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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-789 STEP 3. Using scan tool MB991958, check data list. CAUTION To prevent damage to scan tool MB991958, always turn the Reference Table a. Item 21: Engine Coolant Temperature Sensor. c. Item 25: Barometric pressure Sensor. d. Item 69: Right Bank Heated Oxygen Sensor (rear) f. Item 59: Left Bank Heated Oxygen Sensor (rear) g. Item 11: Left Bank Heated Oxygen Sensor (front) (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 4. symptom is eliminated. STEP 4. Using scan tool MB991958, check data list. Reference Table a. Item 39: Right Bank Heated Oxygen Sensor (front) • Voltage should fluctuate between 0 − 0.4 volt and 0.6 − 1.0 volt while idling after the engine has been warmed. (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : Replace the heated oxygen sensor (front). Then confirm that the malfunction symptom is eliminated. If NO : Go to Step 5. AK303629AB MB991911 MB991827 MB991824 16-PIN AK303629AB MB991911 MB991827 MB991824 16-PIN |