Geely EC718, EC718RV, EC715, EC715RV. Manual part - 100
Geely EC718, EC718RV, EC715, EC715RV. Manual part - 100
2.6.6 Schematic
2.6.6.1 Schematic
VVT Solenoid
Engine Control Module
Engine Coolant
Temperature Sensor
Vehicle Speed Sensor
Intake Air Pressure
Temperature Sensor
Camshaft Position Sensor
Crankshaft Position Sensor
Throttle Body Position Sensor
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2.6.7 Diagnostic Information and Procedures
2.6.7.1 Diagnosis Description
Refer to
2.6.3.1
System Working Principle
Get familiar with the system functions and operations before start system diagnostics, so
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 Filling
.
2. Check engine oil.
Refer to
2.9.7.4
Engine Oil Pressure Diagnostic and Test
.
3. Check the battery.
Refer to
2.11.2.3
Charging System Description and Operation
.
4. Check the spark plug.
Refer to
2.10.7.6
Spark Plug Diagnostic
.
5. Check the air filter.
Refer to
2.11.2.3
Charging System Description and Operation
.
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:
Step 1
Connect scan tool.
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(a)
Turn the ignition switch to "OFF" position.
(b)
Connect scan tool to the datalink connector.
(c)
Start and run the engine to normal working temperature.
(d)
Turn off A/C switch.
(e)
Select in sequence: Engine / Data List / Cylinder No.1 ignition
advance angle.
Standard Timing: Standard idling 8 ° -14 ° before TDC.
(2). Use the timing light to test:
Step 1
Remove the engine hood cover.
Next
Step 2
Pull out cylinder No.1 high-pressure resistor wire.
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As shown, the lights are connected to cylinder No.1 high-pressure
resistor wire.
Next
Step 3
Check the ignition timing when idling.
Standard Timing: Standard idling 8 ° -14 ° before TDC.
Next
Step 4
Check the ignition timing during acceleration.
Engine
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Accelerate the engine, observe the engine ignition timing, which
should be moving ahead as shown.
Next
Step 5
Remove the timing light to restore high-voltage resistor wire.
Next
Step 6
End of the test.
7. Cylinder Compression Test
Note
Remove EF12 fuses. Fuel and ignition systems can not work. After the test clear the DTC code with a scan tool.
Before the compression test is done, the following conditions must be met:
–
Engine reaches normal working temperature.
–
Full throttle
–
Remove all four cylinder spark plugs.
–
Battery fully charged.
Note
During the start up test, the ignition switch can not remain at the "ST" position for more than 15 s, otherwise it will
damage the starter.
Step 1
Test pressure of each cylinder, pressure drop may be due to valve closure or piston ring wear.
Next
Step 2
Spray proper amount of engine oil into each cylinder
Next
Step 3
Install the cylinder pressure test gage to the apark plug installation port.
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