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)/press the engine start/stop button, or while the ignition switch is in ON (II)/vehicle in ON mode. 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), or press the engine start/stop button to select the ON mode.
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
4. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and wait 10 seconds.
5. Check for Pending or Confirmed 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 PCM, then clean the throttle body Procedures.�
6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
7. Disconnect the intake air duct from the throttle body.
8. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
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 21.
NO -
Go to step 18.
12. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
13. Disconnect the throttle body 6P connector.
14. Jump the SCS line with the HDS.
15. Disconnect PCM connector C (49P).
16. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
17. Check for continuity between PCM connector terminals C2 and C3.
Is there continuity?
YES -
Go to step 27.
NO -
Repair an open in the wires between the throttle body and the PCM (C2, C3), then go to step 20.
18. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
19. Replace the throttle body Removal and Replacement.
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure PCM Idle Learn Procedure.
24. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
25. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and wait 10 seconds.
26. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P2176 indicated?
YES -
Check for poor connections or loose terminals at the throttle body and the PCM, then clean the throttle body Procedures, and go to step 1.
NO -
Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�
27. Reconnect all connectors.
28. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
29. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
30. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and wait 10 seconds.
31. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P2176 indicated?
YES -
Check for poor connections or loose terminals at the throttle body and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.
NO -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�