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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 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 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.
    10. Fig 1: Checking Continuity Between PCM Connector Terminal B33 & Throttle Body 6P Connector Terminal No. 4
    G05961304Courtesy 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.

    12. Is there continuity? 

    YES  - Repair 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.

    Fig 2: Checking Continuity Between Throttle Body 6P Connector Terminals No. 5 & No. 6
    G05961305Courtesy of AMERICAN HONDA MOTOR CO., INC.
  12. Check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually.

    13. Is there continuity? 

    YES  - Repair short in the wire between throttle body 6P connector and body ground, then go to step  18

    NO  - Go to step  13.

    Fig 3: Checking Continuity Between Body Ground & Throttle Body 6P Connector Terminals No. 5 & No. 6
    G05961306Courtesy of AMERICAN HONDA MOTOR CO., INC.
  13. At the throttle body side, measure resistance between throttle body 6P connector terminals No. 5 and No. 6.

    14. Is there about 1.0 Ω or less? 

    YES  - Go to step 14.

    NO  - Go to step  17

    Fig 4: Measuring Resistance Between Throttle Body 6P Connector Terminals No. 5 & No. 6
    G05961307Courtesy of AMERICAN HONDA MOTOR CO., INC.
  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 & No. 6 With A Jumper Wire
    G05961302Courtesy of AMERICAN HONDA MOTOR CO., INC.
  15. Check for continuity between PCM connector terminals C2 and C3.
    Fig 6: Connecting Throttle Body 6P Connector Terminals No. 5 & No. 6 With Jumper Wire
    G05961303Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step  16.

    NO  - Repair 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. and No. 6 individually.

    Is there continuity? 

    YES  - Go to step 17.

    NO  - Go to step  26.

    Fig 7: Body Ground And Throttle Body 6P Connector Terminals No. And No. 6
    G00511820Courtesy of AMERICAN HONDA MOTOR CO., INC.
  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 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 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 Pending or Confirmed 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 Pending or Confirmed 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  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 ). If any other Pending or Confirmed DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. ■

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