Chery B11. Manual - part 90

Chapter Two. Anti-lock Brake System (ABS/DDRP) 
 
Section One. General Description 
One. Maintenance precautions 
The following precautions shall be taken 
during maintenance of the ABS to avoid 
its damage.  
1. Detach the electronic brake control 
module wire harness from the electronic 
brake control module prior to welding.  
2. As ABS components are especially 
sensitive to EMI (electromagnetic 
interference), it is necessary to pay 
special attention to the wiring, location, 
installation and alignment of all ABS 
components as well as their wiring, tie-
ins, clamps and brackets, etc. 
3. Do not start the engine or charge the 
battery that is still connected with the 
rapid charger as it will possibly disable 
the battery or damage ABS components.  
4. Turn off the ignition switch to 
disconnect the battery.  
5. Turn off the ignition switch to detach 
the electronic brake control module wire 
harness from the electronic brake control 
module.  
6. Do not modify but replace any ABS 
component.  
7. Do not hang the suspension 
component onto wheel speed sensor 
wires which will be surely damaged.  
8. Do not place the electronic brake 
control module where the temperature is 
higher than 85 ℃ (184 ℉).  
9. Use neither petroleum base liquid in 
the brake cylinders nor the petroleum 
base liquid containers because petroleum 
will bulge and deform the rubber 
components in the hydraulic brake 
system to allow water into the system 
and reduce the boiling point of liquid.  
 
 
 
 

Two. Abbreviations and definitions 
ABS: anti-lock brake system 
B+: power source 
BPMV: brake pressure modulator valve 
CKT: circuit  
DDRP: distribution of electronic braking 
power 
DLC: data link connector 
DMM: digital multimeter 
ECU: electronic control unit 
EBCM: electronic brake control module 
EMI: electromagnetic interference 
HCU: hydraulic control unit 
IP: instrument panel  
LDM: lamp driver module 
PCM: power control module 
TCS: tractor control system 
WSS: wheel speed sensor 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Section Two. Description and 
maintenance of ABS components and 
functions 
 
Description 
The DBC7.0 ABS aims to reduce the 
wheel skidding to the minimum on the 
principle that the ABS monitors the 
speed of each wheel and controls the 
hydraulic power applied onto each wheel 
during braking so that the driver may 
maintain steering stability and realize 
better steering performance.  
One. Fixing and unfixing the ABS 
1. Precautions during unfixing 
(1) Identify the faults with a diagnostic 
instrument before repairs.  
(2) Unpack the spare parts only before 
fixing.  
(3) Only the original manufacturer’s 
components are allowed.  
(4) Pay attention to the cleanness during 
maintenance and wipe with non-wool 
fabrics.  
(5) Clean the surface with detergents that 
contain no minerals before maintenance. 
(6) Do not use compressed air or move 
the car when the system is on.  
(7) Plug all hydraulic outlets properly 
after dismantling the ABS assembly.  
(8) Unfix other components that may 
interfere with the work.  
(9) Please use DOT4 brake fluid and do 
not use mineral oil.  
(10) Soak the sealing members and O-
rings with the brake fluid but not engine 
oil or brake grease.  
(11) After maintenance, please check the 
operation of regular brake system and 
ABS.  
(12) Check if there is any leakage in the 
hydraulic joints.  
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

2. Unfixing the DBC7.0 ABS assembly  
(1) Turn off the ignition switch and 
detach the negative wire of the storage 
battery.  
(2) Step down the pedal (>60mm) and 
secure it to close the central valve of the 
master pump so that the brake fluid will 
not outflow from the outlet when the 
system is on.  
 
 
 
 
(3) Release the ABS computer plug-in 
safety protection.  
 
 
(4) Pull the plug-in to the left and take 
down the ABS plug-in.  
 
 
 
 
(5) Unfix the six brake pipes of ABS 
master pump and mark accordingly. Plug 
the pipe immediately.  
 
 
 
(6) Unfix the set bolts on the master 
pump and take down the master pump.  
 
 
3. Replacing the hydraulic control 
unit 
(1) Release the four set bolts on ABS 
computer.  
Note: do not use the released set bolts.  
Screwing torque: 4-6N.m 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 

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(2) Isolate the hydraulic control unit and 
the electronic control unit.  
 
 
 
 
 
 
(3) Fix the new hydraulic control unit 
onto the electronic control unit.  
 
 
 
 
 
 
(4) Fix the ECU onto the hydraulic 
control unit with new screws.  
 
 
 
 
4. Replacing the hydraulic control 
unit 
(1) Release the four set bolts on ABS 
computer.  
Note: do not use the released set bolts.  
 
 
(2) Isolate the hydraulic control unit and 
the electronic control unit.  
(3) Fix the new hydraulic control unit 
onto the electronic control unit.  
(4) Fix the ECU onto the hydraulic 
control unit with new screws.  
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 

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