•  Includes the on-board diagnostic function and A/C operation check mode. The on-board diagnostic function consists of a malfunction detection function that detects malfunctions in input/output signals, a memory function that stores detected malfunctions, a fail-safe function that prevents an operating malfunction of output parts where a malfunction is detected, and a malfunction display function that displays detected malfunctions.

•  The malfunction display function and output device operation function is accessed by connecting GND to the check connector.