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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-415 STEP 8. Check the power supply voltage at ECM harness measure at the harness side. (2) Measure the voltage between terminal 38 <M/T> or 49 <A/ T> and ground. • Voltage should be battery positive voltage. Q: Is the voltage normal? YES : Go to Step 9. 21X terminal 2 and ECM connector C-53 terminal 38 STEP 9. Check the power supply voltage at ECM harness and measure at the harness side. (2) Using a jumper wire, connect terminal 38 <M/T> or 49 <A/ T> to ground. (3) Measure the voltage between terminal (12, 25) <M/T> or (41, 47) <A/T> and ground. • Voltage should be battery positive voltage. Q: Is the voltage normal? YES : Replace the ECM or PCM. Then confirm that the malfunction symptom is eliminated. NO : Repair harness wire between MFI relay connector A- 21X terminal 1 and ECM connector C-49 terminal (12, AK000405 <M/T> C-53 HARNESS AC 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 AK000406AD 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 <A/T> C-54 HARNESS AK000407 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 <M/T> HARNESS SIDE C-49 C-53 AC AKX01438 C-54 HARNESS <A/T> 46 45 44 54 53 52 51 50 49 48 47 43 42 41 63 62 61 60 59 58 AG |