Inspection Procedure 1: Throttle Valve will not Fully Open or Close: Diagnosis

STEP 1. Using scan tool (M.U.T.-III), read the MFI system diagnostic trouble code.
CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
1. Connect scan tool (M.U.T.-III) to the data link connector (Refer to MFI DIAGNOSIS - DIAGNOSTIC FUNCTION ).
2. Turn the ignition switch to the "ON" position.
3. Check for MFI system diagnostic trouble code (Refer to DIAGNOSTIC FUNCTION - HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES ) < 2.4L Engine > or (Refer to DIAGNOSTIC FUNCTION - HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES ) < 3.0L Engine >.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is any DTC stored?
1. YES: Repair MFI system (Refer to DIAGNOSTIC TROUBLE CODE CHART ) < 2.4L Engine > or (Refer to DIAGNOSTIC TROUBLE CODE CHART ) < 3.0L Engine >. Then go to Step 2.
2. NO: Go to Step 2.
STEP 2. Retest the system.
Q: Does the throttle valve fully open and close?
1. YES: The procedure is complete.
2. NO: Return to Step 1.