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Engine Mechanical System JL4G18-D
2.6.7 Diagnostic Information and Procedures
2.6.7.1 Diagnosis Description
Refer to
2.6.3.1 System Working
that it will facilitate the correct diagnostic steps, more importantly, it will also help to determine whether the customer described the
situation is normal.
2.6.7.2 Visual Inspection
–
Check installed aftermarket equipment that may affect the mechanical systems performance.
–
Check easy to access system components to identify whether there is a significant damage that may lead to the fault.
–
Confirm whether the engine oil level is normal and whether the engine oil viscosity is normal.
–
Record engine speed, ambient temperature and other specific factors.
–
Compare with a known good engine to check whether the current engine status is normal.
2.6.7.3 Comprehensive Engine Inspections
1. Check engine coolant.
Refer to
2.8.8.1 Engine Coolant Discharge and
2. Check engine oil.
Refer to
2.9.7.4 Engine Oil Pressure Diagnostic and
3. Check the battery.
Refer to
2.11.2.3 Charging System Description and
4. Check the spark plug.
Refer to
2.10.7.6 Spark Plug
5. Check the air filter.
Refer to
2.11.2.3 Charging System Description and
6. Check the ignition timing.
Check the ignition timing. The following conditions must be met:
–
Engine reaches normal working temperature.
(1). Use scan tool to test methods:
Connect scan tool.
Step 1
EC718/EC718RV EC715/EC715RV 10/2009
PrincipleGet familiar with the system functions and operations before start system diagnostics, so
Filling.
Test.
Operation.
Diagnostic.
Operation.
Engine
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