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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-289 STEP 1. Using scan tool MB991958, check data list item 53: CAUTION To prevent damage to scan tool MB991958, always turn the 53, Fuel Tank Temperature Sensor. • Approximately the same as the ambient air temperature when the engine is cooled. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Cope with Intermittent Malfunctions . NO : Go to Step 2. STEP 2. Check harness connector D-22 at the fuel tank YES : Go to Step 3. Connector Inspection . Then go to Step 6. STEP 3. Check the fuel tank temperature sensor. D-22. (2) Measure the resistance between terminal No. 1 and No. 3 of the fuel tank temperature sensor. Standard value: 0.5 − 12.0 kΩ Q: Is the measured resistance between 0.5 and 12.0 kΩ? YES : Go to Step 4. Step 6. AC608435 Data link connector MB991827 MB991824 MB991910 AB 1 2 3 4 5 AK203165 Fuel tank temperature AC |