Geely EC718, EC718RV, EC715, EC715RV. Manual part — 212
Geely EC718, EC718RV, EC715, EC715RV. Manual part - 212
(f)
Read control system DTC code again to confirm that the
system has no DTC code.
No
Intermittent Fault. Refer to
Yes
Step 4
Check ECM power supply circuit and ground circuit.
(a)
Check ECM power supply circuit and ground circuit. Refer
to "
.
ECM power and ground circuits normal?
No
Power and ground circuits fault.
Yes
Step 5
Replace ECM. Refer to
Engine Control Module Replacement
.
Next
Step 6
Carry out crankshaft position sensor learn. Refer to
Crankshaft Position Sensor (CKP) Learn
.
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)
Road test the vehicle for at least 10 min.
(f)
Read control system DTC code.
Verify that the system has no DTC code output.
No
Intermittent Fault. Refer to
Yes
Step 8
Diagnostic completed.
2.12.7.47 DTC P0646 P0647
1. DTC Descriptor:
DTC
P0646
Air-Conditioning Clutch Relay Circuit Short To Low Voltage or Open
DTC
P0647
Air-Conditioning Clutch Relay Circuit Short To High Voltage
Engine
Control System JL4G15-D
2-763
Air-Conditioning compressor working voltage is provide by main relay which is controlled by ECM. ECM controls Air-Conditioning
compressor relay internal ground through ECM harness connector EO35 terminal No.51 of, relay pull-in. ECM has a drive circuit
which controls relay coil ground, and drive circuit is equipped with a feedback circuit to ECM. By monitoring the feedback voltage,
ECM determines whether the control circuit is open, short to ground or short to power supply.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The DTC
(Control Strategy)
Fault Locations
P0646
Hardware Circuit Checks
When air-conditioning is not working,
with air-conditioning relay control
circuit open or short to ground, the
DTC code will be set.
1. Air-Conditioning Relay
2. ECM
3. Air-Conditioning Relay Circuit
P0647
Hardware Circuit Checks
When air-conditioning is not working,
with air-conditioning relay control
circuit open or short to ground, the
DTC code will be set.
1. Air-Conditioning Relay
2. ECM
3. Air-Conditioning Relay Circuit
3. Schematic:
Air-conditioning System Circuit Schematic
4. Diagnostic Steps:
Air-conditioning Clutch Inoperative
2.12.7.48 DTC P0650
1. DTC Descriptor:
DTC
P0650
Fault Indicator (MIL) Malfunction
CAN network is used in vehicles. Fault lamps are controlled via the instrument panel circuit. When ECM DTC code is set to light
fault lamps, ECM sends a "Light the fault lamp" signal through the CAN network the instrument panel. The instrument panel internal
circuit light the fault lamp indicating engine fault after receiving the instruction from ECM.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The DTC
(Control Strategy)
Fault Locations
P0650
Hardware Circuit Checks
Fault indicator output state and ECM
expected status does not match.
1. Instrument Cluster
2. CAN-Bus
Diagnostic Steps:
Step 1
Check other fault lights working.
(a)
Turn the ignition switch to "ON" position.
Other fault lights normal?
Yes
2-764
Control System JL4G15-D
Engine
No
Step 2
Repair instrument cluster circuit.
Instrument Repair
(a)
Repair instrument cluster power supply circuit. Refer to
(b)
Repair instrument cluster ground circuit. Refer to
Is fault resolved?
Yes
System normal.
No
Step 3
Check instrument DTC.
(a)
Connect scan tool.
(b)
Turn the ignition switch to "ON" position.
(c)
Scan instrument DTC.
Is there DTC code?
Yes
No
Step 4
Test fault indicator.
(a)
Connect scan tool.
(b)
Turn the ignition switch to "ON" position.
(c)
Choose scan tool "Function Test" menu and then "Fault Light
Test".
Is fault indicator lit?
Yes
No
Step 5
Replace instrument cluster.
(a)
Turn off the ignition switch and remove the ignition key.
(b)
Disconnect the battery negative cable.
(c)
Replace instrument cluster. Refer to
.
Is fault solved?
Yes
System normal.
No
Step 6
Check instrumentation and ECM network communication.
(a)
Repair instrumentation and ECM network communication
malfunction. Refer to
Engine
Control System JL4G15-D
2-765
Is fault solved?
Yes
System normal
No
Step 7
Repair ECM power supply circuits.
(a)
Repair ECM power supply circuit. Refer to
.
Is fault solved?
Yes
System normal.
No
Step 8
Replace ECM.
(a)
Connect scan tool.
(b)
Turn the ignition switch to "ON" position.
(c)
Scan ECM DTC codes, repair ECM Repair the faulty part. if
necessary, replace ECM. Refer to
(d)
Carry out crankshaft self learn after ECM replacement. Refer
to
Crankshaft Position Sensor (CKP) Learn
(e)
Clear malfunction code.
Next
Step 9
System normal.
2.12.7.49 DTC P0685
1. DTC Descriptor:
DTC
P0685
Main Relay Malfunction
Main relay is used to provide power to fuel injectors and oxygen sensors and other components. Battery provides power to main
relay terminal No.2. ECM controls main relay ground through ECM harness connector EO35 terminal No.62. ECM has a detection
circuit. By monitoring the feedback voltage, ECM determines whether the control circuit is open, short to ground or short to power
supply.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The DTC
(Control Strategy)
Fault Locations
P0685
Main Relay Malfunction
The main relay circuit control state
does not match ECM expected
status.
1. Main Relay Circuit
2. Main Relay
3. ECM
2-766
Control System JL4G15-D
Engine
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