Advanced Diagnostics

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.




Monitor Execution, Sequence, Duration, DTC Type, OBD Status




Enable Conditions

Malfunction Threshold
One of the following conditions are detected and continues for at least 0.2 second:
- The data read from the ROM is abnormal
- The data read from the RAM is abnormal
- The A/D converter reference voltage is other than the specified value

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the PCM memory.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.