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FI SYSTEM DIAGNOSIS 4-23
FI SYSTEM TROUBLESHOOTING
CUSTOMER COMPLAINT ANALYSIS
Record details of the problem (failure, complaint) and how it occurred as described by the customer. For this
purpose, use of such an inspection form such as below will facilitate collecting information required for
proper analysis and diagnosis.
EXAMPLE: CUSTOMER PROBLEM INSPECTION FORM
User name: Model: VIN:
Date of issue: Date Reg. Date of problem: Mileage:
Malfunction indicator
lamp condition (LED)
Always ON Sometimes ON Always OFF Good condition
Malfunction display/code
(LCD)
User mode: No display Malfunction display ( )
Dealer mode: No code
Malfunction code ( )
PROBLEM SYMPTOMS
Difficult Starting Poor Driveability
No cranking Hesitation on acceleration
No initial combustion Back fire/ After fire
No combustion Lack of power
Poor starting at
( cold warm always)
Surging
Abnormal knocking
Other Engine rpm jumps briefly
Other
Poor Idling Engine Stall when
Poor fast Idle Immediately after start
Abnormal idling speed
( High Low) ( r/min)
Throttle valve is opened
Throttle valve is closed
Unstable Load is applied
Hunting ( r/min to r/min) Other
Other
OTHERS: