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Home >> Acura >> 2003 >> MDX Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Performance System Self-Diagnostics >> Diagnostic Tests >> DTC P2101: Throttle Actuator System Malfunction

DTC P2101: Throttle Actuator System Malfunction

CAUTION: When substituting or replacement of PCM is recommended, see PCM REMOVAL & REPLACEMENT  for important precautions.
NOTE: Turn ignition on. Using Honda PGM Tester or the HDS, record the following freeze frame data:
  • Engine speed.
  • Vehicle speed.
  • Accelerator position.
  1. Using Honda PGM Tester or the HDS, do the DTC CLEAR in the CLEAR menu.
  2. Using Honda PGM Tester or the HDS, do the TAC TEST in the INSPECTION menu.
  3. Check for Temporary DTCs or DTCs in the DTC menu. If DTC P2101 is set, go to step  5 . If DTC P2101 is not set, go to next step.
  4. Test drive vehicle for several minutes in the range of recorded freeze frame data. Check for Temporary DTCs or DTCs in the DTC menu. If DTC P2101 is set, go to step  5 . If DTC P2101 is not set, problem is intermittent. System is OK at this time. Check for poor connections or loose terminals at throttle actuator control module and PCM, then clean throttle body. Remove throttle body for cleaning. Be careful not to pinch fingers. See Figure . Wipe off carbon deposits on throttle valve and inside throttle bore with a paper towel soaked in carburetor cleaner. Install throttle body. Go to step  8 .
  5. Turn ignition off. Disconnect air intake duct from throttle body. Turn ignition on. Using Honda PGM Tester or the HDS, do the DTC CLEAR in the CLEAR menu. Do the TAC TEST in the INSPECTION menu.
  6. Watch throttle valve movement. If throttle valve moves smoothly, go to step  10 . If throttle valve does not move smoothly, then clean throttle body. Remove throttle body for cleaning. Be careful not to pinch fingers. See Figure . Wipe off carbon deposits on throttle valve and inside throttle bore with a paper towel soaked in carburetor cleaner. Install throttle body. Then recheck for Temporary DTCs or DTCs in the DTC menu. If DTC P2101 is set, go to next step.
  7. Turn ignition off. Replace throttle body. Go to next step.
  8. Turn ignition on. Using Honda PGM Tester or the HDS, do the PCM RESET in the CLEAR menu. Do the PCM idle learn procedure. See PCM IDLE LEARN PROCEDURE  . Go to next step.
  9. Test drive vehicle for several minutes in the range of recorded freeze frame data. Check for Temporary DTCs or DTCs in the DTC menu. If DTC P2101 is set, check for poor connections or loose terminals at throttle actuator control module and PCM Go to step  1 . If any other Temporary DTCs or DTCs are set, troubleshoot those indicated. If DTC P2101 is not set, troubleshooting is complete.
  10. Update the PCM if it does not have the latest software, or substitute a known-good PCM. Do the PCM idle learn procedure. See PCM IDLE LEARN PROCEDURE  . Check for Temporary DTCs or DTCs in the DTC menu. If DTC P2101, check for poor connections or loose terminals at throttle actuator control module and PCM harness connector. Go to step  1 . If any other Temporary DTCs or DTCs are set, troubleshoot those indicated. If there are no Temporary DTCs or DTCs set, PCM was updated, troubleshooting is complete. If PCM was substituted, replace original PCM.
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