Geely EC718 2009 Workshop Manual page 846

2-764 Control System JL4G15-D
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
P0646
P0647
3. Schematic:
Refer to 8.2.6.2 Air-conditioning System Circuit
4. Diagnostic Steps:
Refer to 8.2.7.6 Air-conditioning Clutch
2.12.7.48 DTC P0650
1. DTC Descriptor:
DTC P0650
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
P0650 Hardware Circuit Checks
Diagnostic Steps:
Check other fault lights working.
Step 1
EC718/EC718RV EC715/EC715RV 10/2009
Hardware Circuit Checks
Hardware Circuit Checks
Schematic.
Inoperative.
Fault Indicator (MIL) Malfunction
Conditions For Setting The DTC
(Control Strategy)
When air-conditioning is not working,
with air-conditioning relay control
circuit open or short to ground, the
DTC code will be set.
When air-conditioning is not working,
with air-conditioning relay control
circuit open or short to ground, the
DTC code will be set.
Conditions For Setting The DTC
(Control Strategy)
Fault indicator output state and ECM
expected status does not match.
(a) Turn the ignition switch to "ON" position.
Other fault lights normal?
Yes
Fault Locations
1. Air-Conditioning Relay
2. ECM
3. Air-Conditioning Relay Circuit
1. Air-Conditioning Relay
2. ECM
3. Air-Conditioning Relay Circuit
Fault Locations
1. Instrument Cluster
2. CAN-Bus
Go to step 3
Engine