Dtc P0657 Actuator Supply Voltage Circuit / Open

Engine Hybrid System. Yaris. Ncp93, 131
1Nz-Fe Engine Control. Yaris. Ncp93, 131

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

CONFIRMATION DRIVING PATTERN

INSPECTION PROCEDURE

READ OUTPUT DTC (DTC P0657)

DTC 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 ignition switch is turned off. If the output voltage is higher than 7 V when the ignition switch is turned off, the ECM illuminates the MIL and stores the DTC when the ignition switch is turned to ON.

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

MONITOR STRATEGY


Related DTCs
P0657: ETCS Power Supply
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


Throttle actuator power supply voltage
7 V or higher

TYPICAL MALFUNCTION THRESHOLDS


Ignition switch
From ON to OFF (Temporary fail ON)
Electronic throttle actuator power supply
ON

CONFIRMATION DRIVING PATTERN

NOTICE:
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 (YARIS_NCP93 RM00000482L007X.html).
  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the Techstream off.
  5. Turn the ignition switch off.
  6. Disconnect the Techstream.
  7. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
  8. Connect the cable to the negative (-) battery terminal.
  9. Turn the ignition switch to ON.
  10. Wait 10 seconds or more.
  11. Turn the ignition switch off.
  12. Wait 15 seconds or more.
  13. Connect the Techstream to the DLC3.
  14. Turn the ignition switch to ON and turn the Techstream on.
  15. Wait 5 seconds or more.
  16. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  17. Read 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.

    Techstream 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
    N/A
    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.
  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 (YARIS_NCP93 RM000000PDK0T5X.html).
    HINT:
    1. If a permanent DTC is output, the system is malfunctioning.
    2. If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

NOTICE:
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 (YARIS_NCP93 RM00000482L007X.html).
HINT:
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.
1.READ OUTPUT DTC (DTC P0657)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Clear the DTC (YARIS_NCP93 RM000000PDK0T5X.html).

  1. Turn the ignition switch off.

  1. Turn the Techstream off.

  1. Disconnect the Techstream.

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

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

  1. Turn the ignition switch to ON.

  1. Wait 10 seconds or more.

  1. Turn the ignition switch off.

  1. Wait 15 seconds or more.

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Wait 5 seconds or more.

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

  1. Read DTCs.

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



B
REPLACE ECM (YARIS_NCP93 RM000001CN002IX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (YARIS_NCP93 RM000000PDQ0Q2X.html)