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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 ).
  • Information marked with an asterisk (*1) applies to '09-11 models.
  • Information marked with an asterisk (*2) applies to '12 model.
  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 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.
    Fig 1: Checking Continuity Between PCM Connector Terminal B33 And Throttle Body 6P Connector Terminal No. 4
    G00511708Courtesy 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. 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
    G00511709Courtesy 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  18.

    NO  -Go to step 11.

  11. 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
    G00511710Courtesy 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 12.

  12. 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
    G05964585Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 1.0-1.0 kΩ? 

    YES  -Go to step 13.

    NO  -Go to step  17.

  13. Disconnect PCM connector C (49P).
  14. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
    Fig 5: Connecting Throttle Body 6P Connector Terminals No. 5 And No. 6 With Jumper Wire
    G00511711Courtesy 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
    G00511712Courtesy 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
    G05964588Courtesy 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 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 PCM, 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. ■

  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 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 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 Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. ■

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