Important Points in the 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
(Sample) Engine control system check sheet.
ENGINE CONTROL SYSTEM Check Sheet
Customer’s Name
Driver’s Name
Data Vehicle
Brought in
License No.
Model and Model
Year
Frame No.
Engine Model
Odometer Reading
km
miles
Problem Symptoms
Engine does
not Start
Difficult to
Start
Poor Idling
Poor
Drive ability
Engine Stall
Others
Engine does not crank No initial combustion No complete c ombustion
Engine cranks slowly
Other
Incorrect first idle Idling rpm is abnormal High ( rpm) Low ( rpm)
Rough idling
Other
Hesitation Back fire Muffler explosion (after--fire) Surging
Knocking
Other
Soon after starting After accelerator pedal depressed
After accelerator pedal released
During A/C operation
Shifting from N to D
Other
Datas Problem
Constant Sometimes ( times per day/month)
Inspector’s
Name
CUSTOMER PROBLEM ANALYSIS CHECK
--INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
IN --11
1 . CUS TO ME R P RO BLE M ANALY S I S
In troubleshooting, the problem symptoms must be confirmed accurately and all preconceptions must be
cleared away in order to give an accurate judgement. To ascertain just what the problem symptoms are, it
is extremely important to ask the customer about the problem and the conditions at the time it occurred.
Important Point in the Problem Analysis:
The following 5 items are important points in the problem analysis. Past problems which are thought to be
unrelated and the repair history, e tc. 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 reference
in troubleshooting. A customer problem analysis table is provided in the troubleshooting section for each
system for your use.
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