STEP 1. Check the accelerator cable adjustment.

Q: Is the accelerator cable properly adjusted?

YES:  Go to Step 2.
NO:  Adjust the accelerator cable (Refer to ). Then go to Step 5.

STEP 2. Check the accelerator pedal position sensor assembly.

Check that the lever of the accelerator pedal position sensor assembly moves smoothly by moving it by hand.

Q: Does the lever of the accelerator pedal position sensor assembly move smoothly?

YES:  Go to Step 3.
NO:  Replace the accelerator pedal position sensor assembly (Refer to ). Then go to Step 5.

STEP 3. Check the accelerator pedal position sensor assembly.

Refer to GROUP 13C, On-vehicle Service .
YES:  Go to Step 4.
NO:  Replace the accelerator pedal position sensor assembly (Refer to ). Then go to Step 5.

STEP 4. Check the Throttle valve (Throttle valve control servo).

Refer to GROUP 13C, On-vehicle Service .
YES:  Go to Step 5.
NO:  Cleaning the throttle body (Refer to GROUP 13C, On-vehicle Service ), or replace the throttle body assembly (Refer to GROUP 13C, Throttle Body ). Then go to Step 5.

STEP 5. Retest the system.

Q: Does the throttle valve fully open and close?

YES:  The procedure is complete.
NO:  Return to Step 1.