TYPICAL MALFUNCTION THRESHOLDS
DTC P0657 Actuator Supply Voltage Circuit / Open |
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 |
MONITOR STRATEGY
| Required sensors/Components | ECM |
| Frequency of operation | Once per driving cycle |
TYPICAL ENABLING CONDITIONS
| Throttle actuator power supply voltage | 7 V or higher |
TYPICAL MALFUNCTION THRESHOLDS
| Ignition switch | From ON to off (Temporary Fail ON) |
| Throttle actuator power supply | ON |
CONFIRMATION DRIVING PATTERN
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
- Turn the GTS off.
- Turn the ignition switch off.
- Disconnect the GTS.
- Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
- Connect the cable to the negative (-) battery terminal.
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON.
- Wait 10 seconds or more.
- Turn the ignition switch off and wait 15 seconds or more.
- Turn the ignition switch to ON and turn the GTS on.
- Wait 5 seconds or more.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read the pending DTCs.
- HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P0657.
- Check the DTC judgment result.
GTS 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
- HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- DTC judgment completed
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 (LandCruiser RM000003YMD00TX.html).
- HINT:
- Read freeze frame data using the GTS. 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.
| 1.CHECK FOR DTC |
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (LandCruiser RM000000VNG00DX.html).
Turn the GTS off.
Turn the ignition switch off.
Disconnect the GTS.
Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
Connect the cable to the negative (-) battery terminal.
Turn the ignition switch to ON.
Wait 10 seconds or more.
Turn the ignition switch off.
Wait 15 seconds or more.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Wait 5 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Check for DTCs.
- OK:
- P0657 is not output.
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| OK | ||
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