–

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 

temperature 

sensor

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

•

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.

Engine

Control System JL4G15-D

2-599

2.12.4 Component Locator
2.12.4.1 Component Locator

1

4

3

2

FE02-8041b

Legend

1. Acceleration Pedal Position Sensor
2. Electronic Throttle Body (ETC) Assembly
3. Intake Air Pressure / Temperature Sensor

4. Electronic Control Module (ECM)

2-600

Control System JL4G15-D

Engine

2.12.5 Disassemble View
2.12.5.1 Disassemble View

6

5

4

3

2

1

10

9

8

7

FE02-8042b

Legend

1. Throttle Valve Retaining Bolts
2. Throttle Valve
3. Throttle Drive Motor Retaining Bolts
4. Throttle Drive Gear
5. Seal Plate
6. Seal Plate Retaining Bolts

7. Throttle Body
8. Throttle Drive Motor
9. Throttle Position Sensor
10. Throttle Position Sensor Retaining Bolts

Engine

Control System JL4G15-D

2-601

2.12.6 Schematic
2.12.6.1 Schematic

Engine 
Control 
Module

1. 12V Battery Voltage
2. 12V Ignition Power Supply
3. 12V Power Ground
4. 5V Sensor Power Ground
5. Ignition Module Driver Ground
6. Intake Air Pressure Temperature Sensor
7. Acceleration Pedal Position Sensor
8. Throttle Body Position Sensor
9. Engine Coolant Temperature Sensor
10. Pre-catalytic Oxygen Sensor
11. Post-catalytic Oxygen Sensor
12. Crankshaft Position Sensor
13. Camshaft Position Sensor
14. Knock Sensor
15. Vehicle Speed Sensor
16. Air Conditioning Request Signal
17. Air Conditioning Pressure Signal
18. Braking Signal
19. Theft-deterrent Signal
20. CAN and Serial Data Communication

1. 5V Reference Voltage
2. Ignition Coil Control
3. Fuel Injector Control
4. Electronic Throttle Body Motor Control
5. Fuel Pump Relay Control
6. Evaporative Canister Solenoid
7. VVT Solenoid Control
8. Air Conditioning Clutch Relay Control
9. Cooling Fan Low Speed Relay Control
10. Cooling Fan High Speed Relay Control
11. Pre-catalytic Oxygen Sensor Heating 
Control
12. Post-catalytic Oxygen Sensor Heating 
Control
13. CAN Communication
14. Serial Data Communication

FE02-5218b

2-602

Control System JL4G15-D

Engine