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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-787 . CIRCUIT OPERATION • The idle air control motor power is supplied from the MFI relay (terminal 4). • The ECM (terminals 14, 15, 28, 29) <M/T> or PCM (terminals 14, 15, 28, 29) <A/T> drives the . TECHNICAL DESCRIPTION • The amount of air taken in during idling is regu- lated by the opening and closing of the servo • If there is a malfunction of the IAC system, the actual engine speed will not be identical to the • The ECM <M/T> or PCM <A/T> checks the differ- ence between the actual engine speed and the . DESCRIPTIONS OF MONITOR METHODS over the specified value. . MONITOR EXECUTION . MONITOR EXECUTION CONDITIONS (Other 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) • Volume airflow sensor • Engine coolant temperature sensor • Intake air temperature sensor • Barometric pressure sensor • Throttle position sensor . AK300084 IDLE AIR CONNECTOR: B-34 AB B-34 (B) AK300121 MFI RELAY CONNECTOR: A-18X AB A-18X AK300091 CONNECTOR: C-51 <M/T> ECM AF C-51 (GR) AK300244 CONNECTOR: C-52 <A/T> AC PCM C-52 (GR) |