Toyota Celica 2005 Repair Manual page 24

Taking into account the points on the previous page, a flow chart showing how to proceed with troubleshoot-
ing using the diagnostic trouble code check is shown below. This flow chart shows how to utilize the diagnos-
tic 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 table.
D Diagnostic trouble code displayed
D Problem symptoms exist
Troubleshooting of problem indicated
by diagnostic trouble code
2005 CELICA (RM1131U)
INTRODUCTION
Diagnostic trouble code check
Making a note of and clearing of the diagnostic trouble codes displayed
Diagnostic trouble code check
D Normal code displayed
D Problem symptoms exist
− HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
Symptom confirmation
Problem symptoms
exist
Simulation test using the symptom
simulation methods
Troubleshooting of each
problem symptom
23
No problem symptoms
exist
D Normal code displayed
D No problem symptoms exist
System Normal
If a diagnostic trouble code was
displayed in the initial diagnostic
trouble code check, 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-
nectors (See page IN−30).
IN−23