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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-625 STEP 3. Replace the heated oxygen sensor (rear). Diagnostic Function − OBD-II Drive Cycle − Pattern 1 (3) Check the diagnostic trouble code (DTC). YES : Go to Step 4. STEP 4. Replace the injector. Diagnostic Function − OBD-II Drive Cycle − Pattern 1 (3) Check the diagnostic trouble code (DTC). YES : Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, Diagnosis <Vehicles with KOS> or GROUP 42C, Diagnosis − ID Codes Registration Judgment Table <Vehicles with WCM> NO : The inspection is complete. DTC P2097: Post Catalyst Fuel Trim System too Rich . TECHNICAL DESCRIPTION • The ECM effects air/fuel ratio feedback control in accordance with the signals from the heated oxy- • If the heated oxygen sensor (front) has deterio- rated, corrections will be made by the heated . DESCRIPTIONS OF MONITOR METHODS • When an abnormality exists in the heated oxygen sensor (front), the amount of compensated fuel • If an abnormality exists in the heated oxygen sen- sor (rear), also it is judged to be faulty even . MONITOR EXECUTION Continuous . MONITOR EXECUTION CONDITIONS Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Heated oxygen sensor (front) monitor Sensor (The sensor below is determined to be normal) • Mass airflow sensor . |