Preventive maintenance is one of other issues to maintain vehicle performance. Every vehicle needs
a good handling when it is going to be worked on the road. Vehicle are consists of spare parts.
Paying attention for the spare parts must be considered by every driver. Preventive maintenance is
conducted to decrease costs as a results of used vehicle. When doing preventive maintenance, there
are many types of works that should be known by a driver i.e.: checking parts, settlement,
replacement, etc. In this study, distance kilometer and operational interval service in periodic level
are being consideration to give information about vehicle preventive maintenance areas which is
being showed it on board diagnostic warning on vehicle dashboard. In this study, the two
parameters generally determine vehicle preventive maintenance diagnostic as the impact of them as
long as a periodic time. Instrument process by using fuzzy design which can show us about stepping
that should have to be done when it is working. When reading the information from on board
diagnostic, the position of diagnostic instrument will show if it is the time for setting, checking or
replacing of all parts. There are some conditions can be showed by instrumentation designing.
Firstly, when the diagnostic position is showing null level can express that it is not being necessary
to do anything for doing maintenance time. At the second, when diagnostic position is between at
null level and one level the instrument can give the information needs to be checked at the areas of
preventive maintenance including i.e. checked, settling and replacing of the spare parts to be
maintained. The third, when the lamp shows us full level (one level), this instrument shows us to do
breakdown vehicle maintenance. The diagnostic instrument is on the dashboard by using analog
device for giving information about vehicle performance.
