Geely EC718, EC718RV, EC715, EC715RV. Manual part - 45
Geely EC718, EC718RV, EC715, EC715RV. Manual part - 45
1
2
3
4
Intake Air Pressure Temperature
Harness Connector EN16
FE02-5026b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect intake air pressure and temperature sensor
wiring harness connector EN16.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure resistance between intake air pressure and
temperature sensor wiring harness connector EN16 terminal
No.1 and a reliable ground.
Standard Resistance: Less than 3 Ω
(e)
Connect intake air pressure and temperature sensors wiring
harness connector EN16.
Is resistance normal?
No
Go to step 6
Yes
Go to step 7
Step 5
Check intake air temperature sensor signal circuit.
1
3
5
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8
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4
2
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23
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14
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18
19
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22
ECM Harness Connector EN01
1
2
3
4
Intake Air Pressure Temperature
Harness Connector EN16
FE02-5027b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect intake air pressure and temperature sensor
wiring harness connector EN16.
(c)
Disconnect ECM harness connector EN01.
(d)
Measure resistance between intake air pressure and
temperature sensor wiring harness connector EN16 terminal
No.2 and ECM harness connector terminal No.25. Check
whether the circuit is open.
(e)
Measure resistance between intake air pressure and
temperature sensor wiring harness connector EN16 terminal
No.2 and a reliable ground. Check whether the circuit is short
to ground.
(f)
Measure voltage between intake air pressure and
temperature sensor wiring harness connector EN16 terminal
No.2 and a reliable ground. Check whether the circuit is short
to power supply.
Test Items
Standard Value
Resistance Between EN16 (2) and EN01 (25)
Less than 1 Ω
Resistance Between EN16 (2) and a Reliable
Ground
10 kΩ or higher
Voltage Between EN16 (2) and a Reliable
Ground
0 V
Next
Go to step 7
Step 6
Check intake air temperature sensor ground circuit.
Engine
Control System JL4G18-D
2-95
1
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5
7
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6
4
2
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13
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24
25
26
27
28
29
30
37
51
52
53
54
55
56
57
58
59
60
61
62
63
64
38
39
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48
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50
31
32
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34
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36
14
15
16
17
18
19
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22
ECM Harness Connector EN01
1
2
3
4
Intake Air Pressure Temperature
Harness Connector EN16
FE02-5028b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect intake air pressure and temperature sensor
wiring harness connector EN16.
(c)
Disconnect ECM harness connector EN01.
(d)
Measure resistance between intake air pressure and
temperature sensor wiring harness connector EN16 terminal
No.1 and ECM harness connector terminal No.40. Check
whether the circuit is open. If there is no open circuit,repair
the faulty part.
(e)
Measure voltage between intake air pressure and
temperature sensor wiring harness connector EN16 terminal
No.1 and a reliable ground. Check whether the circuit is short
to power supply. If there is no short circuit,repair the faulty
part.
Test Items
Standard Value
Resistance Between EN16 (1) and
EN01 (40)
Less than 1 Ω
Voltage Between EN16 (1) and a
Reliable Ground
0 V
Execute next step as per normal.
Next
Step 7
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 8
Replace ECM.
Next
Step 9
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.
No
Intermittent Fault. Refer to
2.2.7.3
Intermittent
Fault Check
2-96
Control System JL4G18-D
Engine
Yes
Step 10
Diagnostic completed.
5. Repair Instructions:
Replace intake air pressure and temperature sensor. Refer to
2.2.8.7
Intake Air Pressure and Temperature Sensor Replacement
.
2.2.7.19 DTC P0117 P0118
1. DTC Descriptor:
DTC
P0117
Engine Coolant Temperature Sensor Circuit Voltage Too Low
DTC
P0118
Engine Coolant Temperature Sensor Circuit Voltage Too High
ECT sensor is a variable resistor with negative temperature coefficient and is used to measure engine coolant temperature. ECM
provides 5V voltage through ECM harness connector EN01 terminal No.41 ECT sensor harness connector EN23 terminal A. It also
provides a low reference voltage through EN01 terminal No.40 to the ECT sensor connector EN23 terminal C. ECM will always
record the length of time the ignition switch off. When starting if it reaches the set ignition switch off time, the engine control module
will compare the engine coolant temperature and intake air temperature in order to determine whether the temperature difference
is within the normal working range.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection
Strategy
Conditions For Setting The DTC (Control Strategy)
Fault Locations
P0117
P0118
1. More Than the
Upper Limit
2. Lower Than the
Lower Limit
1. Short to Ground. The engine coolant temperature is higher
than 140°C (284 ºF).
2. Short to power supply. The engine coolant temperature is
lower than -37.5°C (-35.5 ºF).
1. Sensor Circuit
2. Sensor
3. ECM
Engine
Control System JL4G18-D
2-97
3. Schematic:
Engine Coolant Temperature Sensor
Engine
Control
Module
FE02-5029b
4. Diagnostic Steps:
Warning!
Refer to "Cooling System Servicing Warning" in "Warnings and Notices".
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.
Note
It is not recommended at any time to use flammable anti-freezer, such as alcohol. Combustible anti-freezer can cause
serious fires.
Step 1
Initial Inspection
(a)
Check the engine coolant temperature sensor whether there
is evidence of corrosion, as well as the engine coolant leaking
through the sensor.
(b)
Check the cooling system whether the engine coolant level
is correct.
Next
Step 2
Measure engine coolant temperature sensor resistance.
2-98
Control System JL4G18-D
Engine