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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-485 DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A • MB991658: Test Harness • MB991923: Power Plant ECU Check Harness STEP 1. Using scan tool MB991958, check actuator test CAUTION To prevent damage to scan tool MB991958, always turn the (3) Set scan tool MB991958 to the actuator testing mode for item 02, No. 2 injector. (4) Warm up the engine to normal operating temperature: 80 °C to 95 °C (176°F to 203°F). • The idle should become slightly rougher. (5) 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 NO : Go to Step 2. STEP 2. Check the connector B-30 at No. 2 cylinder Q: Is the harness connector in good condition? YES : Go to Step 3. Connector Inspection . Then go to Step 10. AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 AK303103 M 1 2 CONNECTOR: B-30 B-30 (GR) HARNESS CONNECTOR: AB |