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 to OFF. If the output voltage is 7 V or more when the ignition switch is turned to OFF, the ECM will illuminate the MIL and store the DTC when the ignition switch is turned to ON.

DTC No.
DTC Detection Condition
Trouble Area
P0657
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
With in 1 second
MIL operation
Immediate
Sequence of operation
None

TYPICAL ENABLING CONDITIONS


Monitor runs whenever following DTCs not stored
None
Throttle actuator power supply voltage
7 V or more

TYPICAL MALFUNCTION THRESHOLDS


Battery voltage
8 V or more
Starter
OFF
Ignition switch
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 RM000000UYX0BYX.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 operation).
  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 for 5 seconds or more.
  16. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  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.

    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 test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (YARIS_NCP93 RM000000PDK0QGX.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 RM000000UYX0BYX.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 DTC (YARIS_NCP93 RM000000PDK0QGX.html).

  1. Turn the ignition switch off and turn the Techstream off.

  1. Disconnect the Techstream.

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

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

  1. Turn the ignition switch to ON.

  1. Wait for 10 seconds or more.

  1. Turn the ignition switch off.

  1. Wait for 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 for 5 seconds or more.

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

  1. Read DTCs.

    Result
    Display (DTC Output)
    		Proceed To
    No output
    		A
    P0657
    		B



B
REPLACE ECM (YARIS_NCP93 RM000001CN002AX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (YARIS_NCP93 RM000000PDQ0NOX.html)