System Description

ECM stabilizes idle speeds to protect the engine, drivetrain, and vehicle and limits engine speeds.

ECM controls engine speeds according to the following sensors and signals.

• Crankshaft position sensor (Engine speeds)
• Throttle position sensor 1 and 2 (Throttle valve position)
• TCM (Shift position)
• Electronic stability program control unit (Each wheel speed)

In addition, conditions for the following control items and functions are added:

• Throttle control
• Ignition timing control
• Fuel shut-off function
• Adaptation of the injection time of the fuel injectors (Idle speeds control)

The ENGINE SPEEDS CONTROL has functions and control items as follows.

• Malfunction in throttle valve actuator
• Speeds limiting function
• Maximum speed limiting function
• Configuration function
• Idle speeds control