SFI SYSTEM, Diagnostic DTC:P0657

DTC Code DTC Name
P0657 Actuator Supply Voltage Circuit / Open

DESCRIPTION

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 power switch is turned off. If the output voltage is higher than 7 V when the power switch is turned off, the ECM will illuminate the MIL and set a DTC when the power switch is turned on (IG).

DTC No. DTC Detection Condition Trouble Area
P0657 Throttle actuator power supply error ECM

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. 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.

PROCEDURE


  1. CHECK DTC


    1. Clear DTC Click here.

    2. Turn the power switch off.

    3. Disconnect the cable from the battery negative (-) terminal and wait for 1 minute.

    4. Connect the cable to the battery negative (-) terminal.

    5. Turn the power switch on (IG) for 10 seconds.

    6. Turn the power switch off.

    7. Connect the intelligent tester to the DLC3.

    8. Turn the power switch on (IG).

    9. Turn the tester ON.

    10. Wait for 5 seconds or more.

    11. Enter the following menus: Powertrain / Engine and ECT / DTC.

    12. Check DTC.

      OK
      P0657 is not present.

    NG

    REPLACE ECM Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here