Electronic Throttle Control: Control: Notes
When the accelerator pedal is operated, APP sensors are driven and the accelerator pedal position is detected. The accelerator pedal position is delivered to the PCM, and the PCM drives the throttle actuator in the throttle body based on the delivered throttle pedal position to open or close the throttle valve. Throttle position is detected by the TP sensors in the throttle body and delivered to the PCM. The PCM drives the throttle actuator to control the throttle position during idling, when the VTEC system switches, when shifting, during VSA control, and based on the signals from the APP sensors when necessary.
The ECON ON mode softens throttle valve control to reduce fuel consumption when the accelerator pedal is roughly depressed. Also, throttle opening becomes slow in comparison with the ECON OFF mode. However, if the accelerator pedal is depressed more than a certain level in the ECON ON mode, control automatically becomes equivalent to the ECON OFF mode in order to ensure the acceleration.