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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L> 13A-137 STEP 1. Using scan tool MB991502, check data list item 59: CAUTION To prevent damage to scan tool MB991502, always turn the 59, Heated Oxygen Sensor (rear). (4) Warm up the engine. • After increasing the output voltage 0.15 volts or more by (5) 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 heated oxygen sensor (rear). Then go to Step 2. STEP 2. Test the OBD-II drive cycle. Procedure 6 − Other Monitor( (2) Check the diagnostic trouble code (DTC). Q: Is the DTC P0139 is output? YES : Retry the troubleshooting. AC003081 AB 16 PIN MB991502 |