PURPOSE: To make it possible to surely inform abnormality in, for example, an oil volume, by providing a device for detecting and alarming abnormality in an pre-start insepction items in which an alarm is issued after a predetermined time period when abnormality is detected, on the basis of the signals stored before operation.

CONSTITUTION: The output of an one-shot multi-vibrator 3 becomes H-level when a starter switch is turned-on, since a detecting signal is H-level if the volume of liquid is insufficient, and, therefore, the outputs from a NAND gate 4 and a flipflop 5 are held at L and H-levels, respectively, which are surely stored unless the starter switch is turned-off. When H signal is issued by running an engine, the signal H is delivered to a timer 1 which, therefore, holds the H signal in a predetermined time period such as, for example, 10 sec., and then switched the signal into an L signal that is reversed into H-level through a NOT circuit 2 and is delivered to An AND gate 6. At this stage, both outputs of the gate 6 and an OR gate 7 become H-level since the output of thr above-mentioned flipflop 5 is H-level so that a transister 82 is energized for illuminating an alarm lamp 81. However, the lamp is not illuminated if the flipflop 5 holes a normal signal.