DTC P061F: Electronic Throttle Control System (ETCS) Malfunction: General Description

The electronic throttle control system (ETCS) opens and closes the throttle valve electronically. This system consists of the throttle actuator, the throttle valve, throttle position (TP) sensors A/B, accelerator pedal position (APP) sensors A/B, and the powertrain control module (PCM).

When the driver operates the acceleration pedal, the accelerator pedal position (APP) sensor indicates the actual pedal position. The acceleration pedal stepping amount is converted to a signal at the APP sensor, and the throttle valve opening degree target value is based on this amount. The throttle actuator is driven to be this target value, and the APP value must agree. The actual throttle valve opening is detected by TP sensor A, attached to the throttle body. The throttle actuator controller makes a self-diagnosis of the ROM, RAM, and A/D converter, and when the internal data is abnormal, a malfunction is detected in the throttle actuator controller and a DTC is stored.