Geely EC718, EC718RV, EC715, EC715RV. Manual part — 56
Geely EC718, EC718RV, EC715, EC715RV. Manual part - 56
Voltage Between EN13 (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)
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 10
Diagnostic completed.
5. Repair Instructions:
Replace the fuel injector. Refer to
.
2.2.7.27 DTC P0204 P0270 P0271
1. DTC Descriptor:
DTC
P0204
Cylinder No.4 Fuel Injection Control Circuit Open
DTC
P0270
Cylinder No.4 Fuel Injector Control Circuit Short to Ground
DTC
P0271
Cylinder No.4 Fuel Injector Control Circuit Short to Power Supply
Engine
Control System JL4G18-D
2-139
Fuel injector operating voltage is provided by The Main Relay which is controlled by ECM. Battery voltage passes through the main
relay terminal No.3 to all fuel injector wiring harness connectors terminal No.1. ECM controls fuel injector ground circuit by ECM
harness connector EN01 terminal No.64. ECM monitors all fuel injector driver circuit status, if ECM detects driving circuit
corresponding voltage is incorrect, ECM will set up a fuel injector control circuit fault DTC code.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The
DTC (Control Strategy)
Fault Locations
P0204
P0270
P0271
Hardware Circuit Checks
1. Circuit Open.
2. Circuit Short to Ground.
3. Circuit Short to Power Supply.
1. Sensor Circuit
2. Sensor
3. ECM
3. Schematic:
12
From Battery
Main Relay
Engine
Control
Module
Cylinder No.4 Fuel Injector
FE02-5069b
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
Initial Inspection
2-140
Control System JL4G18-D
Engine
(a)
Check the fuel injector wiring harness connector for damage,
poor connection, aging or signs of loosening.
Next
Step 2
Measure the resistance of fuel injector assembly.
2
1
Cylinder No.4 Fuel Injector
FE02-5070b
(a)
Disconnect the fuel injector wiring harness connector EN14.
(b)
Measure resistance between the two fuel injector terminals.
Standard Resistance: 20°C (68 ºF) 11.5-12.5 Ω
(c)
Connect the fuel injector wiring harness connector EN14.
No
Replace fuel injector assembly. Refer to
Yes
Step 3
Measure fuel injectors working power supply.
1
2
Cylinder No.4 Fuel Injector Harness
Connector EN14
FE02-5071b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect cylinder No.4 fuel injector wiring harness
connector EN14.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure voltage between cylinder No.4 fuel injector wiring
harness connector EN14 No.1 terminal and a reliable ground.
Standard Voltage: 11-14 V
(e)
Connect cylinder No.4 fuel injector wiring harness connector
EN14.
Is voltage normal?
No
Yes
Step 4
Check the fuel injector control circuit.
Engine
Control System JL4G18-D
2-141
1
2
Cylinder No.4 Fuel Injector Harness
Connector EN14
FE02-5072b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect cylinder No.1 fuel injector wiring harness
connector EN14.
(c)
Connect test lamp made from light-emitting diodes to the fuel
injector wiring harness connector EN14 terminal No.1 and
No.2.
(d)
Start the engine.
(e)
Check whether the test lamp is flashing as per normal.
Is test lamp flashing as per normal?
No
Yes
Step 5
Check and repair cylinder No.4 fuel injector power supply circuit.
G
1
2
5 3
1413 12 1110
5
1
2
3
4
6
7
8
9
J
L
K
I
G
D
C
B
E
F
A
86
86
30
87
85
86
86
87
87
87
30
30
30
85
85
85
2
2
3
3
5
5
1
1
1
2
5 3
1
2
5 3
86
87
30
1
1
2
5
3
2
5
3
85
EF01
EF21
EF18
EF25
EF20
EF29
EF06
EF02
EF30
EF17
EF19
EF23
EF22
EF26
EF24
EF08
EF27
EF28
EF05
EF07
EF16
EF04
EF03
EF15
EF12
EF10
EF1
1
EF09
EF13
EF14
EF32
EF31
1
2
Cylinder No.4 Fuel Injector Harness
Connector EN14
FE02-5073b
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect the fuel injector wiring harness connector EN14.
(c)
Remove the engine main relay.
(d)
Measure resistance between cylinder No.4 fuel injector
wiring harness connector EN14 terminal No.1 and engine
main relay terminal No.3.
(e)
Measure resistance between cylinder No.4 fuel injector
wiring harness connector EN14 terminal No.1 and a reliable
ground
Test Items
Standard Value
EN14 (1) and Main Relay Terminal No.3
Less than 1 Ω
EN14 (1) and a Reliable Ground
10 kΩ or higher
(f)
Install the engine main relay.
(g)
Connect cylinder No.4 fuel injector wiring harness connector
EN14.
Exclude the fuel injector power supply circuit fault.
Next
Step 6
Check cylinder No.4 fuel injector control circuit.
2-142
Control System JL4G18-D
Engine
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