User Manual
UT108/109 OPERATING MANUAL
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2. Contact the local retailers of automotive components.
3. Contact the local libraries to look up any book for the proofreading of your automotive
servicing manual so as to provide you with the latest information.
B.before the diagnosis of any trouble opens the engine hood to make a thorough
visual inspection. You will nd the causes for many of your problems to be
solved, which will save you a lot of time.
1. Has the automobile recently been serviced? Has the same problem sometimes
occurred where the trouble lies?
2. Do not try to nd any short cut. Check the hoses and leads where it is probably very
difcult to nd out where any trouble lies.
3. Check any trouble with the air purier or pipeline system.
4. Check any damage to any sensor or the driving gear.
5. Check the ignition lead: any breakage of any terminal, crack on any spark plug or
breakage at the insulation of the ignition lead.
6. Check all the vacuum hoses: any right line, shrinkage, bend, crack, fracture or damage.
7. Check the leads: any connection of sharp edges, connection of hot surfaces (such as
exhaust manifold), shrinkage, burn or scratch at the insulation or right line connection.
8. Check circuit connections: any pin corrosion, bend or damage, inappropriate connection
position or damaged electrode lead.