Troubleshooting Flowchart
Troubleshooting procedure
Troubleshooting structure
Driver introduction
Diagnosis location
Appearance checking and relevant
checking
Defected engine model
Master faults
Fault description
Basic tests
Running status
Check relevant system and equipment
Diagnosis description
Partial diagnosis
Fault description
Warranty adjustment
Maintenance description
Completion inspection
Driver feedback
Driver feedback
Three. Diagnosis parameters
1. Temperature and temperature change rate
Determine the engine fault mode and location by temperature and temperature change
rate.
Diagnostic scope:
A. Combustion status of media inside the engine combustion chamber;
B. Working status of the cooling system and lubrication system;
C. Engagement between clutch brake pad and pressure plate and the working status of the
transmission gear, etc;
D. Overcurrent status of electrical components and wires;
2. Pressure
Determine engine fault modes and locations by pressure.
Diagnostic scope:
A. The sealing between the engine throttle and throttle seat ring or between the
piston/piston ring and cylinder wall can be judged by the compression pressure of the
cylinder.
B. The working status of the lubrication system and the lubricating clearance may be
judged by the engine oil pressure;