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. Initial Inspection and Diagnostic Overview

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 Temporary DTCs or 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 ECM.


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

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

7. Measure the resistance between throttle actuator control module 16P connector terminals No. 1 and No. 8.

Is there about 1.0 Ohms or less?
YES - Go to step 3.

NO - Substitute a known-good throttle actuator control module, Service and Repair then go to step 11 and recheck. If DTC P2118 is not indicated, replace the original throttle actuator control module, Service and Repair then go to step 11.






8. Disconnect the throttle body 6P connector.

9. At the throttle body side, 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 10.

NO - Repair short in the wires between the throttle body and the throttle actuator control module (motor drive lines), then go to step 11.






10. Replace the throttle body. Removal and Replacement

11. Reconnect all connectors.

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

13. Reset the ECM with the HDS.

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

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

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

17. Slowly press the accelerator pedal to the floor.

18. Check for Temporary DTCs or 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 Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.