DTC Troubleshooting

DTC Troubleshooting: P2176

DTC P2176: Throttle Actuator Control System Idle Position Not Learned

CAUTION
Do not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II) or while the ignition switch is ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Initial Inspection and Diagnostic Overview

- If DTC P2135 is stored at the same time as DTC P2176, troubleshoot DTC P2135 first, then recheck for DTC P2176.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0).

4. Turn the ignition switch to ON (II), and wait 10 seconds.

5. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2176 indicated?
YES - Go to step 6.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the throttle actuator control module, then clean the throttle body. Procedures


6. Turn the ignition switch to LOCK (0).

7. Disconnect the intake air duct from the throttle body. Removal and Replacement

8. Turn the ignition switch to ON (II).

9. Clear the DTC with the HDS.

10. Visually check the throttle valve operation while doing the ETCS TEST in the INSPECTION MENU with the HDS.

Does the throttle valve move to its fully closed position?
YES - Go to step 11.

NO - Go to step 12.


11. Check for sludge or carbon on the throttle valve.

Is there sludge or carbon on the throttle valve?
YES - Clean the throttle body, Procedures then go to step 20 and recheck.

NO - Go to step 19.


12. Turn the ignition switch to LOCK (0).

13. Disconnect the throttle body 6P connector.

14. Disconnect the throttle actuator control module 16P connector. Service and Repair

15. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.






16. Check for continuity between throttle actuator control module 16P connector terminals No. 1 and No. 8.

Is there continuity?
YES - Substitute a known-good throttle actuator control module, Service and Repair then go to step 19 and recheck. If DTC P2176 is not indicated, replace the original throttle actuator control module, Service and Repair then go to step 19.

NO - Repair open in the wires between the throttle body and the throttle actuator control module (motor drive lines), then go to step 19.






17. Turn the ignition switch to LOCK (0).

18. Replace the throttle body. Removal and Replacement

19. Reconnect all connectors.

20. Turn the ignition switch to ON (II).

21. Reset the ECM with the HDS.

22. Do the ECM idle learn procedure. ECM Idle Learn Procedure

23. Turn the ignition switch to LOCK (0).

24. Turn the ignition switch to ON (II), and wait 10 seconds.

25. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2176 indicated?
YES - Check for poor connections or loose terminals at the throttle body and the throttle actuator control module. Clean the throttle body, Procedures then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.