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 Always ON Sometimes ON Always OFF Good condition lamp condition (LED) Malfunction display/code User mode: No display Malfunction display ( ) (LCD) Dealer mode: No code Malfunction code ( ) PROBLEM SYMPTOMS Difficult Starting Poor Driveability No cranking Hesitation on acceleration No initial combustion Back fire/ After fire E No combustion Lack of power Poor starting at Surging L ( cold warm always) Abnormal knocking P Other Engine rpm jumps briefly Other M Poor Idling Engine Stall when Poor fast Idle A Immediately after start Abnormal idling speedS Throttle valve is opened ( High Low) ( r/min) Throttle valve is closed Unstable Load is applied Hunting ( r/min to r/min) Other Other OTHERS: