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Home >> Acura >> 2011 >> TL Base >> Repair and Diagnosis >> Engine Performance >> System >> Electronic Throttle Control System >> 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), 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

    5. 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), 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 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
    G05987492Courtesy 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
    G05987493Courtesy 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 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
    G05987494Courtesy 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
    G05987495Courtesy 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: Connecting Throttle Body 6P Connector Terminals No 5 And No 6 With Jumper Wire
    G05987496Courtesy 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
    G05987497Courtesy 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
    G05987498Courtesy 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), or press the engine start/stop button to select the ON mode
  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), 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

    26. 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 ECM/PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM )
  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 PCM If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE ECM/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 ECM/PCM REPLACEMENT ) If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting

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