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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-601 DTC P1244: RAM Test For All Area . TECHNICAL DESCRIPTION Monitors the computation function of the ECM peri- . DTC SET CONDITIONS Check Condition • Ignition switch is "ON" position. Judgment Criterion • All RAM data of ECM are defect. . FAIL-SAFE AND BACKUP FUNCTION • Microcomputer is reset. . TROUBLESHOOTING HINTS (The most • ECM failed. DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: V.C.I. 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, ID Code or GROUP 42C, ID Codes Registration Judgment Table <Vehicles with WCM> NO : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Cope with Intermittent Malfunctions . AC608435 Data link connector MB991827 MB991824 MB991910 AB |