INSPECTION PROCEDURE 2: Accelerator Pedal Operation Not Smooth (Over Acceleration): Diagnosis

Required Special Tools:

MB991958: Scan Tool (MUT-III sub assembly)
- MB991824: V.C.I.
- MB991827: MUT-III USB Cable
- MB991911: MUT-III Main Harness B

STEP 1. Check the accelerator pedal.
Q: Is the accelerator pedal loose?

YES: Tighten, then go to Step 4.

NO: Go to Step 2.
STEP 2. Clean the throttle body (Refer to THROTTLE BODY CLEANING ).
Q: Does the accelerator pedal work normally?

YES: The procedure is complete.

NO: Go to Step 3.
STEP 3. Using scan tool MB991958, read the diagnostic trouble code (DTC).
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
4. Connect special tool MB991911 to special tool MB991824.
5. Connect special tool MB991911 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON" position.
  NOTE: When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.
7. Start the MUT-III system on the personal computer.
8. Turn the ignition switch to the "ON" position.
9. Check for MFI system diagnostic trouble code (Refer to HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODE ).
10. Turn the ignition switch to the "LOCK" (OFF) position, and then remove scan tool MB991958 in the reverse order of installation.
Q: Is any DTC set?

YES: Refer to DIAGNOSTIC TROUBLE CODE CHART .

NO: Go to Step 4.

Fig 1: Connecting Scan Tool To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 4. Retest the system.
Q: Does the accelerator pedal work normally?

YES: The procedure is complete.

NO: Go to Step 1.