DTC P1684

DTC P1684  : Throttle Valve Return Spring Performance Problem

Do not insert your fingers into the installed throttle body when you turn the vehicle to the ON mode, or while the vehicle is in ON mode. If you do, you will seriously injure your fingers if the throttle valve is activated.

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Enter the maintenance mode, then start the engine .

   -5. Hold the engine speed at 3000 RPM without load (in P or N) until the radiator fan comes on, then let it idle.

   -6. Turn the vehicle to the OFF (LOCK) mode, and wait for 10 seconds.

   -7. Turn the vehicle to the ON mode.

   -8. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P1684 Throttle Valve Return Spring Performance Problem

   DTC (PGM-FI)

   Is DTC P1684 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

2. Throttle body condition check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Remove the air intake tube .

   -3. Push the throttle valve open as shown.

   Courtesy of HONDA, U.S.A., INC.

   -4. Release the throttle valve.

   Does the throttle valve return?

   YES 

   Clean the throttle body , and recheck. If DTC P1684 is indicated again, replace the throttle body .

   NO 

   Replace the throttle body .