DTC Troubleshooting

DTC Troubleshooting: P2118

DTC P2118: Throttle Actuator Current Range/Performance Problem

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

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

2. Clear the DTC with the HDS.

3. Slowly press the accelerator pedal to the floor.

4. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P2118 indicated?
YES - Go to step 5.

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


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

6. Disconnect the C251 connector (13P) between the PCM subharness and the throttle actuator control module subharness.

7. Measure the resistance between C251 connector (13P) terminals No. 6 and No. 13.

Is there about 1.0 Ohms or less?
YES - Go to step 8.

NO - Go to step 10.






8. Disconnect the throttle body 6P connector.

9. Measure the resistance between throttle body 6P connector terminals No. 5 and No. 6 with the throttle fully closed.

Is there about 1.0 Ohms or less?
YES - Go to step 12.

NO - Repair short in the wires between the throttle body and the C251 connector (motor drive lines), then go to step 13.






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

11. Check for continuity between body ground and C251 connector (13P) terminals No. 6 and No. 13 individually.

Is there continuity?
YES - Repair short in the wires between the throttle actuator control module and the C251 connector (motor drive lines), then go to step 8.

NO - Go to step 21.






12. Replace the throttle body. Removal and Replacement

13. Reconnect all connectors.

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

15. Reset the PCM with the HDS.

16. Do the PCM idle learn procedure. PCM Idle Learn Procedure

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

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

19. Slowly press the accelerator pedal to the floor.

20. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P2118 indicated?
YES - Check for poor connections or loose terminals at the throttle body and the throttle actuator control module, then go to step 1.

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


21. Reconnect all connectors.

22. Update the PCM if it does not have the latest software, PCM Update or substitute a known-good PCM. Reading and Clearing Diagnostic Trouble Codes

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

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

25. Slowly press the accelerator pedal to the floor.

26. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P2118 indicated?
YES - Check for poor connections or loose terminals at the throttle body and the throttle actuator control module. If the PCM was updated, substitute a known-good PCM, Reading and Clearing Diagnostic Trouble Codes 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.