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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L> 13A-381 • A battery positive voltage is constantly supplied • The PCM (terminals 42, 48) is grounded to the TROUBLESHOOTING HINTS (The most likely )) ) • Malfunction of the ignition switch. • Malfunction of the MFI relay. • Improper connector contact, open circuit or short- • Disconnected PCM ground wire. • Malfunction of the PCM. DIAGNOSIS STEP 1. Check connector A-21X at MFI relay for damage. YES : Go to Step 2. Connector Inspection( ). Then confirm that the malfunction symptom is eliminated. AK000555AB CONNECTOR : A-21X MFI RELAY |