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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-452 Judgement Criteria • The fuel tank temperature − engine coolant tem- perature is 15 °C (27°F) or more when the engine is started. . OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function − OBD-II Drive Cycle − Procedure 6 − Other Monitor . TROUBLESHOOTING HINTS (The most • Fuel tank temperature sensor failed. • Open or shorted fuel tank temperature sensor cir- cuit, harness damage, or connector damage. • PCM failed. NOTE: A diagnostic trouble code (DTC) could be DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A • MB991923: Power Plant ECU Check Harness STEP 1. Using scan tool MB991958, check data list item CAUTION To prevent damage to scan tool MB991958, always turn the 4A, Fuel Tank Temperature Sensor. • Approximately the same as the ambient air temperature when the engine is cooled. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . NO : Go to Step 2. AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 |