Geely EC718, EC718RV, EC715, EC715RV. Manual part — 64
Geely EC718, EC718RV, EC715, EC715RV. Manual part - 64
Step 9
Check whether there is exhaust leakage.
Yes
Repair the faulty part. Go to step 11
No
Step 10
Replace the post-catalytic oxygen sensor. Refer to
Post-Catalytic Oxygen Sensor Replacement
Next
Step 11
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 the engine
for at least 5 min.
(e)
Road test the vehicle for at least 10 min.
(f)
Read control system DTC code again to confirm that the
system has no DTC code.
No
Intermittent Fault. Refer to
Yes
Step 12
Diagnostic completed.
2.2.7.33 DTC P0444 P0458 P0459
1. DTC Descriptor:
DTC
P0444
Canister Control Valve Control Circuit Open
DTC
P0458
Canister Control Valve Control Circuit Voltage Too Low
DTC
P0459
Canister Control Valve Control Circuit Voltage Too High
EVAP solenoid valve absorbs fuel vapor from the evaporative emission canister to the intake manifold. EVAP solenoid valve is
controlled by the pulse width modulation (PWM). The circuit consists of:
–
Operating Voltage: Battery voltage passes through ECM controlled main relay terminal No.3 to reach EVAP solenoid harness
connector EN24 terminal No.1.
–
ECM control circuit: EVAP solenoid valve wiring harness connector EN24 terminal No.2 is connected to ECM harness connector
EN01 terminal No.37. ECM has an internal driver circuit to control the solenoid valve ground. Driver circuit is equipped with a
ECM feedback circuit. ECM monitors the feedback voltage to determine whether the control circuit is open, short to ground or
short to power supply.
Engine
Control System JL4G18-D
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2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The DTC
(Control Strategy)
Fault Locations
P0444
P0458
P0459
Hardware Circuit Checks
1. Circuit Open.
2. Circuit Short to Ground.
3. Circuit Short to Power Supply.
1. Canister Solenoid Valve
Circuit
2. Solenoid Valve
3. ECM
3. Schematic:
12
From Battery
Main Relay
Evaporative Canister
Solenoid
Engine
Control
Module
FE02-5093b
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
Test the Canister solenoid valve with a scan tool.
(a)
Connect scan tool to the "Data Link Connector".
(b)
Disconnect the Canister solenoid valve to the Canister
vacuum tubes.
(c)
Start engine and turn on the scan tool.
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Control System JL4G18-D
Engine
(d)
Select the following menu: "Engine"/"Action Test"/"Canister
Solenoid Valve".
(e)
Use scan tool to enable the use of "Canister Control Valve".
Place a finger over the vacuum port solenoid valve and check
whether there is suction.
Yes
Intermittent Fault. Refer to
No
Step 2
Measure canister solenoid valve resistance.
Evaporative Canister Solenoid
FE02-5094b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect canister solenoid valve harness connector EN24.
(c)
Measure resistance between the canister solenoid valve two
terminals.
Standard Resistance: 25 Ω at 20°C (68 ºF)
(d)
Connect canister solenoid valve harness connector EN24.
Is the value specified value?
No
Replace the canister solenoid valve. Refer to
Yes
Step 3
Measure canister solenoid valve working power supply.
Evaporative Canister Solenoid Harness
Connector EN24
1
2
FE02-5095b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect canister solenoid valve harness connector EN24.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure voltage between canister solenoid valve wiring
harness connector EN24 terminal No.1 and a reliable ground.
Standard Voltage: 11-14 V
(e)
Connect canister solenoid valve harness connector EN24.
Is the value specified value?
No
Check whether there is an open circuit or a
circuit short to ground between solenoid valve
wiring harness connector EN10 terminal No.
1 and main relay terminal No.3. Repair the
faulty part. Go to step 7
Yes
Step 4
Check canister solenoid valve control circuit.
Engine
Control System JL4G18-D
2-173
1
3
5
7
8
6
4
2
9
10
11
12
13
23
24
25
26
27
28
29
30
37
51
52
53
54
55
56
57
58
59
60
61
62
63
64
38
39
40
41
42
43
44
45
46
47
48
49
50
31
32
33
34
35
36
14
15
16
17
18
19
20
21
22
ECM Harness Connector EN01
Evaporative Canister Solenoid Harness Connector EN24
1
2
FE02-5096b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect canister solenoid valve harness connector EN24.
(c)
Disconnect ECM harness connector EN01.
(d)
Measure resistance between canister solenoid valve wiring
harness connector EN24 terminal No.2 and ECM harness
connector EN01 terminal No.37. Check whether the circuit is
open.
(e)
Measure resistance between canister solenoid valve wiring
harness connector EN24 terminal No.2 and a reliable ground.
Check whether the circuit is short to ground.
(f)
Measure voltage between canister solenoid valve wiring
harness connector EN24 terminal No.2 and a reliable ground.
Check whether the circuit is short to power supply.
Test Items
Standard
Value
Resistance Between EN24 (2) and EN01 (37)
Less than 1 Ω
Resistance Between EN24 (2) and a Reliable
Ground
10 kΩ or
higher
Voltage Between EN24 (2) and a Reliable
Ground
0 V
Are the values specified values?
No
Repair or replace the wiring harness
connectors. Go to step 7
Yes
Step 5
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 6
Replace ECM.
Next
Step 7
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 the engine
for at least 5 min.
(e)
Read control system DTC code again to confirm that the
system has no DTC code.
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Control System JL4G18-D
Engine
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