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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-685 DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A STEP 1. Check harness connector C-123 at accelerator YES : Go to Step 2. Connector Inspection . Then go to Step 4. STEP 2. Check the continuity at accelerator pedal position harness side. (2) Measure the continuity between terminal No. 5 and ground. • Should be less than 2 ohms. Q: Does continuity exist? YES : Go to Step 3. STEP 3. Using scan tool MB991958, check data list item 12: CAUTION To prevent damage to scan tool MB991958, always turn the 12, Accelerator Pedal Position Sensor (sub). • Output voltage is between 0.4 and 0.6 volts when foot is released from accelerator pedal. • Output voltage is 2.0 volts or higher when accelerator pedal is fully depressed. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 4. go to Step 4. AK700284 1 6 5 4 3 2 AB C-123 harness AK700568AB MB991824 MB991827 MB991910 Data link |