Inspection Procedure 1: Throttle Valve Will Not Fully Open Or Close: Diagnosis

STEP 1. Check the accelerator cable adjustment.
Q: Is the accelerator cable properly adjusted?
1. YES: Go to Step 2.
2. NO: Adjust the accelerator cable (Refer to ACCELERATOR CABLE CHECK AND ADJUSTMENT ). Then go to Step 4.
STEP 2. Check the return spring of the throttle body.
Q: Is the return spring damaged or deformed?
1. YES: Replace the throttle body (Refer to THROTTLE BODY ASSEMBLY ). Then go to Step 4.
2. NO: Go to Step 3.
STEP 3. Check the throttle lever of the throttle body.
Q: Is the throttle lever damaged or deformed?
1. YES: Replace the throttle body (Refer to THROTTLE BODY ASSEMBLY ). Then go to Step 4.
2. NO: Go to Step 4.
STEP 4. Retest the system.
Q: Does the throttle valve fully open and close?
1. YES: The procedure is complete.
2. NO: Return to Step 1.