Symptom Related Diagnostic Procedures

Refer to Powertrain Management/ Procedures/ Diagnosis By Symptom: for a symptom that corresponds to an actual vehicle symptom. Symptom Related Diagnostic Procedures

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 a 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.




HOW TO READ SYMPTOM TROUBLESHOOTING CHARTS

DESCRIPTION:
This further describes the system. Confirm that the chart addresses the actual symptom before beginning troubleshooting.

TROUBLESHOOTING HINTS:
This describes the possible point of malfunction.

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

INSPECTION:
This describes an inspection to quickly determine the malfunction of parts. If a detailed procedure is necessary to perform the INSPECTION.

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