Toyota Celica Supra 1986 Service And Repair Manual page 661

BODY ELECTRICAL SYSTEM -Trip Computer
TRIP COMPUTER
PRECAUTIONS
BE·113
1. Before beginning lroubleshooting, ched< that the crip
comput« operation is oorrect.
2. Fim check the wirl1111 connector lines
(S<!e
page
BE-112}
and confirm that the lnpyt source is normal.
3. When
checking vott.ge, resistance, etc., use
1
high·
imped1nce type test« (it is impossible with a simple
tester}.
4.
Do not lttempt to di-enlble o r r..,.ir individuol com·
ponentl.
5. Do not 1ttempt to mike checks with an exteonal power
(batteoy, otc.} applied directly to the component.
6. In the flow chart, th«e is 1 high problbility that the
replacement
pert
will solve the problem, although it i•
not 100% guaranteed.
7. Do not touch circuit components os there
is
danger of
circuit domoge due to stotic electricity. N - revene
botteoy
connection~ u
it could result in instant damoge
to the inteoior of the components.
8.
Do
not disconnect the botteoy while the engine
is
running
as this would couse an iMtlnt reveose
cfwve
(100V},
resulting in domege to the interior of the components.
9. Always disconnect the
battery
terminals before pulling
apart connectors or terminals.
10. To pr8Yent damoge, hendla meters with care.