Toyota Corolla 2004 Manual page 27

01–24
5 DTC check
b
6 Symptom confirmation
b
Troubleshooting of each problem symptom
The problem is still occurring in a place other than the diagnostic circuit (The DTC displayed first is either
for a past problem or it is a secondary problem).
2004 COROLLA (RM1037U)
INTRODUCTION – HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
a Troubleshooting of problem indicated by DTC
If a DTC is displayed in the initial DTC check, it indicates that
a trouble may have occurred in a wire harness or connector in
that circuit in the past, therefore check the wire harness and
connectors (See page 01–30).
a System normal
Normal code displayed
No problem symptoms exist
Problem symptoms exist
Author : Date :
DTC displayed
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