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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-183 STEP 5. Using scan tool MB991502, check data list item 59: CAUTION To prevent damage to scan tool MB991502, always turn the 59, Heated Oxygen Sensor Bank 2, Sensor 2 (left rear). • Warming up the engine. When the engine is revved, the (4) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the sensor operating properly? YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/ NO : Replace the ECM or PCM. Then go to Step 15. STEP 6. Check connector B-23 at left bank heated oxygen YES : Repair harness wire between left bank heated oxygen sensor (rear) connector B-23 terminal 4 and ECM NO : Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection ( ). Then go to Step 15. AKX01177 16 PIN MB991502 AB AK000214 AK000214AB CONNECTOR : B-23 AK000225 CONNECTOR : C-62<M/T>, C-59<A/T> C-59 C-62 PCM<A/T> ECM<M/T> AL |