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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-629 DTC SET CONDITIONS Check Condition • Battery positive voltage is higher than 6.3 volts. Judgement Criterion • Throttle position sensor power voltage should be 4.1 volts or less for 0.3 second. . OBD-II DRIVE CYCLE PATTERN None. . TROUBLESHOOTING HINTS (The most • ECM failed. DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A STEP 1. Using scan tool MB991958, read the diagnostic CAUTION To prevent damage to scan tool MB991958, always turn the YES : Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, Diagnosis or GROUP 42C, Diagnosis − ID Codes Registration Judgment Table <Vehicles with NO : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . AK700568AB MB991824 MB991827 MB991910 Data link |