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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-112 DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A STEP 1. Using scan tool MB991958, check data list item 13: CAUTION To prevent damage to scan tool MB991958, always turn the (3) Turn the ignition switch to the "ON" position. 13, Intake Air Temperature Sensor. (5) Heating the sensor using a hair drier. • The indicated temperature increases. NOTE: Do not allow it to increase over 80 ° C (176 ° F). (6) 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 AK302200 AB INTAKE AIR MASS AIRFLOW |