Chery A15. Manual - part 28

Specification: 

Voltage: 12V 

Resistance: 13.8 ~ 15.2Ω± 10%（ on 23°C） 

Remark: Force on fuel injector socket in assembly and disassembly must be less 

than 120N, or it will influence function.

 

 

Caution 

·use of a deformed injector retaining clip will cause the injector to not engage 

correctly. Always use a new clip when reattaching the injector, otherwise it may 
cause the injector to rotate.

 

 

 

 

F-26

ENGINE ELECTRONIC SYSTEM 

INPUT / OUTPUT COMPONENTS OF CONTROL SYSTEM … …… … … … …G-2 

WORKING MODULE TABLE OF FUEL INJECTION / IGNITION SYSTEM …G-3 

WORKING PRINCIPLE …    …… … … … ……    …… … … … ……    …… … …G-4 

ELECTRICAL CONTROL UNIT ……  …… … … … ……  …… … …………G-5 

WORKING PRINCIPLE OF ELECTRONIC FUEL INJECTION CONTROL AND 

ACTUATORS  …………………………………………………………………………G-7 

BASIC PRINCIPLE OF MALFUNCTION DIAGNOSIS FOR ELECTRONIC FUEL 

INJECTION SYSTEM ………………………………………………………………G-21 

DETAILED TABLE OF MALFUNTION DIAGNOSTIC CODE …………………G-24 

PROCEDURES FOR FAULT DIAGNOSIS ACCORDING TO THE SYMPTOMS OF 

THE ENGINE …… …… …… … …… …… …… …… …… …… …… ……G-62 

SAFETY PRECAUTIONS OF SYSTEM MAINTENANCE ………………………G-88 

SAFETY PRECAUTIONS IN DIAGOSIS AND MAINTENANCE OF THE 

GASOLINE INJECTION ELECTRONIC CONTROL SYSTEM …………………G-88 

SAFETY MEASURES ……………………………………………………………G-89 

 

 

 

 

             

 

G-1

INPUT / OUTPUT COMPONENTS OF CONTROL SYSTEM 

 
 
 

 

19

18 

Diagnostic 
connector 

 
 
 

1 

Engine ECU 

11 Fuel injector 

2 

Air pressure / temperature sensor 

12 Oxygen sensor (heater) 

3 

Engine speed sensor for top dead center 

13 Fuel pump 

4 

Throttle valve position sensor 

14 Carbon canister solenoid valve 

5 

Knock sensor 

15 Two step speed fan controller 

6 

Coolant temperature sensor 

16 Compressor relay control 

7 

Oxygen sensor (

λ signal) 

17 Idling speed step motor 

8 

Air condition request 

18 Diagnostic connection 

9 

Ignition coil and spark plugs 

19 Relay 

10 Instrument 

panel 

   

 

G-2

WORKING MODULE TABLE FOR FUEL INJECTION / IGNITION 

SYSTEM 

 

Power supply relay

Power supply 

(Power supply  +12V)

Power supply 

(15/54) 

Fuel pump 

A/C relay 

Idling speed step motor

Malfunction 
indicator 

Fuel injector

Ignition coil 

Carbon canister 

solenoid valve 

E

ng

in

e 

E

N

G

IN

E

 

Coolant temperature sensor

Throttle valve 

position sensor

Line K

 

Air pressure / 

temperature sensor

Knock sensor 

·

Cooling temperature

overheat alarm light

·

Decoder alarm light

·

R.P.M. meter

 

TDC/rotate speed sensor

Heated Oxygen sensor heater

Oxygen sensor heater

Fan relay 

 

 

G-3