Important Points with Customer Problem Analysis
D
What ---------- Vehicle model, system name
D
When ---------- Date, time, occurrence frequency
D
Where ---------- Road conditions
D
Under what conditions? ---------- Running conditions, driving conditions, weather conditions
D
How did it happen? ---------- Problem symptoms
Example:
SUPPLEMENTAL RESTRAINT SYSTEM Check Sheet
Customer’s Name
Date Vehicle Brought In
VIN
License Plate No.
Odometer Reading
km
miles
Date Problem First Occurred
Weather
Temperature
Vehicle Operation
Fine
Cloudy
Starting
Idling
Driving
Constant speed
Acceleration
Other
Inspector’s
Name
CUSTOMER PROBLEM ANALYSIS CHECK
Production Date
Rainy
Snowy
Other
/
/
/
/
Approx.
Deceleration
[
]
01--24
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INTRODUCTION
HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
COROLLA Supplement (RM1129E)
CUSTOMER PROBLEM ANALYSIS
HINT:
S
In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconcep-
tions should be discarded in order to give an accurate judgement. To clearly understand what the prob-
lem symptoms are, it is extremely important to ask the customer about the problem and the conditions
at the time it occurred.
S
As much information as possible should be gathered for reference. Past problems that seem unrelated
may also help in some cases. In the ”Diagnostics” section, a Customer Problem Analysis Check sheet
is provided for each system.
S
5 items are important points in the problem analysis:
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To Sub Index
TOYOTA COROLLA REPAIR MANUAL SUPP 1129E
