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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-779 DIAGNOSIS Required Special Tools: • MB991958: Scan tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991911: Main Harness B STEP 1. Using scan tool MB991958, check data list item 77: CAUTION To prevent damage to scan tool MB991958, always turn the 77, Accelerator Pedal Position Sensor (sub). • Output voltage is between 0.905 and 1.165 volts when foot is released from accelerator pedal. • Output voltage is 4.035 volts or higher when accelerator pedal is fully depressed. (4) 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 NO : Go to Step 2. STEP 2. Check connector D-138 at accelerator pedal YES : Go to Step 3. Connector Inspection . Then go to Step 8. AK302970 AB MB991911 MB991824 MB991827 AK200945 3 4 5 1 2 8 6 7 AB CONNECTOR: D-138 HARNESS D-138(GR) |