Chery Fora (Elara A520). Manual - part 188

ABS System

for the cars with no ABS, when forcibly steps down the brake pedal

during driving, the wheel speed will decrease suddenly. Once the brake force is more than the
friction between wheels and floor, wheels will be braked. The wholly braked wheels will decrease
the friction between tire and floor, if the front wheels have braked, driver can hardly control the
running direction of the car; and if the rear wheels have braked, the car will swing. The ABS is
used to restrain the skidding phenomenon of wheel specially. It will supervise the speed of each
wheel and control the hydraulic pressure when braking. This can enable the driver to keep the
stability of direction and help the car possess better steering capability. The circuit diagram is
shown as figure 10-1.

The voltage of the 30th wire supply to the 31st pin of ABS control unit via the 40A fuse Sb4;

The voltage of the 30th wire supply to the 2nd pin of ABS control unit via the 40A fuse SB5; The
voltage of the 15th wire supply to the 32nd pin of ABS control unit via the 5A fuse Fb1.

Th e 12 13

26 27

42 43

44 of ABS control unit connec t to the F/L

F/R

R/L

R/R wheel speed sensor respectively; when the wheel runnin g, the sensor

produces voltage signal which changes with the increase of speed.

Th e 6th pin of ABS contro l unit connect to the brake switch signal; the 16th、45th pin

of ABS control unit connects to g round.

Th e 3rd pin of ABS control unit connect to CAN-H wire, an d connects to the 30th pin

of combi nation instrument、 62nd pin of engine ECU respectively. The18th pin of A BS
control unit connec ts to CAN -L wire,

and connects to the 29th pin of combination

instrume nt、81st pin of engine ECU respectively.

、

Circuit analysis:

30
15

A CC1

ACC2

ILLUM

FB1

SB4
40A

SB5
40A

ABS Control module

41 42

16 45

CAN_ H

CAN_L

L/W

V /W

Y/B

W/B

B B

To The

Brake Switch,

ECU21#,

Front ISU PE2 22#

ECU/Front

Ground/4

Front/Rear

1/14

ECU/Front

Ground/3

Front/

Rear 6

ECU/Front

Ground/12

Front/Rear

1/15

ECU/Front

Ground/ 11

Front/
Rear 17

ECU/Front

Ground/15

ECU/ Front

Ground/7

ECU/Front
Ground/8

ECU/Front

Ground/16

Left

Wheel

S peed Sensor

Front

W heel

Speed Sensor

Front R ight

④ ④

Rear Right Wheel

Sens or

Speed

Rear Left

Wheel

Sensor

Speed

Rear Right

Wheel

Sensor

Speed

R ear L eft Wheel

Sensor

Speed

Figure10

ABS System

-1

Circuit

Installation position ofABS control assembly

Position of ABS control m odule

ABS brake down parts

Brake lamp switch

Brake pedal

ABS control unit

Hydraulicpressure

pump electromotor

Sensor

Control unit

Execute parts

ABS warning indicator lamp

Self-diagnosis connector

Front wheel speed sensor

Rear wheel speedsensor

ABS hydraulic pressure unit with

low pressure reservior

El ectroma gnetic valve

30
15

ACC1

ACC2

ILLU M

FB4

Driver Airbag

Left Impact

Sensor

Driver side

Airbag

To ISU PE2/16

To Istrument 24#

1
2

16
17

To Diagnostic Connector 7#

To Instrument 17#

F ront E ngine Com partm ent
E lectri cal Bo xL9

In strum ent/F ront Grou nd/14

In strum ent/A irbag /A

Driv er Sid e Airb ag

L/R

L/W

G/B

Fr ont Passenger

Airbag Lock Switch

8
9

37
12

G
G/W

Tempor arily Use less

P/B

Instr umen t/

Airb ag/C

In strum ent/F

ro nt

G roun d/B10

Br /W

Front Passen ger
Side Airbag

Right
ImpactSensor

Front
Passenger
Side Airbag

3
4

23
24

18
19

Pa ssenger S ide Airbag

O/B
O/G

O
O/W

S piral

C able

Airbag System

Figure11-1

Circuit

Airbag System

30
15

ACC1

ACC2

ILLUM

The circuit of airbag is shown as figure 11-1.
When there is serious frontal crash, to avoid the driver or front

passenger bumping onto the steering wheel or instrument panel, there will
be an airbag expand on the steering wheel and instrument panel so as to
protect the driver and front passenger.

The SRS（ Airbag system） include: driver side airbag module、

passenger side airbag module、airbag control module、helix cable、wiring
harness and SRS fault warning lamp.

When the ignition switch is set at the position of ON or ST, the

voltage of battery supply to the 25th pin of SRS control module via FB4 fuse.

The 2nd、 1st pin of the airba g module are connectted to the

front driver side airbag via helix cab le; the 17 th、16th pin of airb ag
module are conn ectted to the driver side airb ag directly; the front
passenger side airbag conn ect to the 3rd、 4th pin of airbag module
directly; the passenger sid e airbag c onnect to the 18th、 19th pin of
airbag module di rectly; the 21st、22 nd、23rd and 24th pin of airb ag
module connect to the side airbag crash sensor. The 12nd、37th pin of
airbag module connect to pa ssenger side airbag lock.

The 10th pin of the airbag module output the airbag warning signal,

it connects to the 17th pin of instrument; the 47th pin of the airbag
module output the side airbag warning signal, it connects to the 24th pin
of instrument; when the ignition switch is at the position of ON, the SRS
warning lamp in the instrument panel flash for 6s with the frequency of
1Hz and then off. If the SRS warning lamp didn't flash for 6s or it keeps
shining , Taht's to say the SRS system is not in good working condition

Spiral Cable

Driver Airbag

Belt

f ty

Airbag Control

circuit analysis:

Fron t P as seng er Airb ag Lo ck S witch

F ront Passe nger Side Airbag

Sefty Bel t

Auto A/C System

3 0

ACC1

ACC2

1LLUM

F b13

30 A

To The

High/Low Voltage

Switch 1 # and 4# Of Air

Conditioner

To The

Diagnosis

Port 7#

Tem perature C ontrol

Motor

L14

I nst rum en t/

A irC onditioner/11

I nst r um ent/ F

r on tG round/ A4

Blower Spee d

Co ntrol Module

Figure12-1

Circuit Diagram

Air Conditioning System

Br/W

Br/Y

B13

B1 5

Lg /B

Inte rnal & Exte rnal

Circulat ion Control Motor

G/R

B 6

G /W

V/B

V /W

A1 7

B10

A ir Conditi oner Controller

Fb7

10 A

Instrum ent/A ir

Condi-tioner/6

T Wiper

motor 2#

ECU/A2/4

G20

T FRONT

ISU PP3

15#

T FRONT

ISU PE1

28#

A nti-Theft

Indicator

L ightLine

External

Temperature

Sensor

Fr ont Gr oun d/F ron t

En gineCom part ment /D

Sunlight Sensor

Ins trument/Air

Condit ioner/ 2

Instrum ent/A ir

Condit ioner/15

Instrument/

Front Ground/15

Instrument/F

ron t Ground/b6

To Instrument

To Wiper

Switch 9#

Instrument /Air

Conditioner /14

Ins tr um e nt/F ront

Gro und/ B10

Instrum ent /A ir

Co nd itio ne r/1 2

Ins trum e nt/A ir

Con di-ti oner/ 1

Internal

Temperature

Sensor

A 9

A1 0

B1 6

A 15

A1 8

A19

R/W

Y/ Br

Y/R

Y/G

Y/W

A14

Y/O

O/W

Mode Control

Motor

B 3

A 1

A16

L/B

V/Y

L/W

Inte rnal & Extern al

Circula tion Control Motor

Blower Sp eed Control M odule

Coolant

Temperat-
ure Sensor

Y/ B

B11

A11

V/R

Air Conditio ner Controlle r

Sunlight Sensor

Temp erature Senso r

Coolant Temperat ure Sensor

T FRONT

ISU PE2

32#

I nstr um en t/

F ro nt G r oun d/B 11

I nstr um en t/ A ir

C ond iti oner /8

B1 4

2 4

The Auto A/C is shown as figure12-1. When the ignition switch is at the position of ON, the

ACC1 and the 15th wire gets electricity.

The 15th line supplies power to the B1 pin of A/C controller via Fb7 fuse; the

pin of A/C controller connect to ground.

、

、、

、

A18 A2

B2 B9 B10 B16

The voltage of ACC1 wire supplies power to the 5th pin of blower speed adjusting module

via the Fb13 fuse; the 7th、8th pin of blower adjusting module is connected to the blower motor;
the 6th pin connects to ground; the 3rd pin is the blower speed adjusting signal, and connects to the
A5 pin of A/C controller; the 2nd pin is the blower voltage feedback signal, and connects to the A4
pin of A/C controller.

The B5、B6 pin of A/C controller connect to inner/outer circulation control motor, the

control panel drives the circulate wind door connecting pole、 move pole by the control of
inner/outer circulation servor motor , and also move the big、 small wind door and thereby it
realize the control of inner/outer circulate wind.

The B7、B8 pin of A/C controller connect to the cool/warm control motor, the control

panel drives the dial and the pole in the temperature adjusting unit by controlling the blend door
servor motor, and also move the blend door and thereby it realized the different proportional air
mixture.

The B3、B4 pin of A/C controller connect to the mode control motor, the control panel

drives the dial and the pole in the wind direction adjusting unit by controlling the mode wind door
servor motor, different pole control the open and close of different wind door and thereby it realizes
the control of air.

The A18 pin of A/C controller connects the outer temperature sensor. The outer

temperature sensor is one of the important sensor of auto A/C. It will influence the air temperature
of the wind outlet port、wind volume of the wind outlet port、the position of mode door and the
position of air intake port. For the inspection of outer temperature, you can dismantle the
connector of the sensor and test the DC voltage of the the front ground/front engine
compartment/D end of the wiring harness, the normal value is 5V, if not, that's to say there is
something wrong with the wiring harness or A/C computer.

The A15 pin of A/C controller connects the inner temperature sensor. The inner

temperature sensor is one of the important sensors of auto A/C.It will influence the air temperature
of the wind outlet port、wind volume of the wind outlet port、the position of mode door and the
position of air intake port. For the inspection of inner temperature, you can dismantle the
connector of the sensor and test the DC voltage of the two ends of the wiring harness, the normal
value is 5V, if not, that's to say there is something wrong with the wiring harness or A/C computer.

The A14 pin of the A/C controller connects to the coolant temperature sensor. The coolant

temperature sensor is to test the temperature of heater core and modify the position of the blend door.

It can avoid the working of compressor when the engine is in high temperature; it can also

Auto A/C System Circuit Analyse：

control the blower, when the coolant temperature is too low, the system will start the preheat
control. That's to say when the coolant temperature is too low and it is in warming working
condition , to prevent the cool wind from blowing out, if the coolant temperature is lower than the
system set temperature, the blower will work in low speed or doesn't work.

The A19 pin of A/C controller connects to sunshine sensor. The sunshine sensor induce the

the strong or weak of the sunshine to modify the position of blend door and speed of blower. To
inspect the sunshine sensor, you can read fault code or in the way of testing the resistance or voltage.

Test in strong sunshine, th e resistan ce will be 4kΩ , cover the sunshine sensor, the

resist ance will be ∞.

The voltage in strong sunshine is norm ally lower than 1V, cover the sunshine s ensor, the

voltage will be over 4V.

（1）Test the resistance

（2）Test the vol tage

V /B

V/W

L/B

V/Y

L/W

V/R

lower S peed

Control Module

B 7

A17

A16

A11

Air Conditioner Controller

Tem perature Co ntro l

Motor

Mode Co ntrol

Moto r

Temperature Control Motor

Mode Cont rol Motor

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