TOHATSU MD 70-90C2 Service Manual page 311

Self-Diagnisos Mode 4 [Deletion of fault history]
In any of the states in the self-diagnosis mode 3, the fault history
is deleted by removing stop switch lock plate and pushing in key
for approximately 3 seconds. At this moment, the buzzer "Beeps"
three times.
Note: The operating hours is not deleted.
The self-diagnosis function ends.
Attach stop switch lock plate.
Regular operation is resumed.
The warning lamps and buzzer operate if any fault or
abnormality is left unsolved.
→Refer to Warning Indications List.
Note : The self-diagnosis function is stopped at any moment during
the above procedure when the key switch is set to "OFF".
TLDI 75/90C2 2010
Set key switch to "OFF".
Beep!!
Beep!!
Beep!!
ON
OFF
9
9-35