| DTC P2176: | Throttle Actuator Control System Idle Position Not Learned |
| 1. | Turn the ignition switch ON (II). |
| 2. | Do the DTC CLEAR in the CLEAR MENU with the Honda PGM Tester or the HDS. |
| 3. | Turn the ignition switch OFF. |
| 4. | Turn the ignition switch ON (II) and wait 10 seconds. |
| 5. | Check for Temporary DTCs or DTCs in the DTCs MENU with the Honda PGM Tester or the HDS. Is DTC P2176 indicated? YES - Go to 6. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the throttle body and at the throttle actuator control module, then do the throttle body cleaning.n |
| 6. | Turn the ignition switch OFF. |
| 7. | Disconnect the intake air duct from the throttle body. |
| 8. | Turn the ignition switch ON (II). |
| 9. | Do the DTC CLEAR in the CLEAR MENU with the Honda PGM Tester or the HDS. |
| 10. | Do the TAC TEST in the INSPECTION MENU with the Honda PGM Tester or the HDS. |
| 11. | Visually check the throttle valve operation. NOTE: Be careful not to pinch a finger during work. Keep hands away from the throttle valve. Does the throttle valve operate to the full close position? YES - Go to 12. NO - Go to 13. |
| 12. | Check for sludge or carbon on the throttle valve. Is there sludge or carbon on the throttle valve? YES - Do the throttle body cleaning, then go to 21 and recheck. NO - Go to 19. |
| 13. | Turn the ignition switch OFF. |
| 14. | Disconnect the throttle body 6P connector. |
| 15. | Disconnect the throttle actuator control module 16P connector. |
| 16. | Connect the throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire. |
| 17. | 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, then go to 20 and recheck. If DTC P2176 is not indicated, replace the original throttle actuator control module, then go to 20. NO - Repair open in the wires between the throttle body and the throttle actuator control module (motor drive lines), then go to 20. |
| 18. | Turn the ignition switch OFF. |
| 19. | Replace the throttle body. |
| 20. | Turn the ignition switch ON (II). |
| 21. | Do the ECM/PCM RESET in the CLEAR MENU with the Honda PGM Tester or the HDS. |
| 22. | Do the ECM/PCM idle learn procedure. |
| 23. | Turn the ignition switch OFF. |
| 24. | Turn the ignition switch ON (II) and wait 10 seconds. |
| 25. | Check for Temporary DTCs or DTCs in the DTCs MENU with the Honda PGM Tester or the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2176 is indicated, check for poor connections or loose terminals at the throttle body and the throttle actuator control module, then do the throttle body cleaning, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC troubleshooting. NO - Troubleshooting is complete.n |