DTC Troubleshooting

DTC P2101: ETCS Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Do the ETCS TEST in the INSPECTION MENU with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2101 indicated?

YES - Go to step 7.

NO - Go to step 5.

5. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
- ENGINE SPEED
- VSS
- APP SENSOR A

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

Is DTC P2101 indicated?

YES - Go to step 7.

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

7. Turn the ignition switch OFF.
8. Disconnect the intake air duct from the throttle body.
9. Turn the ignition switch ON (II).
10. Clear the DTC with the HDS.
11. Do the ETCS TEST in the INSPECTION MENU with the HDS.
12. Visually check the throttle valve operation.

Does the throttle valve operate smoothly?

YES - Clean the throttle body, then go to step 21 and recheck. If DTC P2101 is indicated, go to step 19.

NO - Go to step 13.

13. Turn the ignition switch OFF.
14. Disconnect the throttle body 6P connector.
15. Jump the SCS line with the HDS.
16. Disconnect PCM connector C (49P).




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




18. Check for continuity between PCM connector terminals C2 and C3.

Is there continuity?

YES - Go to step 26.

NO - Repair open in the wires between the throttle body and the PCM (C2, C3), then go to step 20.

19. Turn the ignition switch OFF.
20. Replace the throttle body.
21. Turn the ignition switch ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure.
24. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
- ENGINE SPEED
- VSS
- APP SENSOR A

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

Is DTC P2101 indicated?

YES - Check for poor connections or loose terminals at the throttle body and the PCM, then clean the throttle body, and go to step 1.

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

26. Reconnect all connectors.
27. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
28. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2101 indicated?

YES - Check for poor connections or loose terminals at the throttle body and the PCM, then clean the throttle body. 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. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.