2006 MITSUBISHI COLT Service Repair Manual

GENERAL INFORMATION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)52B-5
CAUTION LABELS
Labels to indicate cautions regarding the handling
and the services of SRS air bag are attached on the
position shown in the following illustration.
AC510120
AC206616
AC206284
AC206096AC206281
AC206097
AC400175
AC401506AC207325AC207330
AC402445
AB
A Clock spring
B
Driver's air bag module
Passenger's (front)
air bag module
SRS-ECUSunvisor
F
Seat belt with pre-tensioner
(driver's and front passenger's seat)
Hood
G Front impact sensor
IJK
Curtain air bag module
Side-airbag module
Instrument panel C
D EE
H

GENERAL INFORMATION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)52B-6
Label contents
ADANGER FLAMMABLE MATERIAL
TO PREVENT PERSONAL INJURY. DO NOT DISMANTLE, INCINERATE, OR BRING
INTO CONTACT WITH ELECTRICITY. STORE BELOW 200
°F (93°C). READ SERVICE
MANUAL FOR DETAIL.
BCAUTION: SRS CLOCK SPRING
THIS IS NOT A REPAIRABLE PART. IF DEFECTIVE, REPLACE ENTIRE UNIT
ACCORDING TO THE SERVICE MANUAL INSTRUCTIONS. TO RE-CENTRE: ROTATE
CLOCKWISE UNTIL TIGHT. THEN ROTATE IN OPPOSITE DIRECTION ROUGHLY 3
3/4 TURNS AND ALIGN ARROWS >><<.
CDANGER FLAMMABLE MATERIAL
TO PREVENT PERSONAL INJURY. DO NOT DISMANTLE, INCINERATE, OR BRING
INTO CONTACT WITH ELECTRICITY. STORE BELOW 200
°F (93°C). READ SERVICE
MANUAL FOR DETAIL.
DCAUTION:
DO NOT DISASSEMBLE OR DROP. IF DEFECT REFER TO SERVICE MANUAL.
E
WARNING
•DEATH OR SERIOUS INJURY can occur.
•ALWAYS use SEAT BELT and CHILD SEAT.
•DO NOT sit or lean unnecessarily close to the air bag.
•DO NOT place or install any objects over the air bag or between the air bag and
yourself.

WARNING
•DEATH OR SERIOUS INJURY can occur
•DO NOT place rear-facing child seat on this seat with airbag.
FDANGER: SEAT BELT PRETENSIONER
DO NOT DISASSEMBLE OR IMPACT
REFER TO SERVICE MANUAL FOR INSTRUCTIONS, HANDLING, STORAGE AND
DISPOSAL PROCEDURES.
GWARNING
THIS VEHICLE HAS AN AIR BAG SYSTEM. REFER TO SERVICE MANUAL BEFORE
SERVICING OR DISASSEMBLING UNDERHOOD COMPONENTS. READ THE "SRS"
SECTION OF MANUAL FOR IMPORTANT INSTRUCTIONS. IMPROPER SERVICE
PROCEDURES CAN RESULT IN THE AIR BAG FIRING OR BECOMING
INOPERATIVE, POSSIBLY LEADING TO INJURY.
HCAUTION:
DO NOT DISASSEMBLE OR DROP.

GENERAL INFORMATION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)52B-7
I
AC300151
JWA RNING FLAMMABLE/EXPLOSIV E
SRS AIR BAG MODULE
TO A V OID SERIOUS INJUR Y :
•DO NOT REPA IR, DISASSE MBLE OR T A MPER.
•AV OID CONT ACT WITH FLAME OR ELECTRICI T Y .
•DO NO DIAGNOSIS/USE NO TEST EQPT OR PROBES.
•STORE BELOW 200°F (93°C).
•BEFORE DOING ANY WORK INVOL V ING MODULE, READ SER VICE MANUAL
FOR IMPOR
T A N T FUR T HER DA T A .
KWA RNING
•THIS AIRBAG MODULE CAN NOT BE REP A IRED. S EE SER VICE MANUAL FOR
INSTRUCTION (ON
DIAGNOSIS AND REPLACEMENT)
•DO NOT DIAGNOSE USING ELECTRICAL L Y POWE RED TEST EQUIPMENT OR
PROBING DE
VICES.
•TA MPERING OR MISHANDLING CAN RESUL T IN PERSONA L INJUR Y .
•STORE THE REMOVED AIRBA G MODULE WITH THE P A D OR COVER SURF ACE
UP
. (RE F E R T O SER VICE MANUAL FOR SPECIAL HANDLING OR ST ORAGE.)
•DO NOT STORE ABOVE 200°F (93°C).
Label c ontent s

SYSTEM OPERATION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)52B-8
SYSTEM OPERATION
FRONT AIR BAG AND SEAT BELT WITH
PRE-TENSIONER
M2521000700059
AC313906
Frontal collision against
another vehicleor
Frontal collision against a
solid surface Analogue G-sensor
Ignition judgment
Shock
above a
certain
level
Ignition signal
SRS-ECU
Front air bag safing
G-sensor
Front impact
sensor (RH)
Front impact
sensor (LH)
AB
In case of a
front a l collision, if the front imp a ct sensor
in the
engine comp artment, th e ana logue G-sensor
in the
SRS-ECU and t he fron t air b ag sa fing sensor
simult
ane ously de tect an imp a ct th at excee d a cer
-
ta in threshold (turn ON), the SRS-ECU sen d s an
ignition
sign al to the air bag modu les (squ ibs) and
seat
belt p r e-tension e rs (squib s ) on the driver and
p
a sse nger sid e s, thus inflating the air bags an d op er
-
ating the seat be lt pre - tensioners.

SYSTEM OPERATION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)52B-9
SIDE AND CURTAIN AIR BAGS
M2521000800045
AC208121
AC206839
AC207324
Side collision against another vehicleIgnition judgment
SRS-ECU
Shock
above a
certain
level
Ignition signalCurtain air bag modules
Side-airbag modules
Side impact
sensor (RH)
Side impact
sensor (LH)
AC
Ignition signal
Side-airbag safing
G-sensor
In
case of a side co llisio n , if a n imp a ct tha t ba sed on
criteria
is simult ane ously det ect ed b y th e side imp a ct
sensors
inst alled in a centre pillar an d respectively
and by the side
-airba g sa fing G-se nsor (the senso r s
turn ON),
the SRS-ECU sends an ignition signa l to
the side-airbag modu
le an d curt ain air bag module
on the
relevant side to inf l ate them.

SYSTEM CONSTRUCTION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)52B-10
SYSTEM CONSTRUCTION
DRIVER'S SIDE AIR BAG MODULEM2521002000216
Refer to GROUP 37, Steering wheel P.37-5.
PASSENGER'S (FRONT) AIR BAG MODULE
M2521003000349
AC206612
AC206613
AC207778
AE
A
A
Section A - A
Passenger's (front)
air bag module
Air bag
Inflator
Passeng er ’ s (f ron t ) air ba g mo du le co nsist s o f t h e a i r
bag, inflat
or , and fixing b r acket s .
The air bag is made of nylon an d inf l ated by th e gas
supp
lied from the in flato r . As th e driver ’ s b ody sin ks
into t
he in flated air b ag, the air b ag deflates while dis
-
chargi ng th e gas from two side vent s to abso r b the
imp
a ct.
SIDE-AIRBAG M O DULE
M25210040 0022 3
The sid e -airbag mo dule structure is the sa me as that
for 200
1 P A JERO.

SYSTEM CONSTRUCTION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)52B-11
CURTAIN AIR BAG MODULE
M2521000500088
AC401546
AC207337AC207332
AC207338
Split hole
Burst disk 2Squib
Propellant
Burst disk 1
Curtain air bag moduleInflator
AB
High-pressure gas
The curt ain air b ag module co nsist s o f an a i r ba g, an
infla
t or , an d the f i xing ge ar rela ting to those p a rt s,
and is in
st alled in the roo f side sections (from t he
driver's an
d the p a sse nger's front p illars to the re ar
pill
ars).
The air bag is made f r om nylon with th e inside
coate
d with silico n, and housed in the roo f side sec
-
tions, folded up comp actly .
The inflato r is of a hybrid type filled wit h hig h -pres-
sure ga s (majo r compone nt: argo n). Whe n curr ent
p
a ss es t h ro ug h t h e sq ui b t o ig ni te th e ig n i t e r po wde r ,
burst
disk 1 b u rst s . T hen, th e co mbustion of the
i
gni ter powder increases the pres sure of the filler gas
to burst disk 2
, lett ing th e gas out o f the split hole.
CURTAIN AIR BAG DEPLOYMENT
IGNITION
AC304629
if an imp a ct in a side collision is de tecte d b y the rear
side
imp a ct senso r inst a lled inside a inn e r quart e r
p
a n e l an d by the side-a i rbag safing G-sen s or inte
-
grated in the SRS-ECU, the SRS-ECU se nds a n igni-
tion signal to th e squib o f th e re levant curt ain a i r bag
mo
du le. Wh en t h is ig nition sign al p a sses t h r o u g h t h e
squib, the
inflator ge nerates gas.
INFLATING
AC304630
The air bag st art s to a ppear p u shing away a he adlin-
ing.
COMPLETION OF INFLATION
AC304631
The air bag fu lly in flates to p r otect the he ads of the
occup
ant s in the fro n t and rear seat s.

SYSTEM CONSTRUCTION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)52B-12
FRONT IMPACT SENSOR
M2521005000174
AC208124
AC207331
AC207321
Front impact sensor
Front impact sensor
AC
Sensor internal circuit
Front impa ct sensor is in st alled out side o f the h ead-
lamp support p ane l in the en gine comp a r tmen t.
When th
e front imp a ct se nsor detect s an imp a ct dur
-
ing collision, the co nt a c t in the sensor turn s ON a nd
send
s out put signal to th e SRS-ECU. For d i agn osis,
the resist
an ce of the fro n t imp a ct sensor is con
-
nected in p a r a lle l with the cont act p o int.
SIDE IMPACT SENSOR
M25210060 0014 4
AC312729
AC207222
AC311719
Side impact
sensor
Side impact
sensor
Front door trim
AB
The side imp
a ct sensor is inst alled in the lower p a rt s
of th
e centre pillars an d cont ains a n an alog ue G-se n
-
sor.
The side imp a ct se nsor tran smit s cod ed acce le ration
dat
a to th e SRS-ECU. Base d on t he dat a, t he
SRS-ECU then d
e termines if th e side an d/or curt a i n
air
bags should be inflate d , a nd send s a n ignit i on sig
-
nal. The side imp a ct sen s or a l so diag nose s it s own
componen
t s , and send s a d i agno sis co de to t he
SRS-ECU if a p
r oble m occurs.