Chery A21 2005, Service Manual, Page: 271 / 475

30
15
ACC1
ACC2
31
ILLU M
31
FB4
5A
Driver Airbag
Left Impact
Sensor
Driver side
Airbag
To ISU PE2/16
To Istrument 24#
25
1
2
21
22
16
17
48
11
47
To Diagnostic Connector 7#
To Instrument 17#
46
10
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
R
G
Driv er Sid e Airb ag
G
Gr
L
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
V
Br /W
B
11
Front Passen ger
Side Airbag
Right
ImpactSensor
Front
Passenger
Side Airbag
3
4
23
24
18
19
Pa ssenger S ide Airbag
B
R
O/B
O/G
O
O/W
S piral
C able
Airbag System
Figure11-1 Circuit Airbag System
30
15
ACC1
ACC2
31
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
Se Belt f ty
Airbag Control
circuit analysis:
Fron t P as seng er Airb ag Lo ck S witch
23
F ront Passe nger Side Airbag
Sefty Bel t