Electronic Control Module ECM 317-3869-05 Machine control computer board for CAT F-series excavators including 323F, 336F, 352F, 374F, and 390F models. Key Features Electronic control module supplied as 317-3869 and 317-3869-05 revision Machine control ECM for CAT F-series excavator deck Compatible with 323F, 336F, 352F, 374F and 390F excavators Related F-series controller numbers: 462-0006, 430-7160, 489-9456 Programming confirmed against your machine serial before shipment