Geely EC718, EC718RV, EC715, EC715RV. Manual part - 39

Geely EC718, EC718RV, EC715, EC715RV. Manual part - 39

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

(c)

Connect VVT solenoid valve wiring harness connector.

No

Replace VVT solenoid valve assembly. Go to
step 6

Yes

Step 2

Measure VVT solenoid valve working power supply voltage.

1

2

VVT Solenoid Harness Connector EN10

FE02-5006b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect VVT solenoid valve wiring harness connector
EN10.

(c)

Turn the ignition switch to "ON" position.

(d)

Use multimeter to measure EN10 harness connector terminal
No.1.

Standard Voltage: 11-14 V

(e)

Reconnect VVT solenoid valve wiring harness connector
EN10.

No

Check open circuit between EN10 solenoid
valve wiring harness connector terminal No.1
and the main relay terminal No.3 or short to
ground.

Yes

Step 3

Check VVT solenoid valve control circuit.

Engine

Control System JL4G18-D

2-71

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VVT Solenoid Harness Connector EN10

ECM Harness Connector EN01

FE02-5007b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect VVT solenoid valve wiring harness connector
EN10.

(c)

Disconnect ECM harness connector EN01.

(d)

Use multimeter to measure the resistance between VVT
solenoid valve wiring harness connector EN10 terminal No.
2 and ECM harness connector EN01 terminal No.2. For the
Standard Value. Refer to the table below.

(e)

Use multimeter to measure the resistance between VVT
solenoid valve wiring harness connector EN10 terminal No.
2 and the ground. For the Standard Value. Refer to the table
below.

(f)

Turn the ignition switch to "ON" position, (Note: At this time
EN01 and EN10 connectors must be disconnected.) Use
multimeter to measure the voltage between the VVT solenoid
valve wiring harness connector EN10 No.2 terminal and the
ground. For the Standard Value. Refer to the table below.

Test Connection

Standard Value

Resistance Between EN10 (2)
and EN01 (2)

Less than 1 Ω

Resistance Between EN10 (2)
and Ground

10 kΩ or higher

Voltage Between EN10 (2) and
Ground

0 V

All normal?

No

Repair or replace wiring harness connectors.

Yes

Step 4

Check ECM power supply circuit.

(a)

Check whether ECM power supply circuit is normal.

(b)

Check whether ECM ground circuit is normal.

No

Repair the faulty part.

Yes

Step 5

Replace ECM.

Next

Step 6

Use scan tool to confirm whether the DTC code is stored again.

(a)

Connect scan tool to the datalink connector.

(b)

Turn the ignition switch to "ON" position.

(c)

Clear DTC code.

(d)

Start and run the engine at idle speed to warm up engine for
at least 5 min.

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Control System JL4G18-D

Engine

(e)

Road test the vehicle for at least 10 min.

(f)

Read DTC control system code again to confirm that there is
no DTC code.

No

Intermittent Fault. Refer to

2.2.7.3

Intermittent

Fault Check

Yes

Step 7

Diagnostic completed.

5. Repair Instructions:

Replace VVT solenoid valve. Refer to

2.2.8.4

VVT Solenoid Valve Replacement and Filter Cleaning

.

2.2.7.13 DTC P000A P0012

1. DTC Descriptor:

DTC

P000A

Intake VVT Slow Response

DTC

P0012

VVT is not at the default location during air intake process.

The intake camshaft position actuator is connected to the intake camshaft and operated by hydraulic pressure. The hydraulic
pressure is provided by the engine oil pump in order to change the intake camshaft to the crankshaft relative position (CKP ) angle.
The intake VVT solenoid valve power supply is provided by The Main Relay. ECM modulates the pulse-width to control signal ground,
thus controlling the camshaft position actuator engine oil flow. Engine oil pressure moves the camshaft position actuator slide valve
at the front of the camshaft. When the safety slide valve is operated, the engine oil is imported into the camshaft position actuator,
so that camshaft rotates. The intake camshaft cam actuator can change the camshaft working angle up to 50°.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection Strategy

Conditions For Setting The DTC

(Control Strategy)

Fault Locations

P000A

VVT actual angle and target angle
difference is too great.

1. VVT actual angle and target angle

difference is too great.

2. Camshaft completed self learn.

3. Engine oil temperature is between

-40°C (-40 ºF) and 120°C (248 ºF).

4. Engine coolant temperature is

between 0°C (32 ºF) and 105°C
(221 ºF ).

5. Engine speed is between 600 rpm to

6,000 rpm.

6. No VVT circuit fault.

1. Valve Timing Chain

2. VVT Solenoid Valve

3. Solenoid Valve Filter

4. VVT Actuator Assembly

5. ECM

Engine

Control System JL4G18-D

2-73

DTC Code

DTC Detection Strategy

Conditions For Setting The DTC

(Control Strategy)

Fault Locations

P0012

VVT actual angle is not at the default
location.

1. VVT actual angle and target angle

difference is greater than or equal to
20°.

2. Camshaft completed self learn.

3. The engine running time is less than

or equal to 1.5 s.

4. The engine oil temperature is

between -40°C (-40 ºF) and 120°C
(248 ºF) .

5. The engine coolant temperature is

between 0°C (32 ºF) and 105°C
(221 ºF ).

6. Engine speed is between 600 rpm to

6,000 rpm.

7. No VVT circuit fault.

3. Schematic:

Refer to

2.2.7.12

DTC P0010 P2088 P2089

.

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 control system whether there are DTC codes other than DTC P0010, P2088, P2089, P000A, P0012.

(a)

Connect scan tool to datalink connector.

(b)

Turn the ignition switch to "ON" position.

(c)

Press the scan tool power button.

(d)

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

(e)

Read DTC codes.

DTC Codes Shown

To Step

DTC P0010, P2088, P2089

Yes

DTC Other Than DTC P0010, P2088, P2089

No

No

Refer to

2.2.7.11

DTC Code Index

Yes

Step 2

Check the following items.

(a)

Engine oil viscosity and clean circuits are normal.

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Control System JL4G18-D

Engine

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