DTC Troubleshooting
DTC P2118: Throttle Actuator Current Range/Performance ProblemNOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
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/PCM.
5. Turn the ignition switch to LOCK (0).
6. Jump the SCS line with the HDS.
7. Disconnect the throttle body 6P connector.
8. Disconnect PCM connector C (49P).
9. Check for continuity between ECM/PCM connector terminal C43 and throttle body 6P connector terminal No. 4.
Is there continuity?
YES - Go to step 10.
NO - Repair open in the wire between the throttle body and the ECM/PCM (C43), then go to step 17.
10. Check for continuity between throttle body 6P connector terminals No. 5 and No. 6.
Is there continuity?
YES - Repair short in the wires between throttle body 6P connector terminal No. 5 (ETCS- line) and No. 6 (ETCS+ line), then go to step 17.
NO - Go to step 11.
11. Check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually.
Is there continuity?
YES - Repair short in the wire between throttle body 6P connector and body ground, then go to step 17.
NO - Go to step 12.
12. At the throttle body side, measure resistance between throttle body 6P connector terminals No. 5 and No. 6 with the throttle fully closed.
Is there about 1.0 ohms - 1.0 kohms?
YES - Go to step 13.
NO - Go to step 16.
13. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
14. Check for continuity between ECM/PCM connector terminals C3 and C4.
Is there continuity?
YES - Go to step 15.
NO - Repair open in the wire between the throttle body and the ECM/PCM (C3, C4), then go to step 17.
15. At the throttle body side, check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually.
Is there continuity?
YES - Go to step 16.
NO - Go to step 25.
16. Replace the throttle body.
17. Reconnect all connectors.
18. Turn the ignition switch to ON (II).
19. Reset the ECM/PCM with the HDS.
20. Do the ECM/PCM idle learn procedure. Programming and Relearning
21. Turn the ignition switch to LOCK (0).
22. Turn the ignition switch to ON (II).
23. Slowly press the accelerator pedal to the floor.
24. 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 ECM/PCM, then go to step 1.
NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
25. Reconnect all connectors.
26. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.
27. Turn the ignition switch to LOCK (0).
28. Turn the ignition switch to ON (II).
29. Slowly press the accelerator pedal to the floor.
30. 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 ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to step 27. If the ECM/PCM was substituted, go to step 1.
NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.