Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Using This Section

TROUBLESHOOTING GUIDE, USING THIS SECTION

INTRODUCTION
Most of the fuel and emission control systems are electronically controlled, often making it difficult to diagnose problems, especially intermittent problems. Before undertaking actual checks, take a few minutes to talk with the customer who approaches with a driveability complaint. The customer is often a good source of information on such problems, especially the intermittent ones. Through a talk with the customer, you will usually find out what the symptoms are and under what conditions they occur.




Work flow




Diagnostic Index




Troubleshooting chart

DESCRIPTION:
Further describes the system.
Confirm that the chart addresses the actual Symptom before beginning troubleshooting.

STEP:
This shows the order of troubleshooting. Proceed with troubleshooting as indicated.

INSPECTION:
This describes an inspection to quickly determine the malfunction of parts.

ACTION:
This recommends the appropriate action to take as a result (Yes/No) of the INSPECTION.