REALTIME DIAGNOSTIC METHOD OF POWER TRANSISTOR FOR BLOWER MOTOR

摘要

PURPOSE: A real time diagnostic method of a power transistor for a blower motor is provided to detect exact error by diagnosing a power transistor on a real time basis. CONSTITUTION: In case target voltage value inputted into a power transistor is not changed or the target voltage value is changed(S10), whether base time passes or not is determined(S30) by operating a timer based on the time when the target voltage value is changed(S20). The open/short-circuit error of the power transistor is decided for real-time diagnosis(S60,S90).