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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-197 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, read the diagnostic CAUTION To prevent damage to scan tool MB991958, always turn the YES : Refer to Diagnostic Trouble Code Chart . NO : Go to Step 2. STEP 2. Using scan tool MB991958, check data list item 13: terminals No. 3, No. 4, No. 5, and No. 6. (5) 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 4.0 volts or more when the throttle valve is fully open with your finger. (6) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 3. − Throttle Position Sensor (main) Circuit Low Input − Throttle Position Sensor (main) Circuit High Input . AK700568AB MB991824 MB991827 MB991910 Data link |