Chery A series. Manual - part 122

 

CENTRAL LOCK SYSTEM 

SYSTEM DESCRIPTION 

The Chery sedan A15 employs a complete electronic control central lock system. The central 
lock system is consisted of one 4-wire type controlling module, three supplemental door lock 
actuating motors and one luggage boot cover actuating motor. The lock and unlock of the 
interlock mechanism for the central lock system are all controlled by the driver side door lock 
switch. The central door lock module is installed in the driver side door panel. 

 
 
PRINCIPLE OF CENTRAL DOOR LOCK CONTROL 
The 4# pin of the central control module provides the normal power supply to the S18 30A 
fuse, the 2# pin is grounded, and the 1# and 3# pins are linked to the actuating motor 
respectively. When the driver side door lock switch is turned to “OFF” position, the car is 
locked; when the driver side door lock switch is turned to “ON” position; the car is unlocked. 
 

 

FAULT DIAGNOSIS AND TROUBLESHOOTING 

1. ALL THE DOOR LOCKS DO NOT FUNCIONT 

Malfunction symptoms： 

1) When the driver side door lock switch is locked, all the doors are not locked. 

2) When the driver side door lock switch is unlocked, none of the doors is unlocked. 

Malfunction reasons： 

1) The S18 30A fuse for the normal power supply of 30# terminal is broken; 

2) The circuit connecting the central door lock module to the S18 30A fuse is faulty; 

3) Poor grounding; 

4) The central door lock module is faulty. 

Troubleshooting 

Firstly, verify that the 30# terminal connected to the normal supply S18 30A fuse is open or 
the 12V power supply. If there is no 12V power supply or the fuse is not open, check the 
circuit for the malfunction. If there is a 12V power supply, verify that there is a 12V power 
supply in the circuit from S18 30A fuse to the 4# pin of the central door lock module. If there 
is no 12V power supply, there is a malfunction in the circuit. If there is a 12V power supply, 
verify that the 2# pin of the central door lock module is grounded or not. If it is not grounded, 
there is a malfunction in the circuit. If it is grounded, there is malfunction in the central door 
lock module, and the central door lock module should be replaced. 

2. NONE OF THE CENTRAL DOOR LOCKS CAN BE UNLOCKED 

 

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Malfunction symptom： 

1) None of the central door locks can be unlocked after closing the door. 

Malfunction reasons： 

1) Malfunction in the central door lock module. 

Troubleshooting 

Replace the central door lock module. 

3. NONE OF THE CENTRAL DOOR LOCKS CAN BE LOCKED 

Malfunction symptom： 

None of the central door locks can be locked after opening the door. 

Malfunction reasons： 

Malfunction in the central door lock module. 

Troubleshooting 

Replace the central door lock module. 

4. THE RATED RESISTANCE FOR THE MOTORS OF ALL THE CENTRAL DOOR 
LOCKS 

Main central door lock motor (driver side) 315Ω; 

Side door motor 20Ω; 

Luggage boot cover motor 10Ω; 

When the resistance range is exceeded or the resistance value is equals to infinity Ω, please 
replace the resistor of the central door lock. 

 

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AIRBAG SYSTEM 

PRINCIPLE OF SRS SYSTEM 

When the vehicle collision happens, the collision 
between the vehicles or between the vehicle and the 
barrier is called the first collision. After the first 
collision, the vehicle speed changes rapidly. The 
driver and the passengers will move forward due to 
the inertia, and will collide with the steering wheel, 
windshield or instrument dashboard etc. This 
collision is called the second collision. The main 
reason that caused the driver’s injury in the accident 
is the second collision. In order to reduce or avoid 
the driver’s injury in the second collision, the vehicle 
has installed with the passive protection devices of 
seat belt and safety airbag. The airbag is an option 
for the Chery sedan A15 RHD, and the airbag model 
employed is Dongfangjiule. 

The purpose of the airbag design is: During the short 
period between the first and the second collisions 
(50ms), quickly insert an airbag between the driver 
and the interior structures of the car, as shown in the 
Figure: 

The driver’s head and chest will press on the air 
filled cushion. The air bag can absorb the kinetic 
energy aroused by the inertia of the human body by 
the damping effect of itself so as to protect the 
personal safety. 

The airbag system is a kind of safety device used 
together with the seat belt. 

The airbag can not replace the function of the seat 
belt. 

The driver must put on the seat belt at all time and 
adjust the seat belt to a proper tension. 

 
 
 
 
 

Activated airbag system 

 
 

 

 

 

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 OPERATION CONDITIONS 

----The airbag system will function under the 

following conditions: 

1) When the vehicle is collided with a 

stationary object with a speed over 
25Km/H, the airbag will be activated. 

2) When two vehicles have a head-on 

collision both with a speed over 25Km/H, 
the airbags of the two vehicles will be 
activated. 

3) When one vehicle is parked, and anther 

vehicle is collided with it face to face with 
a speed over 50Km/H, the airbags of the 
two vehicles will be activated. 

4) Collision within the included angles of 30

o 

from the left and right of the vehicle. 

----The purpose of SRS is to protect the driver 

during a serious head-on collision. If the 
external force is coming from the included 
angle within 30 degree of the vehicle 
centerline, the airbag will be activated.   

----Note: The above vehicle speed is referring 

to the speed measured by the sensor, not 
the actual speed of the vehicle. The speed 
measured inspected by the sensor is 
related with the actual speed, bumper 
performance results and the crossbeam 
deformation. 

 
 

 
 

OPERATION PROCESS 

----The activation process of the airbag. 

 

 

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