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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-685 STEP 16. Using scan tool MB991958, check data list item CAUTION To prevent damage to scan tool MB991958, always turn the (2) Disconnect hose I from the evaporative emission canister, and plug the hose. (3) Turn the ignition switch to the "ON" position. • Item 73, Fuel Tank Differential Pressure Sensor. • The fuel tank pressure reading on the scan tool should be −1.5 to 1.5 kPa (−0.443 to 0.443 inHg). (6) Connect the evaporative emission system pressure pump (Miller number 6872A) to the fuel tank filler tube by using fuel tank adapter (MLR-8382) and pressurize the fuel tank. • 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 I to the evaporative emission canister. −1.5 and 1.5 kPa ( −0.443 and 0.443 inHg)? YES : It can be assumed that this malfunction is intermittent (Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunction ). Go to Step 17. NO : Replace the PCM (Refer to ). Then go to AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 AC306778 AB HOSE I PLUG AC306661 |