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 ail 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 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?

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 throttle actuator control module.
Turn the ignition switch OFF.
Disconnect the intake air duct from the throttle body.
Push the throttle valve closed as shown.

Fig 1: Pushing Throttle Valve Closed
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Release the throttle valve.
Does the throttle valve return?

YES -Clean the throttle body (see THROTTLE BODY CLEANING ), then go to step 13 and recheck. If DTC 1683 is indicated, go to step 11.

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/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see ECM/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.
Is DTC P1683 indicated?

YES -Check for poor connections or loose terminals at the throttle body and the throttle actuator control module, then go to step 1.

NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the INDICATED DTCS TROUBLESHOOTING .