Chery A15 / 480 LHD model. Manual — part 82

Installation: to be fixed by the support of bracket
under pilot trench of front windshield. Pay attention to
waterproofing.

Functions:

Multipoint sequential injection

Controlling ignition

Idle speed control

Independent knocking control on cylinder-by-cylinder
basis (knock sensor KS-1);

Providing sensors with power supply: 5V/100mA

Adopting cylinder-detecting signal (Phase sensor PG1)

λclosed-loop control with self-adaptation

Controlling carbon canister control valve

Air conditioning switch

Engine-fault indicating lamp

Fuel quantitative correction

Engine speed signal output (TN signal)

Speed signal input

Failure self-diagnosis with flash code function

Accepting engine load signal

Troubleshooting: due to the fact that ECU (electric
control unit) has low failure rate, so generally it is not
advisable to replace ECU for troubleshooting on any
problem. Failure of components such as periphery
circuit and sensors shall be checked and solved firstly.
Do not replace ECU until all periphery components
are confirmed to be fault-free.

Description of pins of ECU:

Pin

Connection point

Type

Pin

Connection point

Type

1

Heated oxygen sensor

Output

42

A/C temperature sensor

Input

2

Ignition coil 2

Output

43

3

Ignition ground wire

Ground

44

Non-sustained power

supply

Input

4

45

Non-sustained power

supply

Input

5

Ignition coil 1

Output

46

Carbon canister Valve

Output

6

Fuel injector 4 (the 2

nd

cylinder)

Output

47

Fuel injector 3 (the 4

th

cylinder)

Output

7

Fuel injector 2 (the 3

rd

cylinder)

Output

48

8

Output of engine speed

signal

Output

49

9

50

Control of low speed fan

Output

10

51

Electronic ground 2

Ground

11

52

12

Sustained power supply

Input

53

Electronic ground 1

Ground

13

Ignition switch

Input

54

14

The main relay

Output

55

15

Engine rotary sensor A

Input

56

16

Throttle position sensor

Input

57

A/C compressor switch

Input

17

Sensor ground 1

Ground

58

18

Oxygen sensor

Input

59

Speed signal

Input

19

Knock sensor A

Input

60

20

Knock sensor B

Input

61

Power ground 1

Ground

22

63

Non-sustained power

supply

Input

23

64

Phase angle sensor D of

step motor

Output

24

65

Phase angle sensor A of

step motor

Output

25

66

Phase angle sensor B of

step motor

Output

26

67

Phase angle sensor C of

step motor

Output

27

Fuel injector 1 (1

cylinder)

Output

68

Control of high speed fan Output

28

69

Fuel pump relay

Output

29

Inspection light

Output

70

A/C compressor relay

Output

30

71

Diagnostic K wire

I/O

31

72

32

5V power supply 2

Output

73

33

5V power supply 1

Output

74

34

Engine rotary sensor B

Input

75

A/C switch

Input

35

Sensor ground 3

Ground

76

Blaster switch

Input

36

Sensor ground connector

2

Ground

77

Headlight switch

Input

37

Air intake pressure

sensor

Input

78

38

79

Phase angle sensor

Input

39

Temperature sensor of

engine coolant

Input

80

Power ground connector

2

Ground

40

Temperature sensor of

air intake

Input

81

41

※Electrical fuel pump

Function: Supply the fuel from the fuel tank to the
engine at required pressure and flow (vary from
individual system).

Structure and working principle: The electrical fuel
pump is comprised of direct current motor, vane pump
and end cover (integrated with non-return valve, release
valve and anti-electromagnetic interference elements).
The pump and the motor are mounted on the same shaft
and sealed in the same house. The pump and motor are
surrounded by the gasoline for cooling and lubrication.
The battery supplies power to the electrical fuel pump
through the fuel pump relay and the pump relay
switches on the circuit of the electrical fuel pump only
during start-up and operation of the engine. If the
engine stops running due to malfunction, the fuel pump
will stop operation automatically. The maximum
pressure at exit of the electrical fuel pump is
determined by the release valve within the range of
450-650 kPa. However the pressure of the whole fuel
system fluctuates along with fluctuation of the air
intake manifold pressure. The difference between the
system pressure and the air intake manifold pressure,
which normally is 350kPa, is determined by the fuel
pressure regulator.

Note: The temperature of fuel has a large impact on
performance of the fuel pump. When running under
high temperature for a long time, if the fuel temperature
is higher than a certain temperature, the pressure of the
fuel pump will be decreased rapidly. So please check
carefully whether the performance of the fuel pump
under high temperature is good if the engine fails to hot
start.

Pins: The electrical fuel pump has two pins connecting
to the fuel pump relay. Beside these 2 pins there are
marks of “+” and “-” on the shell of the fuel pump
respectively, which represent the positive and negative
grid.

The 70# pin of ECU controls the fuel pump relay.

Electrical fuel pump

Circuit diagram of the electrical fuel
pump

Troubleshooting: The common malfunctions of the
fuel pump are representation of insufficient fuel
pressure, not pumping fuel and so on. It shall be
verified firstly in troubleshooting that the fuel pressure
is within rated range and the pipeline is leaked. In
addition both the positive and negative pressure of the
fuel tank will have impacts on the fuel system.

※Solenoid fuel injector

Function: The fuel injector supplies atomized fuel to
the engine through injecting the fuel within the required
time according to the demand from the ECU.

Structure and working principle: The ECU sends the
electrical pulse to the fuel injector coil for generate a
magnetic force. If the magnetic force is increased
enough to overcome the composite force of the release
spring pressure force, the gravity force of needle valve,
and the friction force, the needle valve will begin to
rise and the fuel injection will start. The maximum lift
range of the needle valve is no more than 0.1mm.
When the fuel injection pulse ends, the pressure force
of the release spring will make the needle valve close
again.

Notes on installation: Only the specific connector can
be used in the fixed fuel injector and shall not be
mixed.

For the convenience of installation it is recommended
that the upper O ring connected to the fuel distributor
pipe shall be coated with silica-free clean oil. Pay
attention not to make oil contaminate the inside of the
fuel injector and the injection hole.

Place the fuel injector in the fuel injector base in
vertical direction and fasten the injector on the base by
the clasp.

Note: As for the car not being used for a long time, it is
possible that such car can not start properly because the
coagulation of fuel in the fuel injector. Under such
circumstance verify carefully that the fuel injector is
coagulated.

Fault diagnosis: The electrical injection system of A15
RHD car can conduct fault diagnosis on the driving
stage of the fuel injector in stead of conducting fault
diagnosis on its self. If the driving stage of the fuel
injector is short or overloaded to the battery power