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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-541 . Engine Control Module Main Processor • Refer to Inspection Procedure 22 − Power Supply System and Ignition Switch-IG System . . CIRCUIT OPERATION • Refer to Inspection Procedure 22 − Power Supply System and Ignition Switch-IG System . . TECHNICAL DESCRIPTION • Throttle actuator control processor checks the ECM for abnormal conditions. . DESCRIPTIONS OF MONITOR METHODS No watch dog pulse is detected. . 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) • Not applicable . DTC SET CONDITIONS Check Condition • Ignition switch is "ON" position. Judgement Criterion • No surveillance pulse signals should be input for 0.5 second. . FAIL-SAFE AND BACKUP FUNCTION • Throttle opening degree position is in default position. . OBD-II DRIVE CYCLE PATTERN None. . TROUBLESHOOTING HINTS (The most • MFI relay failed. ness damage or connector damage. • ECM failed. AK800785 AB Connector: C-304 ETACS-ECU C-304 |