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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-195 STEP 4. Check connector A-21X at the MFI relay for YES : Repair harness wire between MFI relay connector A- 21X terminal 1 and left bank heated oxygen sensor NO : Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection ( ). Then go to Step 12. STEP 5. Check the power supply voltage at ECM connector T>. (2) Turn the ignition switch to the "ON" position. backprobing. • Voltage should be battery positive voltage. (4) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the voltage normal? YES : Go to Step 8. STEP 6. Check connector C-51 at ECM <M/T> or connector YES : Go to Step 7. Connector Inspection ( ). Then go to Step 12. AK000226 AK000226AB CONNECTOR : A-21X MFI RELAY AKX01543 AKX01543 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 C-51<M/T>, C-52<A/T> AF 9 AK000225 CONNECTOR : C-51<M/T>, C-52<A/T> C-52 C-51 PCM<A/T> ECM<M/T> AJ |