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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-461 STEP 1. Using scan tool MB991958, check data list item 52: CAUTION To prevent damage to scan tool MB991958, always turn the (2) Plug the disconnected end of hose E. 52, Fuel Tank Differential Pressure Sensor. • Output voltage should be between 1,500 to 3,500 mV. (6) Connect the evaporative emission system pressure pump (Miller number 6872A) to the fuel tank filler tube by using • The fuel tank pressure reading should increase. (7) Turn the ignition switch to the "LOCK" (OFF) position. Then disconnect scan tool MB991958. (8) Remove the evaporative emission system pressure pump (Miller number 6872A) and the fuel tank adapter (9) Connect hose E to the evaporative emission canister. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting / Intermittent Malfunctions . NO : Go to Step 2 . AC608435 Data link connector MB991827 MB991824 MB991910 AB AK704692 AB Plug Hose E AK704700 |