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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 137 (ELECTRONIC THROTTLE CONTROL SYSTEM)DTC TROUBLESHOOTINGDTC P1683: THROTTLE VALVE DEFAULT POSITION SPRING PERFORMANCE PROBLEM
2002 Honda Civic Si

DTC P1683: Throttle Valve Default Position Spring Performance Problem

2002 Honda Civic SiSECTION DTC P1683: Throttle Valve Default Position Spring Performance Problem
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
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.
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  4. Turn the ignition switch OFF, and wait 10 seconds.
  5. Turn the ignition switch ON (II).
  6. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P1683 indicated? 

    1. YES  - Go to step  7.
    2. NO  - Intermittent failure, 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 OFF.
  8. Disconnect the intake air duct from the throttle body.
  9. Push the throttle valve closed as shown in Fig 1.
    Fig 1: Pushing Throttle Valve Closed
    G03704417Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Release the throttle valve.

    Does the throttle valve return? 

    1. YES  - Clean the throttle body (see THROTTLE BODY CLEANING ), then go to step  12.
    2. NO  - Go to step  11.
  11. Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).
  12. Turn the ignition switch ON (II).
  13. Reset the PCM with the HDS.
  14. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
  15. Turn the ignition switch OFF, and wait 10 seconds.
  16. Turn the ignition switch ON (II).
  17. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - If DTC P1683 is indicated, check for poor connections or loose terminals at the throttle body and the PCM, then go to step  1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
    2. NO  - Troubleshooting is complete.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.