Diagnostic trouble code check
Making a note of and clearing of the diagnostic trouble codes displayed
Symptom confirmat ion
No problem symptoms
exist
Problem symptoms
exist
Simulation test using the symptom
simulation methods
D Normal code displayed
D Problem symptoms exist
D Normal code displayed
D No problem symptoms exist
Diagnostic trouble code check
T roubleshooting of problem indicated
by diagnostic trouble code
D Diagnostic trouble code displayed
D Problem symptoms exist
System Normal
T roubleshooting of each
problem symptom
If a diagnostic trouble code was
displayed in the initial diagnostic
trouble code c heck , it indicates
that the trouble may have occurred
in a wire harness or connector in
that circuit in the past. Therefore,
check the wire harness and con-
nec t or s ( S ee page I N -- 20) .
--INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
IN --13
Taking into account the above points, a flow chart showing how to proceed with troubleshooting using the
diagnostic trouble code check is shown below. This flow chart shows how to utilize the diagnostic trouble
code check effectively, then by carefully checking the results, indicates how to proceed either to diagnostic
trouble code troubleshooting or to troubleshooting of problem symptoms.
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