17.4 Common Troubleshooting
17.4.1 Repair Tools
a) Disassembling the parts of the electronic control system- common disassembly tools for auto
machinery parts
b) Circuit of the electronic control system and its electrical signal- digital multimeter (with beep)
c) Diagnosing the faults in the electronic control system and checking the engine's operation
Fault diagnostic apparatus for electronic control system (recommended)
Fault diagnosis software(PCHUD) and port wire (if available)
d) Fault code list of the electronic control system( for emergency)
e) Fuel pressure gauge, range: 0 ~ 300kPa
17.4.2 Operation Data Flow of the Engine Shown on the
Diagnostic Apparatus
Analyze and check the faults in engine through the operation data flow of the engine
shown on the diagnostic apparatus
17.4.2.1
Step One
a) Engine wire harness and vacuum line- may influence the system in controlling air flow and oil
supply.
b) Assembly of Oxygen sensor- may influence the system in judging the air-fuel ratio.
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