DTC    P0657    Actuator Supply Voltage Circuit / Open

for Preparation Click here


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 will illuminate the MIL and set the DTC the next time the power switch is turned on (IG).

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

MONITOR STRATEGY


Required sensors/Components (Main)
ECM
Frequency of operation
Once per driving cycle

TYPICAL ENABLING CONDITIONS


Power switch
On (IG) to off
Throttle actuator power supply voltage
7 V or higher

TYPICAL MALFUNCTION THRESHOLDS


Electric throttle actuator power supply
ON

CONFIRMATION DRIVING PATTERN

  1. Connect the intelligent tester to the DLC3.
  2. Turn the power switch on (IG) and turn the tester on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the tester off.
  5. Turn the power switch off.
  6. Disconnect the tester.
  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 tester to the DLC3.
  14. Turn the power switch on (IG) and turn the tester on.
  15. Wait 5 seconds or more.
  16. Enter the following menus: Powertrain / Engine and ECT / DTC.
  17. Read the pending DTCs.

    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. 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.

    Tester Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    UNKNOWN
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.


INSPECTION PROCEDURE

NOTICE:
After turning the 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).

HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1.READ OUTPUT DTC (DTC P0657)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the tester on.

  1. Clear the DTCs (Click here).

  1. Turn the tester off.

  1. Turn the power switch off.

  1. Disconnect the tester.

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

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

  1. Turn the power switch on (IG).

  1. Wait 10 seconds or more.

  1. Turn the power switch off.

  1. Wait 15 seconds or more.

  1. Connect the tester to the DLC3.

  1. Turn the power switch on (IG) and turn the tester on.

  1. Wait 15 seconds or more.

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

  1. 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)