Geely EC718, EC718RV, EC715, EC715RV. Manual part — 40

Geely EC718, EC718RV, EC715, EC715RV. Manual part - 40

(b)

Check engine oil level. The engine oil level should be within
the range.

(c)

Check if engine oil needs to be replaced or contains additives
or engine oil viscosity is not correct.

All normal?

Replace the engine oil and oil filter, when
necessary, clean the engine lubrication
system.

Yes

Step 3

Check VVT solenoid valve resistance.

VVT Solenoid

FE02-5005b

(a)

Disconnect VVT solenoid valve wiring harness connector
EN10.

(b)

Measure VVT solenoid valve resistance between the two
terminals.

Standard Resistance: 9.4-10.6 Ω (68 ºF) when 20°C

Replace VVT solenoid valve. Refer to

2.2.8.4

VVT Solenoid Valve Replacement and

Filter Cleaning

. Go to step 8

Yes

Note

Connecting two wires directly is strictly prohibited in the testing process, as it might cause an explosion, fire and other
dangers.

Step 4

Check VVT solenoid valve operation.

FE02-5138b

VVT Solenoid

(a)

Connect the battery positive terminal with the VVT solenoid
valve terminal No.1 and the negative terminal with the VVT
solenoid valve terminal No.2.

(b)

Check the spool operation.

Spool activated?

Replacement VVT solenoid valve. Refer to

2.2.8.4

VVT Solenoid Valve Replacement and

Filter Cleaning

Engine

Control System JL4G18-D

2-75

Yes

Step 5

Check VVT solenoid valve filter.

FE02-0046b

(a)

Remove VVT solenoid valve filter.

(b)

Check whether filter is blocked.

(c)

Check whether filter is damaged.

(d)

Re-install VVT solenoid valve filter.

Does VVT solenoid valve filter work properly?

Clean VVT solenoid valve filter, if necessary,
replace the VVT solenoid valve filter.

Yes

Step 6

Check whether timing system is normal.

Timing Chain Cover Surface

FE02-0143b

(a)

Remove the cylinder head cover.

(b)

Align point D, rotate crankshaft pulley, so that timing mark on
the pulley aligned with the marked "0" on the timing chain
cover.

(c)

Check point C, make sure the camshaft timing gear timing
mark as shown in the graphic aligned with horizontal position.

(d)

Check points A, B point, make sure the distance between
intake and exhaust camshaft gear timing marks A and B is 8
timing chain section.

(e)

Re-install the cylinder head cover.

Are timing marks shown as in above graphics?

Adjust the valve timing.

Yes

Step 7

Replace VVT actuator assembly.

2-76

Control System JL4G18-D

Engine

Step 8

Check control system DTC code.

(a)

Connect scan tool to datalink connector.

(b)

Turn the ignition switch to "ON" position.

(c)

Press scan tool power button.

(d)

Select the following menu items: Engine/Read DTC codes.

(e)

Read DTC codes.

Are there DTC codes?

Intermittent Fault. Refer to

2.2.7.4

Fault

Symptom Table

Yes

Step 9

Diagnostic completed.

5. Repair Instructions:

The intake VVT actuator assembly is only replaced as as assembly. Do not repair its disassembled components. For VVT actuator
replacement, refer to

2.6.8.12

Camshaft Replacement

2.2.7.14 DTC P0016

1. DTC Descriptor:

DTC

P0016

Unreasonable Camshaft and Crankshaft Relative Installation Position

Engine Control Module (ECM) uses crankshaft position sensor (CKP) and camshaft position sensor (CMP) pulse signals to monitor
the correlation between crankshaft position and camshaft position. Crankshaft variable reluctance rotor has 60 teeth, of which two
missing teeth were used as a reference gap. Each tooth spaces 6° evenly, except the reference gap with a 12° interval. Camshaft
signal plate has 4 teeth, 2 narrow teeth and 2 wide ones. Each tooth trailing edge evenly spaces at 90°.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection Strategy

Conditions For Setting The DTC

(Control Strategy)

Fault Locations

P0016

The difference between
crankshaft and camshaft
synchronization learn value and
reference value

1. When camshaft and crankshaft

angle difference is greater than
20°, the DTC code is set. When
the angle is greater than 25°, the
camshaft and the crankshaft
adaptive is activated.

2. The camshaft and crankshaft

angle difference is greater than
the negative 25°.

1. Timing Chain Tensioner

2. Timing Chain

3. Crank Sprocket

4. Exhaust Sprocket

5. VVT Actuator

6. ECM

3. Schematic:

Refer to

2.2.7.29

DTC P0321 P0322

Engine

Control System JL4G18-D

2-77

4. Diagnostic Steps:

Note

Before carrying out this diagnosis step, observe the data list on scan tool and analyze the accuracy of the data, as
these will help with quick diagnosis.

Step 1

Check valve timing system.

(a)

Check whether camshaft, crankshaft and timing chain is
correct.

(b)

Check whether timing chain tensioning force is normal.

Go to step 4

Yes

Step 2

Check ECM power supply circuit.

(a)

Check whether ECM power supply circuit is normal.

(b)

Check whether ECM ground circuit is normal.

Repair the faulty part.

Yes

Step 3

Replace ECM.

Go to step 5

Note

Use of Lubrication system cleaner is not recommended. Such cleaning agents contain strong solvent and may have
side effects on seals and other engine components.

Step 4

Adjust and repair the mechanical timing system.

(a)

Read the vehicle service records and identify whether recent
services included the timing chain, camshaft or crankshaft,
and whether engine oil change intervals are too long.

(b)

If the engine oil is contaminated or contains impurities, the
reasons should be identified. Remove timing chain, camshaft
position actuators and the sprocket. Refer to

2.6.8.10

Timing

Chain Replacement

. Remove VVT solenoid valve that filters

the engine oil provided to the intake camshaft actuator. Refer
to

2.2.8.4

VVT Solenoid Valve Replacement and Filter

Cleaning

. Check filters and oil channel whether there are

impurities. Clean filters and replace the filter if necessary.

(c)

If the engine oil pressure is too low, identify causes and carry
out necessary repairs.