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Home >> Acura >> 2013 >> ZDX >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electronic Throttle Control System >> DTC Troubleshooting >> DTC P1683: Throttle Valve Default Position Spring Performance Problem
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DTC P1683: Throttle Valve Default Position Spring Performance Problem

CAUTION: Do not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II)/press the engine start/stop button, or while the ignition switch is in ON (II)/vehicle in ON mode. 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. 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. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
  4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, and wait 10 seconds.
  5. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  6. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P1683 indicated? 

    YES  -Go to step 7.

    NO  -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the PCM.

  7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  8. Disconnect the intake air duct from the throttle body.
  9. Push the throttle valve closed as shown in illustration.
    Fig 1: Pushing Throttle Valve (Closed)
    G08072836Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Release the throttle valve.

    Does the throttle valve return? 

    YES  -Clean the throttle body (see THROTTLE BODY CLEANING  ), then go to step  12 and recheck. If DTC P1683 is still indicated, go to step 11.

    NO  -Go to step 11.

  11. Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION  ).
  12. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  13. Reset the PCM with the HDS.
  14. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
  15. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, and wait 10 seconds.
  16. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  17. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P1683 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 .

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