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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-509 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • Battery positive voltage is between 11 and 16.5 volts. • 2 seconds or more have passed since the engine staring sequence was completed. Judgement Criterion • Fuel level sensor resistance has continued to be 2 ohms or lower for 2 seconds. . FAIL-SAFE AND BACKUP FUNCTION • None . OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function − OBD-II Drive Cycle − . . TROUBLESHOOTING HINTS (The most • Fuel level sensor failed. DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: V.C.I. AK604342 Good Malfunction End No No No No Fuel level sensor resistance <= 2 ohms Fuel level sensor resistance >= 186 ohms Start Continuous failure for 2secs Monitoring Yes Yes Yes Yes |