: Description

ECM constantly monitors engine speed to protect the catalyst from excessive heat load resulting from an misfire.

ECM performs smooth running control according to the following sensors and signals.

• Pressure sensor downstream of throttle valve (Engine load)
• Intake camshaft position sensor (Intake camshaft position)
• Exhaust camshaft position sensor (Exhaust camshaft position)
• Engine coolant temperature sensor
• Accelerator pedal position sensor (Accelerator pedal position)
• Crankshaft position sensor (Engine speeds)
• ABS actuator and electric unit (control unit) (Each wheel speed signal)

The smooth running control has functions as follows.

• Misfire detecting function
• Misfire counting function
• Factors of smooth running control