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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-71 STEP 4. Using scan tool MB991502, check data list item 21: CAUTION To prevent damage to scan tool MB991502, always turn the 21, Engine Coolant Temperature Sensor. • The engine coolant temperature and temperature (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 14. STEP 5. Check connector B-11 at engine coolant YES : Go to Step 6. Connector Inspection ( ). Then go to Step 14. STEP 6. Check the sensor supply voltage at engine side. (2) Turn the ignition switch to the "ON" position. • Voltage should be between 4.5 and 4.9 volts (4) Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the voltage normal? YES : Go to Step 8. AKX01177 16 PIN MB991502 AB ACX02478 AD ENGINE COOLANT CONNECTOR : B-11 AK000234 B-11 HARNESS 2 1 AB |