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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-201 Check Condition • Ignition switch is "ON" position. Judgement Criterion • Throttle position sensor (main) output voltage should be 0.2 volt or less for 0.3 second. . OBD-II DRIVE CYCLE PATTERN None. . TROUBLESHOOTING HINTS (The most • Throttle position sensor failed. • Connector damage • Harness damage • ECM failed. DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A • MB991658: Test Harness STEP 1. Using scan tool MB991958, check data list item 13: CAUTION To prevent damage to scan tool MB991958, always turn the terminals No. 3, No. 4, No. 5, and No. 6. (6) Set scan tool MB991958 to the data reading mode for item 13, Throttle Position Sensor (main). • Output voltage should be between 0.3 and 0.7 volt when the throttle valve is fully closed with your finger. • Output voltage should be between 4.0 volts or more when the throttle valve is fully open with your finger. (7) 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 P.00-15 . NO : Go to Step 2. STEP 2. Check harness connector B-08 at the throttle YES : Go to Step 3. Inspection P.00E-2 . Then go to Step 6. AK700568AB MB991824 MB991827 MB991910 Data link |