General Information

B1645 Drive Unit Failure

General Information

Component Location





General Description

Power sliding door (here in after PSD) is the system which moves sliding door of vehicle by electronic motor so that user can open or close door with less force than required on manual operation. PSD consists of drive unit, center roller/rail, handle and various kinds of switch (anti pinch, detent, latch), Drive unit is located at rear quarter panel that is between C pillar and D pillar. It is core part of PSD that drives cable by force of motor to move sliding door. beside that Drive unit consists of PSD ECU, door motor, clutch, optical sensor, cable and warning buzzer. When power door open signal is received, PSD ECU operates motor of drive unit and clutch transmits it to cable through clutch drum. then cable moves door. Optical sensor monitors these system operation and delivers it to PSD ECU.

DTC Description

The ECM sets DTC B1645 if the door doesn't move to intended position within specificated time at power mode operation

DTC Detecting Condition





Schematic Diagram