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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-777 STEP 10. Measure the power supply voltage at ECM side. (2) Turn the ignition switch to the "ON" position. • Voltage should be battery positive voltage. (4) Turn the ignition switch to the "LOCK" (OFF) position. present? STEP 11. Check for open circuit and short circuit to ground Then check that the malfunction is eliminated. YES : Go to Step 12. symptom is eliminated. STEP 12. Check harness connector A-34X at MFI relay for YES : Repair harness wire between fuel pump relay 1 connector (terminal No. 2) and MFI relay connector NO : Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection . Then confirm that the malfunction symptom is eliminated. AK704358 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 AB B-09 harness |