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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-1020 STEP 2. Check the trouble symptoms. • The malfunction indicator lamp (SERVICE ENGINE SOON or Check Engine Lamp) should illuminate imme- (2) Turn the ignition switch to the "LOCK" (OFF) position. SOON or Check Engine Lamp) illuminate? Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . NO : Replace the combination meter. INSPECTION PROCEDURE 4: The Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check . COMMENT • In cases such as the above, the cause is proba- bly that the PCM is detecting a problem in a sen- . TROUBLESHOOTING HINTS (The most • Shorted the malfunction indicator lamp (SER- VICE ENGINE SOON or Check Engine Lamp) DIAGNOSIS Required Special Tools: • Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A |