|
|
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-577 STEP 3. Replace the throttle body assembly. Diagnostic Function − OBD-II Drive Cycle − Pattern 18 (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 or GROUP 42C, Diagnosis − ID Codes Registration Judgment Table <Vehicles with NO : The inspection is complete. STEP 4. Test the OBD-II drive cycle. Diagnostic Function − OBD-II Drive Cycle − Pattern 18 (2) Check the diagnostic trouble code (DTC). YES : Retry the troubleshooting. DTC P0507: Idle Control Sytem RPM Higher Than Expected . TECHNICAL DESCRIPTION • The amount of air taken in during idling is regu- lated by the opening and closing of the throttle • The ECM checks the difference between the actual engine speed and the target engine speed. . DESCRIPTIONS OF MONITOR METHODS Difference between actual and target idle speed is . MONITOR EXECUTION Continuous . MONITOR EXECUTION CONDITIONS Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Misfire monitor • Exhaust gas recirculation (EGR) system monitor • Fuel system monitor Sensor (The sensor below is determined to be normal) • Mass airflow sensor • Engine coolant temperature sensor • Intake air temperature sensor • Barometric pressure sensor • Throttle position sensor . |