P0657
DTC P0657 Actuator Supply Voltage Circuit / OpenDESCRIPTION
DTC Detection Condition:
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage is usually 0 V when the ignition switch is turned OFF. If the output voltage is higher than 7 volts when the ignition switch is turned OFF, the ECM will illuminate the MIL and set a DTC when the ignition switch is turned ON.
Step 1:
Step 1(Continued):
INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester or Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.