HINT:

In troubleshooting, the problem symptoms must be confirmed accurately. Preconceptions should be discarded in order to give an accurate judgement. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time it occurred.
As much information as possible should be gathered for reference. Even past problems that seem unrelated may also help in some cases. In the Diagnostic Section, a customer problem analysis table is provided for each system.
5 items are important points in the problem analysis:

Important Points with Customer Problem Analysis

What ______ Vehicle model, system name
When _______ Date, time, occurrence frequency
Where _______ Road conditions
Under what conditions? _______ Running conditions, driving conditions, weather conditions
How did it happen? _________ Problem symptoms

(Sample) Supplemental Restraint System check sheet.

Fig 1: Customer Problem Analysis Check Sheet

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Customer Problem Analysis