How To Proceed Troubleshooting - Toyota ZZT230 series Repair Manual

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HOW TO PROCEED WITH TROUBLESHOOTING
cedure Carry out troubleshooting in accordance with the procedure on the following page. Here, only
is shown. Details are provided in Diagnostics section, showing the most effective methods for each
circuit. Confirm the troubleshooting procedures first for the relevant circuit before beginning troubleshooting circuit
of that
D
1
Customer Problem
Analysis
D
� �
=
2
�
tic Tro uble
4
lagnostlc Trouble
Code Chart
6
Circuit Inspection or Parts
Inspection
D
7
Repair
D
8
Confirmation T est
D
End
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INTRODUCTION
H O W
SYST MS
1
Ask the customer about the conditions and the
environment when the problem occurred.
(: ::J j
3
Sym pto m Sim u latio n
2, 3
Conti rm
and check the diagnostic trouble codes.
(Wh en the problem symptoms do not appear
durin g confirmation, use the symptom simulation
meth od described later on.)
4 , 5,
6
Chec k the results obtained in Step 2, then confirm
h
spectlon procedure for the system or the part
the in
whic
troubl e code chart or the problem symptoms table.
7
Check and repair the affected system or part in
accordance with the instructions in Step 6.
8
has
After completing repairs, confirm that the problem
been eliminated.
(If the problem is not reproduced, perform the
confirmation test under the same conditions and
in the same environment as when it occurred for
the first time.)
TO
TROUBLESHOOT ECU CONTROL LED
the problem
symptoms and
the
should be checked using the diagnostic
-··
the
basic pro·
conditions,