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СИСТЕМА SFI, Diagnostic DTC:P0657

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DTC Code DTC Name
P0657 Actuator Supply Voltage Circuit / Open
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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 ignition switch is turned off. If the output voltage is higher than 7 V when the ignition switch is turned off, the ECM will illuminate the MIL and store a DTC when the ignition switch is turned to ON.

DTC No. DTC Detection Condition Trouble Area
P0657 There is a throttle actuator power supply error (1 trip detection logic). ECM
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MONITOR STRATEGY

Required sensors/Components ECM
Frequency of operation Once per driving cycle
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TYPICAL ENABLING CONDITIONS

Throttle actuator power supply voltage 7 V or higher
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TYPICAL MALFUNCTION THRESHOLDS

Ignition switch From ON to off (Temporary Fail ON)
Throttle actuator power supply ON
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CONFIRMATION DRIVING PATTERN


  1. Connect the intelligent tester to the DLC3.

  2. Turn the ignition switch to ON and turn the intelligent tester on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

  4. Turn the intelligent tester off.

  5. Turn the ignition switch off.

  6. Disconnect the intelligent tester.

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

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

  9. Connect the intelligent tester to the DLC3.

  10. Turn the ignition switch to ON.

  11. Wait 10 seconds or more.

  12. Turn the ignition switch off and wait 15 seconds or more.

  13. Turn the ignition switch to ON and turn the intelligent tester on.

  14. Wait 5 seconds or more.

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

  16. Read the pending DTCs.

    Tip:

    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  17. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  18. Input the DTC: P0657.

  19. Check the DTC judgment result.

    Intelligent Tester Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    Tip:

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

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INSPECTION PROCEDURE

Note:

After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work (Click here).

Tip:

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.

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PROCEDURE


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    CHECK FOR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Clear the DTCs (Click here).

    5. Turn the intelligent tester off.

    6. Turn the ignition switch off.

    7. Disconnect the intelligent tester.

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

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

    10. Turn the ignition switch to ON.

    11. Wait 10 seconds or more.

    12. Turn the ignition switch off.

    13. Wait 15 seconds or more.

    14. Connect the intelligent tester to the DLC3.

    15. Turn the ignition switch to ON and turn the intelligent tester on.

    16. Wait 5 seconds or more.

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

    18. Check for DTCs.

      OK
      P0657 is not output.

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    CHECK FOR INTERMITTENT PROBLEMSClick here

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    REPLACE ECMClick here