Engine Control System - SFI System (from 12/2010)

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0657: Actuator Supply Voltage Circuit / Open
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 Volts when the ignition switch is turned off, the ECM will illuminate the MIL and set the DTC when the ignition switch is turned to ON.





MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN





1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) DTC Check / Clear (from 12/2010).

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

5. Wait for 30 seconds.

6. Turn the ignition switch to ON and turn the Techstream on.

7. Wait 5 seconds or more [A].

8. Enter the following menus: Powertrain / Engine / Trouble Codes.

9. Read the DTCs [B].

10. If a DTC is output, the system is malfunctioning.

HINT
If a DTC is not output, perform the following procedure.

11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

12. Input the DTC: P0657.

13. Check the DTC judgment result.





HINT
* If the judgment result shows ABNORMAL, the system has a malfunction.
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [A] again.

14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

15. Check the judgment result.

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

16. If the test result is INCOMPLETE or UNKNOWN and no DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear (from 12/2010).

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

INSPECTION PROCEDURE

HINT
Read freeze frame data using 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 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 Freeze Frame Data.

PROCEDURE

1. READ OUTPUT DTC (DTC P0657)

(a) Connect Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs DTC Check / Clear (from 12/2010).

(e) Turn the ignition switch off and turn the Techstream off.

(f) Disconnect the Techstream.

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

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

(i) Turn the ignition switch to ON for 10 seconds.

(j) Turn the ignition switch off.

(k) Turn the ignition switch to ON.

(l) Wait 5 seconds or more.

(m) Connect the Techstream to the DLC3.

(n) Turn the Techstream on.

(o) Select the following menu items: Powertrain / Engine / Trouble Codes.

(p) Read the DTCs.

Result:





B -- REPLACE ECM Removal (from 12/2010)

A -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems