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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-449 STEP 1. Using scan tool MB991502, read the diagnostic CAUTION To prevent damage to scan tool MB991502, always turn the Q: Is the DTC is output? YES : Refer to, Diagnostic Trouble Code Chart( ). NO : Go to Step 2. STEP 2. Check the ignition timing. − Ignition Timing Check ( Q: Is the ignition timing normal? YES : Go to Step 3. belt cover are in the correct position. Then confirm STEP 3. Using scan tool MB991502, check data list. CAUTION To prevent damage to scan tool MB991502, 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. Q: Are they operating properly? YES : Go to Step 4. symptom is eliminated. AC003081 AB 16 PIN MB991502 AC003081 AB 16 PIN MB991502 |