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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-608 DIAGNOSIS Required Special Tools: • Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A • MD998478: Test Harness (3pin, triangle) • MB991923: Power Plant ECU Check Harness STEP 1. Using scan tool MB991958, check data list item 22: CAUTION To prevent damage to scan tool MB991958, always turn the 22, Crankshaft Position Sensor. • The tachometer and engine speed indicated on the scan tool should match. (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 |