HINT:

In troubleshooting, the problem symptoms must be confirmed accurately and all preconceptions must be cleared in order to give an accurate judgment. To ascertain what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions when it occurred.
The following 5 items are important points in the problem analysis. Past problems which are thought to be unrelated and the repair history, etc. may also help in some cases. So as much information as possible should be gathered and its relationship with the problem symptoms should be correctly ascertained for a reference in troubleshooting. A customer problem analysis table is provided in the Diagnostics information for each system for your use.

Important Points in the 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 (Sample)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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