Lexus Workshop Service and Repair Manuals

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

Customer Problem Analysis Check

(Sample) Supplemental restraint system check sheet.

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART