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Home/Acura/MDX/Acura MDX II facelift (2010-2013)/Repair manual/Engine Control Systems/DTC P2118: Throttle Actuator Current Range/Performance Prob…
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DTC P2118: Throttle Actuator Current Range/Performance Problem Acura MDX II facelift

Engine Control Systems 7 illustrations ~670 words

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

Scheme 33

Scheme 33: DTC P2118: Throttle Actuator Current Range/Performance Problem
Scheme 33: DTC P2118: Throttle Actuator Current Range/Performance Problem

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Scheme 34

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Scheme 39
  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. Jump the SCS line with the HDS.
  7. Disconnect the throttle body 6P connector.
  8. Disconnect PCM connector B (49P).
  9. Check for continuity between PCM connector terminal B33 and throttle body 6P connector terminal No. 4. Is there continuity? YES -Go to step 10. NO -Repair an open in the wire between the throttle body and the PCM (B33), then go to step 18 .
  10. Disconnect PCM connector C (49P).
  11. Check for continuity between throttle body 6P connector terminals No. 5 and No. 6. Is there continuity? YES -Repair a short in the wires between throttle body 6P connector terminals 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 a 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 PCM connector terminals C2 and C3. Is there continuity? YES -Go to step 16. NO -Repair an open in the wires between the throttle body and the 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-510444-S04768306062012102300000) ).
  18. Reconnect all connectors.
  19. Turn the ignition switch to ON (II).
  20. Reset the PCM with the HDS.
  21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
  22. Turn the ignition switch to LOCK (0).
  23. Turn the ignition switch to ON (II).
  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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(ref-510432-S21235871652012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
  28. Turn the ignition switch to LOCK (0).
  29. Turn the ignition switch to ON (II).
  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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then go to step 28 . 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 (see «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

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