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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-157 CIRCUIT OPERATION • A 5-volt voltage is supplied to the manifold abso- lute pressure sensor power terminal (terminal No. • A voltage that is proportional to the intake mani- fold pressure is sent to the ECM (terminal No. 45) . TECHNICAL DESCRIPTION • The manifold absolute pressure sensor outputs a voltage which corresponds to the intake manifold • The ECM checks whether this voltage is within a specified range. . DESCRIPTIONS OF MONITOR METHODS Manifold absolute pressure sensor output voltage is out of specified range. . MONITOR EXECUTION Continuous . MONITOR EXECUTION CONDITIONS Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Not applicable Sensor (The sensor below is determined to be normal) • Engine coolant temperature sensor • Throttle position sensor • Mass airflow sensor • Intake air temperature sensor • Barometric pressure sensor . |