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Home >> Acura >> 2014 >> TSX V6 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electronic Throttle Control System (V6) >> DTC Troubleshooting >> DTC P2118: Throttle Actuator Current Range/Performance Problem
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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 (see 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 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, then clean the throttle body (see THROTTLE BODY CLEANING ).

  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.
    Fig 1: Checking Continuity Between PCM Connector Terminal B33 And Throttle Body 6P Connector Terminal No. 4
    G06944228Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  10.

    NO  -Repair 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.
    Fig 2: Checking Continuity Between Throttle Body 6P Connector Terminals No. 5 And No. 6
    G06944229Courtesy of AMERICAN HONDA MOTOR CO., INC.

    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  25.

    NO  -Go to step  12.

  12. Check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually.
    Fig 3: Checking Continuity Between Body Ground And Throttle Body 6P Connector Terminals No. 5 And No. 6
    G06944230Courtesy of AMERICAN HONDA MOTOR CO., INC.

    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.
    Fig 4: Measuring Resistance Between Throttle Body 6P Connector Terminals No. 5 And No. 6
    G06944231Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 1.0 Ω 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.
    Fig 5: Identifying Jumper Wire Connection Between Throttle Body 6P Connector Terminals No. 5 And No. 6
    G06944232Courtesy of AMERICAN HONDA MOTOR CO., INC.
  15. Check for continuity between PCM connector terminals C2 and C3.
    Fig 6: Checking Continuity Between PCM Connector Terminals C2 And C3
    G06944233Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  16.

    NO  -Repair open in the wire 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.
    Fig 7: Checking Continuity Between Body Ground And Throttle Body 6P Connector Terminals No. 5 And No. 6
    G06944234Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  17.

    NO  -Go to step  26.

  17. Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).
  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 ).
  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 PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
  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 ), then go to step  27. 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 ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

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