airbag sensor VOLKSWAGEN JETTA 2008 Owners Manual

Booklet 1.1 Maintenance
Service at 20,000 miles (32,000 km) -ALL MODELS
• En gin e: C hange o il and oil filter
• En gin e: C hec k for leaks
• Exhau st system: Chec k for dam age and le ak s
• Water separat or: Drain water (TOI engin e
o nl y)
• Fuel filt er: Replace (T OI engine only)
• Batte ry: C heck
• Door ch eck stra p s: Lubri cate
• Dust and polle n fi lter (w here applicable) :
R epl ace
• Coo ling sys te m : C heck coolant leve l; ad d if
n ecessa ry
• Windshi eld was he r: Chec k fluid l evel; add if
n ecessary
• Automa tic sh ift l oc k: Check operation in­
cludin g park /n eut ral/safe ty sw itch
• Auto mati c tran smi ssi on: Chec k for leak s
• Manual tran smi ssion : Chec k oil leve l; acid if
n ecessa ry; check fo r leak s
• Whee ls: Ro ta te from front to rear
• Tires/s pare w hee l: Chec k condition and
pr ess ure
Next Service :
D at e: .. .... ......... .........
M iles/ km: ...................
w hi ch eve r occurs first •
Brake syste m : C hec k fo r dam age /leak s, brak e
p ad thi ckne ss an d br ake flu id l eve l
• Drive s haf ts : C he ck boots
• On-Board diagno sti c sys te m: Check faul t
m em ory ; p urg e if necessa ry
• Hoof fr am e: C lea n
lubri cate
• Front axle : C hec k dust seals on ba ll joint s and
t ie rod end s; c hec k tie rod s
• Head lig ht s: A djust
• Rear spoil er: Lubri cate (Ne w Beet le only)
• 12 V start er and auxili ary batt ery: c h eck
(w here app licable )
• Airbag system: Visua l c h eck eve1y
12 month s
r e ga rdless of mileage ( kil om ete rs)
• Roa d te st: Check kickclo wn, brakin g,
s tee ring, heatin g and ve ntil ation, air co nd i­
ti oni ng, po we r acc esso ries and elec trica l sys­
t e m s
• Tires: Check trea d dep th , ad just tir e press ure
i f n ecessary.
• Tire pr ess ure m onit oring sys te m sensors:
C hec k batt ery char ge. re pl ace w hee l ele ctron ics
and aluminum valve if necess ary (where appli­
cab le).
T oda y·s date a nd Volk sw agen Dea ler sta mp
Se rvic e at 25,000 mil es (40,000 km) -Model s with a 1.8T engin e
ONLY
• En g in e: Chan ge oil and oil filter
Next Service:
Date : ........... ..... ... .... .
M iles/ km: .. ..... ........... .
10 Warranty Voucher

Booklet 2.1 Safety first
WARN ING (cont inued)
justm ent ran ge, as far away from th e a irbag as
po ssi ble before insta llin g th e fo rwar d-facin g
c hild re straint. The backr est mu st be adju sted
t o a n u prig ht po sition .
• Alway s make sure that nothing pr events
the front p assenger's sea t from being moved
to the rea rm ost positi on in it s fo re and aft ad ­
ju stm ent range .
• Neve r pl ace add itional it em s on th e s eat
that can in crease the tota l we ight regis tered b y
WARN ING (cont inu ed)
the weig ht-se nsi ng m at and can cause injury
in a cras h.
• Make sure that the PASS ENGER AIR BAG
OFF light come s on and stays on all th e time
w henever the ig niti on i s sw itched on.
• l fthe PASSENGER AIR BAG OFF light docs
not come on an d stay o n, imm edia tely insta ll
th e fo rwa rd-faci ng child seat in a rea r sea ting
position and have the a irb ag sys te m inspec ted
by your Volk swage n dealer. •
Advanced Airbag System components
The front passe nger seat in you r ve hicle has lot
of ve ry im por tant parts of th e Adva nce d Airbag
Syste m in it. The se parts includ e 1he weight­
se nsing mat , senso rs, wir in g, bracke ts, a nd
more. The functio n of the sys te m in th e front
passenger seat is chec ked by th e e lectron ic con ­
t rol unit when th e ig niti on i s on. The contro l uni1
monitor s th e A dva nce d Airbag Syste m and turn s
th e a irbag indicator lig h t on when a malfun ction
in th e syste m co mp on ent s is det ected. The func­
t ion o f th e airb ag indica tor lig ht i s desc ribed in
g reater detail below. Beca use the front pas­
se nge r sea t co ntain s imp ort ant parts of the Ad­
va nc ed Airbag System, you must t ake care to
p reve nt it from being damaged. Damage to 1h c
sea t ma y pre vent th e A dva nce d Airb ag for
fron t passenge r se at f rom doing it s job in a
c ras h.
Th e front Advanced A irbag Syste m consis ts of
the following:
• Cras h se nsors in th e front o f 1h e ve hicle 1hat
m eas ure vehicle acce lera tion/d ecelera tio n to prov ide inform arion to the Advanced Airbag
Sys te m abou t th e seve rity of t he crash.
• An electro nic co ntrol unit, wit h in tegra te d
cras h se nsor s for fron t an d side impacts. The
co ntro l uni t "'decides ·· w hether to
just o ne or
bot h stages of the fron t airbags based on th e
form atio n receive d from the crash sensors . T he
contro l unit also "decides·· whether the safe ry
belt pretens io ners s ho uld b e act ivated .
• A dual -stage Advanced Airbag
g en ­
era tor for th e dr ive r in sid e the stee ring whe el
h ub.
34 Airbag system
• A dua l-stage Advanced A irbag and gas ge ner­in side t he instrument panel fo r the fro nt
pass enger .
•
we ig ht-sens ing m at und er the upholster y
padding of the front passenge r sc at cushion that
m easures th e tot al we igh t o n the scat. The info r­
mation registe red is se nt cont inuousl y to the
e lectro nic contro l unit to re g ul ate deployment
of t he front Advance d Airbag on the passenger
si de.
•
airbag monitoring system and indicator
li ght in the in stru ment clus te r 39 .
• The PASSENGER AIR BAG OFF light in the
cente r of the instrument pa nel
39 , 25) that te lls yo u when th e fro nt Adva nced
A irb ag on the passe nger si de ha s been turned
off.
• A se nso r below the safety be lt lat ch for the
fro nt sca t pa ssenger to m eas ure the tens io n on
t h e safe ty belt. The
on t he safe ty be lt and
the weig ht reg is te re d by 1h e we igh t-se nsi ng m at
h elp t he control unit "'d ec ide" whe th er the fr ont
airbag fo r th e fro nt p assenger seat sh ould be
t urned off or no t
29, "Ch ild restra int s on
t h e fr o nt sea t - so me impo rtan t thin gs to kn ow··.
• A se nso r in the sa fety belt la tc h for the driver
an d for the front sca t passenger that senses
whe th er that safety belt is latc hed or
and
t ransm its thi s in form ation to t he e lectroni c con­
tro l unit.
Lr!, WARNING
Damage to the fron t pa sse nger se a t ca n pre­
ve nt the airba g from worki ng pr oper ly.

Booklet 2.1 Safety first
i s poss ible an airba g not d epl oy a
se ating p osition where th e s afely belt is being
u se d
will inflat e at the pos ition where b elt is noc be ing use d. It i s thal
nothin g im erfer e belt bu ck les so
th al th e se nsors can se nd corr ect in forma ­ab oul safe ty be lt use th e e lec troni c co n­
t ro l
WARN ING
Chan gin g th e ve hicle's suspension including
use of unapproved tire-rim combinations can
c hange Advan ced Airbag performanc e and in­
creas e th e risk of serious persona l inju ry in a
c ra sh.
• Never install sus pens ion co mpon ents that
do not have the same performance characte r­
i st ics as the components originally installed
on yo ur vehicle.
• Never u se tire -rim combination s that h ave
not been approved by VOLKSWAGEN.
Side airbags
Applies to vehicles: with side airbags
Description of side airbags
WARNING
Leaving the optiona l safety belt extender at ­
t ached to the safety belt latch on the front pas­
senger seat when the safety belt is not bein g
u sed w ill prevent the Advanced Airbag System
fr om funct ion ing proper ly and can increa se
th e r isk of se rious perso nal injur y in a co lli­
sio n.
• Alway s remove the sa fety belt exte nder
when it is 1101 n ee ded a11d stu w i I safe ly it is not bein g used with the safet y belt.
• Nev er use th e safe ty belt extender to sec ure
a chi ld restraint at any seating positi on.
WARN ING
Item s stored between the safe ty be lt buckle
and the center co nso le can ca use th e sensor s
in the buckle to send the wro ng information to
elec troni c control module and preven t the
Advanced A irbag system from working prop­
er ly.
• Always make s ure that nothing can inter ­
fere with th e safety belt buckl es a nd that they
a re not obstructed.
Th e sid e airba g system ca n provide supplem ental prot ection to prop erl y re­
s train ed fron t seat o ccupan ts.
Fi g. 26 Side airbag in driver seot
44 Airbag system
The sid e airba gs are in paddin g in fro nt seats 26 . Yo ur vehicl e m ay a lso be
eq uipped with optional sid e airb ags for th e re ar
p os itions. Th e gen eral l ocatio n is
id entifi ed b y th e wo rd in th e uppe r re­
g io n of the b ackres ts
The side airb ag sys tem basica lly co nsis ts of:
• The elec troni c control m odul e and ext ernal
s id e imp act se nso rs
• The two sid e airba gs loc ated in the sid es o f
ch e fro nt b ackre sts
• Th e airba g warning
in cluste r

The airbag system is monitored electronically 10 make cenain i t is functio ning properly all
t ime s. Each time you turn o n th e ig ni tion,
airbag system indica to r lig ht w ill co me on for a
few seco nds (self diagnost ics).
T he side airbag syste m sup pleme nts rhe safety
be lts and can help to reduce the risk of inj ur y
the dr iv er's a nd front passe nger's upper torso on sid e of th e vehicle that is stru ck in a sid e co l­
li sion. The airbag inflate s on ly in sid e impa cts
and onl y when the veh icle acce leration reg is­
t e red b y the control unit is high en ough. If
rate is below reference value programm ed
i n to co ntr ol u ni t, t he side airbag s not be
trigg ere d , eve n though the ca r ma y be badly
damag ed as a r esult of the co llision. It is
pos ­
s ible d efin e an airbag trigger ing rang e th at
w ill cover eve ry possible ang le of impact, sin ce
t h e ci rc u ms ta n ces will vary co nsiderably be­
twee n one collision and anot her. lrnpona nl fac­
include, for example, the na tu re (har d or
s oft ) of th e impacting objec t, a ngle of im­
pact, vehicle speed, etc. 46, "Impo rta nt
s afet y in structio ns for the side a irbag system ".
As ide from th eir normal safety function, saf ety
belts
to h elp k eep the dri ver or front pas­
senger in posit io n in a side colli sio n so th e
s id e airb ags can prov ide prot ection whe n
inflate. Safe ty belt s also help to keep rear seat
pas seng ers in po sition so that optional rear seat
s id e airbag s can prov ide protection in a sid e co l­
li sio n i n w hic h th e side air b ag inflates.
T he a irbag syste m is not a subst itute for your
safety belt. Rather, it is part of t he overa ll occu­
pant re straint syste m in your vehicle. A lways re­
memb er
the airbag syste m can only help to
pro tec t yo u if you are wearing your safe ty b elt
and wearing
properly. This is an other rea son
why you sho uld alwa ys wear your safe ty belt s,
n o t ju st b ecau se th e
re quir es you do so 13 , bel ts" .
It is im portant 10 re mem be r that wh ile th e su p­
p lemen tal side airbag system is designed to help
Booklet 2.1 Safety first
reduce the likelih ood of seriou s injuri es, other
injuries, for example, swelling, bruising, and
mi nor abra sions can a lso be associated w it h
th ese airbags. Remember t oo , side airbags w ill
dep loy o nly once an d on ly in certai n kinds of ac­
ciden ts - your safety belt s are always th ere to
offer protec tion.
Ve hicle dam age, repa ir cost s or even
lack of
ve hicle da mag e is no t necessa rily a n indicatio n
of prope r airbag operation. In some collis ions,
both front and side airbag s may inflate. Re­
mem ber too, tha t airbag s w ill dep loy only once
a n d only in certain kind s of collis io ns - your
safety belt s ar e always there to offer protection in
t h ose acciden ts in whic h ai rb ags a re not sup­
po sed to deploy or whe n
have al ready de­
p loye d.
Th e side airbag sy stem
will not b e trigg ere d
• if th e igni tion is sw itc hed off,
• in side collisions when
accelerat ion mea­
s ured by th e sensor is too low ,
• in front-en d co llisio ns,
• in rear -end collisions,
• in rollove rs.
In some types of accidents
Sid e Cur­
tain Pro tection and sid e airbag s may be tr ig­
gered together.
WARNING
• Safety belt s a nd lh e a irb ag sys te m will onl y
p rov ide prot ectio n when occ upant s a re in the
co rrec t se atin g po sition
13, "Safety
b elt s" .
• If the air b ag in dicator light comes o n when
the vehicl e is bein g use d, h ave the sys te m in­
spec te d imm edi ate ly by yo ur Vol kswage n
d eal er. Th e side a irb ag sys te m m ay not wor k
prop erl y eve n wh en th e vehicle acce le ratio n
in a side colli sion i s high en ough
10 ac tiva te
th e a irbag
Airbag system 45

Booklet 3.2 Tips and Advice
Repairs and technical modifications
Repairs and modifications must always be carried out according to the manufac­
turer's specifications
Unauthorized modifications to th e e lectronic
component s or software in the vehicle may
cause
E lectro nic comp o­
nents are linked toget her in networks and other
sys tems may be nega tive ly affected by improper
m odificat ions or improperly installed accesso ­
ries. Thi s can se riously impair safety and lead to
excessive wear o f components.
Changing the vehicle's sus pens io n system can
change the way that the Advanced
Sys tem performs in a crash. For example, usin g
t ir e-rim combinations not approved by Volk­
swagen, lower ing the vehicle, changi ng the stiff­
ness of the suspension, including the spring s,
suspension struts, shock absorbers can chan ge
the forces that are measured by the airbag sen­
so rs and sent to the con trol unit. Some su spen­
s ion changes can, for exa mpl e, incr ease the force
levels measured by the sensors and make the
airbag system dep loy in crashes in which it
wou ld not deploy if the changes had not been
made. Other kinds of changes may reduce the
force levels measured by the sensors and pre­
vent the airbag from deploying when it sho uld.
We recommend that all necessary work be per­
formed by an authorized Volkswagen deale r
using genuine Volkswagen parts ®.
WARNING
Imp roperly performed modifications or other
work that is not properly performed on your
ve hicle can cause malfunctions leading to ac­
cidents and serious pe rsonal injury.
• Never install suspension components that
d o not have the same performance character­
i stics as the components originally installed
on your vehicle. Never use tire-r im comb ina­
tions th at have not been approved by Volk­
swage n.
WARNING
Improper care, servicing and repa ir proce­
dures can increase the risk of personal injury
a nd death by preventing an a irbag from de­
p lo ying w hen needed or deploying an airbag
unexpected ly.
• Chang ing th e vehicle's su spens ion in­
cluding use of unapproved t ire- rim combina­
tions can change Advanced Ai rbag perfor­
mance and increase the risk of serious per­
sona l inju ry in a crash.
• Be sure to read and heed the info rmatio n
a n d all WARN INGS
2. 1 "Safety
fir st", c hapte r "Airbag
28 Acc essories, new part s, repairs and modification s