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.

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 Park or 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 PCM.
Turn the ignition switch OFF.
Disconnect the intake air duct from the throttle body.
Push the throttle valve closed as shown in Fig 1.

Fig 1: Pushing Throttle Valve 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 12.
2. NO - Go to step 11.
Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).
Turn the ignition switch ON (II).
Reset the PCM with the HDS.
Do the PCM idle learn procedure (see PCM 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 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.