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Home >> Acura >> 2004 >> TL Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Electronic Throttle Control System >> DTC Troubleshooting >> DTC P2101: Throttle Actuator System Malfunction
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DTC P2101: Throttle Actuator System Malfunction

CAUTION: Do not insert your fingers into the installed throttle body when you turn the ignition switch ON (II) or while the ignition switch is ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  1. Clear the DTC with the HDS.
  2. Do the ETCS TEST in the INSPECTION MENU with the HDS.
  3. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P2101 indicated? 

    1. YES  - Go to step  6.
    2. NO  - Go to step  4.
  4. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
    • Engine speed
    • Vehicle speed
    • Accelerator position
  5. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P2101 indicated? 

    1. YES  - Go to step  6.
    2. NO  - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the throttle body and at the throttle actuator control module, then clean the throttle body (see THROTTLE BODY TEST ).
  6. Turn the ignition switch OFF.
  7. Disconnect the intake air duct from the throttle body.
  8. Turn the ignition switch ON (II).
  9. Clear the DTC with the HDS.
  10. Do the ETCS TEST in the INSPECTION MENU with the HDS.
  11. Visually check the throttle valve operation.
    NOTE: Be careful not to pinch your fingers during the check.

    Does the throttle valve operate smoothly? 

    1. YES  - Clean the throttle body (see THROTTLE BODY TEST ), then go to step  20 and recheck. If DTC P2101 is indicated, go to step  17.
    2. NO  - Go to step  12.
  12. Turn the ignition switch OFF.
  13. Disconnect the throttle body 6P connector.
  14. Disconnect the throttle actuator control module 16P connector.
  15. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
    Fig 1: Connecting Throttle Body 6P Connector Terminals With Jumper Wire
    G03659563Courtesy of AMERICAN HONDA MOTOR CO., INC.
  16. Check for continuity between throttle actuator control module 16P connector terminals No. 1 and No. 8.
    Fig 2: Checking Continuity Between Throttle Actuator Control Module 16P Connector Terminals
    G03659564Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Substitute a known-good throttle actuator control module (see THROTTLE ACTUATOR CONTROL MODULE REPLACEMENT ), then go to step  20 and recheck. If DTC P2101 is not indicated, (see THROTTLE ACTUATOR CONTROL MODULE REPLACEMENT  ), then go to step  20 If DTC P2101 is indicated, go to step  17.
    2. NO  - Repair open in the wires between the throttle body and the throttle actuator control module (motor drive lines), then go to step  20.
  17. Turn the ignition switch OFF.
  18. Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).
  19. Reconnect all connectors.
  20. Turn the ignition switch ON (II).
  21. Reset the ECM/PCM with the HDS.
  22. Do the ECM/PCM IDLE LEARN PROCEDURE ).
  23. Test-drive the vehicle for several minutes in the range of the recorded freeze data.
  24. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - If DTC P2101 is indicated, check for poor connections or loose terminals at the throttle body and the throttle actuator control module, then clean the throttle body (see THROTTLE BODY TEST ), and go to step  1 If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
    2. NO  - Troubleshooting is complete.
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