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DTC P2118: Throttle Actuator Current Range/Performance Problem Acura TL IV facelift

Engine Control Systems 7 illustrations ~762 words

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

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Scheme 50: DTC P2118: Throttle Actuator Current Range/Performance Problem
Scheme 50: DTC P2118: Throttle Actuator Current Range/Performance Problem

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Scheme 51
Scheme 51

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Scheme 52
Scheme 52

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Scheme 53

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Scheme 54
Scheme 54

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Scheme 56
Scheme 56
  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. 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 ECM/PCM.
  5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  6. Jump the SCS line with the HDS.
  7. Disconnect the throttle body 6P connector.
  8. Disconnect ECM/PCM connector B (49P).
  9. Check for continuity between ECM/PCM connector terminal B33 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 (B33), then go to step 18 .
  10. Disconnect ECM/PCM connector C (49P).
  11. 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 18 . NO - Go to step 12.
  12. 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 the throttle body 6P connector and body ground, then go to step 18 . NO - Go to step 13.
  13. 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 14. NO - Go to step 17 .
  14. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
  15. Check for continuity between ECM/PCM connector terminals C2 and C3. Is there continuity? YES - Go to step 16. NO - Repair open in the wire between the throttle body and the ECM/PCM (C2, C3), then go to step 18 .
  16. 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 17. NO - Go to step 26 .
  17. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-512345-S22857250882012103100000) ).
  18. Reconnect all connectors.
  19. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  20. Reset the ECM/PCM with the HDS.
  21. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-512362-S04299387872012103100000) ).
  22. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  23. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  24. Slowly press the accelerator pedal to the floor.
  25. 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 ECM/PCM, 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.
  26. Reconnect all connectors.
  27. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-512332-S15795428962012103100000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-512356-S00793962012012103100000) ).
  28. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  29. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  30. Slowly press the accelerator pedal to the floor.
  31. 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 ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-512356-S00793962012012103100000) ), 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 (see «ECM/PCM REPLACEMENT»(ref-512332-S08907075282012103100000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

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