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STEP 2. Using scan tool MB991958, read the MFI system ZC501967 AC404789 ZC5019680000 MB991824 MB991827 MB991910 Data link connector To prevent damage to scan tool MB991958, always turn the (1) Ensure that the ignition switch is at the "LOCK" (OFF) (2) Start up the personal computer. (3) Connect special tool MB991827 to special tool MB991824 (4) Connect special tool MB991910 to special tool MB991824. (5) Connect special tool MB991910 to the data link connector. (6) Turn the power switch of special tool MB991824 to the "ON" NOTE: When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a (7) Start the M.U.T.-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 (10) Turn the ignition switch to the "LOCK" (OFF) position, and Q:Is any DTC set? YES: Repair MFI system (Refer to GROUP 13Ab, Diagnostic Trouble Code Chart P.13Ab-44). Then go to Step 3. NO: Go to Step 3. STEP 3. Retest the system. Q:Does the accelerator pedal work normally? YES: The procedure is complete. NO: Return to Step 1. ENGINE CONTROL 17a-5 ENGINE CONTROL SYSTEM DIAGNOSIS |