P0657

1UR-FE ENGINE CONTROL: SFI SYSTEM: P0657: Actuator Supply Voltage Circuit / Open
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 usually is 0 V when the engine switch is turned off. If the output voltage is higher than 7 V when the engine switch is turned off, the ECM will illuminate the MIL and store a DTC when the engine switch is turned on (IG).





MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the engine switch on (IG) 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 engine 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 engine switch on (IG).

10. Wait 10 seconds or more.

11. Turn the engine switch off.

12. Wait 15 seconds or more.

13. Connect the Techstream to the DLC3.

14. Turn the engine 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.

HINT
- 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.





HINT
- 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 Reading and Clearing Diagnostic Trouble Codes.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the Techstream off.

(f) Turn the engine switch off.

(g) Disconnect the Techstream.

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

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

(j) Turn the engine switch on (IG).

(k) Wait 10 seconds or more.

(l) Turn the engine switch off.

(m) Wait 15 seconds or more.

(n) Connect the Techstream to the DLC3.

(o) Turn the engine switch on (IG) and turn the Techstream on.

(p) Wait 5 seconds or more.

(q) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(r) Check for DTCs.

OK:

P0657 is not output.

NG -- REPLACE ECM Removal

OK -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems