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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-879 STEP 2. Using scan tool MB991958, check actuator test. Actuator Test Reference Table a. Item 08: Evaporative Emission Purge Solenoid. (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : Check the following items, and repair or replace the defective items. cables. b.Check for vacuum leaks. •Broken intake manifold gasket. •Broken or disconnected vacuum hose. •Improper operation of the PCV valve. •Broken air intake hose. c.Check the EGR valve. Then confirm that the malfunction symptom is eliminated. NO : Repair or replace it. Then confirm that the malfunction symptom is eliminated. INSPECTION PROCEDURE 14: The engine stalls when decelerating. . COMMENT • The intake air volume may be insufficient due to a defective the electronic control throttle valve sys- . TROUBLESHOOTING HINTS (The most likely • Malfunction of the electronic control throttle valve system. DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991911: Main Harness B STEP 1. Check if the battery terminal is disconnected. YES : Start the engine and let it run at idle for approximate 10 minutes after engine warm up. Then if a NO : Go to Step 2. AK302970 AB MB991911 MB991824 MB991827 |