SFI SYSTEM, Diagnostic DTC:P0657

DTC Code DTC Name
P0657 Actuator Supply Voltage Circuit / Open

MONITOR 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 illuminates the MIL and stores the DTC when the power switch is turned on (IG).

DTC No. DTC Detection Condition Trouble Area
P0657 A throttle actuator power supply error (1 trip detection logic). ECM

MONITOR STRATEGY

Related DTCs P0657: Electronic throttle actuator supply voltage circuit range check
Required Sensors/Components (Main) ECM
Required Sensors/Components (Related) Throttle actuator
Frequency of Operation Once per driving cycle
Duration -
MIL Operation Immediate
Sequence of Operation None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored None
Both of the following conditions are met -
Power switch On (IG) to off
Electronic throttle actuator power supply voltage 7 V or higher

TYPICAL MALFUNCTION THRESHOLDS

Both of the following conditions are met -
Last trip condition Met
Electronic throttle actuator power supply On

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.

  2. Turn the power switch on (IG) and turn the Techstream on.

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

  4. Turn the Techstream off.

  5. Turn the power switch off.

  6. Disconnect the Techstream.

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

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

  9. Turn the power switch on (IG).

  10. Wait 10 seconds or more.

  11. Turn the power switch off.

  12. Wait 15 seconds or more.

  13. Connect the Techstream to the DLC3.

  14. Turn the power switch on (IG) and turn the Techstream on.

  15. Wait 5 seconds or more.

  16. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

  17. Read the pending DTCs.

    Tech Tips

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

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

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

  19. Input the DTC: P0657.

  20. Check the DTC judgment result.

    Techstream 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

    Tech Tips

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

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

  21. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips

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

    • If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

Note

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

Tech Tips

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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. READ OUTPUT DTC (DTC P0657)

    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Clear the DTCs Click here.

    5. Turn the power switch off.

    6. Turn the Techstream off.

    7. Disconnect the Techstream.

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

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

    10. Turn the power switch on (IG).

    11. Wait 10 seconds or more.

    12. Turn the power switch off.

    13. Wait 15 seconds or more.

    14. Connect the Techstream to the DLC3.

    15. Turn the power switch on (IG).

    16. Turn the Techstream on.

    17. Wait 5 seconds or more.

    18. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    19. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0657 is output B
    B

    REPLACE ECM Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here