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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-508 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 item 03, No. 3 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 − How to Cope with Intermittent Malfunctions NO : Go to Step 2. STEP 2. Check harness connector B-32 at intermediate YES : Go to Step 3. . Then go to Step 12. AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 AK303053 3 4 5 8 9 1 2 6 7 10 CONNECTOR: B-32 HARNESS CONNECTOR: AB B-32 (B) |