Geely EC718 2009 Workshop Manual page 681

Engine
– Full-throttle Air-Conditioning Off Mode: Ensure the vehicle
dynamic.
Engine speed is less than 3,600 rpm
No TPS fault
TPS is greater than 105%, and since the last time full-
throttle air-condition-off the TPS is less than this value
– Engine Speed Too High Air-Conditioning Off Mode: Protect
the Air-Conditioning system.
A/C off, the engine speed is less than 4,900 rpm, the
compressor is allowed to start.
A/C on, the engine speed is greater than 5,100 rpm, the
compressor is off.
–
Engine Coolant Temperature Too High Air-Conditioning Off
Mode: Protect the engine.
A/C off, when the coolant temperature is less than 106°C
(223°F), the compressor is allowed to start.
A/C on, when the coolant temperature is higher than 108°C
(226°F), the compressor is off.
– Air-Conditioning Evaporator Temperature Too Low Air-
Conditioning Off Mode: Protect the Air-Conditioning
system.
Air-Conditioning evaporator
malfunction
Air-Conditioning evaporator temperature is less than 3°C
(37°F)
2.12.3.8 Canister Solenoid Valve Control
Canister solenoid valve controls the amount and time the fuel
vapor enters in cylinders by controlling the passage between
the Canister and intake manifold opening and closing timing,
therefore maximizing the vehicle emissions, while minimizing
the impact on engine performance.
1. Canister solenoid valve working conditions
In order to reduce the amount of fuel vapor entering into the
cylinder affecting the combustion, following conditions must be
met before the Canister solenoid valve is open:
– System voltage is less than 18 V and more than 8 V
– Engine coolant temperature is higher than 0°C (32 ºF)
– Engine intake air temperature is higher than 0°C (32 ºF)
– No Related System Malfunctions
• Fuel System Malfunction
•
Fuel Pump Malfunction
temperature sensor
Control System JL4G15-D
• Idle Speed Too High / Too Low
• Intake Air Pressure Sensor Malfunction
•
Engine Misfire
• Pre-Catalytic Oxygen Sensor Heating Malfunction
• Pre-Catalytic Oxygen Sensor Signal Malfunction
• System Voltage Too Low / Too High
•
Crankshaft Position Sensor Malfunction
•
Ignition Coil Malfunction
• Fuel Injector Malfunction
• Canister Solenoid Valve Output Malfunction
2. Operating Mode
Canister solenoid valve opening is determined by ECM
according to the duty cycle (PWM) signal. In the non-idling
state, the maximum Canister solenoid valve opening is
determined by the close-loop air flow with a maximum 100%.
2.12.3.9 Fault Self-diagnosis and Protection
Function
When the system is working and the engine is running, ECM
controls all system components working, and monitors
components directly connected to it. When one or more
components are in abnormal working conditions, the system
will automatically set an alarm. Each fault condition has a
corresponding unique DTC code and once the fault occurs, the
system will sends output signal corresponding to this code
through the datalink connector. The engine malfunction
indicator lamp will be lit to alert the driver to repair. DTC code
indicates a possible malfunction component.
When a malfunction occurs, the system controls the engine
using temporary emergency program to ensure that the vehicle
can be driven to a repair station for repair.
EC718/EC718RV EC715/EC715RV 10/2009
2-599