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 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 ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 RPM without load (in neutral) until the radiator fan comes on, then let it idle.
Turn the ignition switch OFF, and wait 10 seconds.
Turn the ignition switch ON (II).
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 throttle actuator control module.
Turn the ignition switch OFF.
Disconnect the intake air duct from the throttle body.
Push the throttle valve to closed as shown.
NOTE:
- Do not operate the ignition switch during the check.
- Be careful not to pinch your finger during the check.
  
  Fig 1: Pushing Throttle Valve To Closed
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
Release the throttle valve.
Does the throttle valve return?
1. YES - Clean the throttle body (see THROTTLE BODY CLEANING ), then go to step 13.
2. NO - Go to step 11.
Turn the ignition switch OFF.
Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).
Turn the ignition switch ON (II).
Reset the ECM with the HDS.
Do the ECM idle learn procedure (see ECM IDLE LEARN PROCEDURE ).
Turn the ignition switch OFF, and wait 10 seconds.
Turn the ignition switch ON (II).
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 throttle actuator control module, then 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.