Airbag Control Module Description; Operation - Dodge Sprinter 2006 Manual

8O - 8 RESTRAINTS
r est r a in t syst em is fu n ct ion in g n or m a lly a n d t h a t t h e
r epa ir s a r e com plet e. If t h e a ir ba g in dica t or fa ils t o
ligh t , or ligh t s a n d st a ys on , t h er e is st ill a n a ct ive
su pplem en t a l r est r a in t syst em fa u lt or m a lfu n ct ion .
Refer t o t h e a ppr opr ia t e dia gn ost ic in for m a t ion t o
dia gn ose t h e pr oblem .
NOTE: If the Airbag Control Module (ACM) has been
replaced with a new unit, it will be necessary to ini-
tialize the new ACM. In order to function properly,
the ACM must be programmed for the correct stan-
dard and optional supplemental restraint system
components installed in the vehicle. To initialize the
ACM, a diagnostic scan tool is required. Refer to
the appropriate diagnostic information.
AI RBAG CON T ROL M ODU LE
DESCRIPTION
Fig. 6 Airbag Control Module
1 - AIRBAG CONTROL MODULE
2 - LABEL
3 - ORIENTATION ARROW
4 - CONNECTOR RECEPTACLE
Th e Air ba g Con t r ol Modu le (ACM) is secu r ed wit h
t h r ee scr ews t o t h e t op m ou n t in g su r fa ce of a
st a m ped st eel br a cket t h a t is welded on t o t h e floor
pa n el wit h in t h e sea t r iser u n der n ea t h t h e dr iver
side fr on t sea t in t h e pa ssen ger com pa r t m en t of t h e
veh icle (F ig. 6). A m olded pla st ic pr ot ect ive cover is
in st a lled over t h e ACM a n d secu r ed wit h in t egr a l
sn a p fea t u r es t o a fla t m et a l ba se pla t e sa n dwich ed
bet ween t h e bot t om of t h e ACM a n d t h e m ou n t in g
br a cket on t h e floor pa n el (F ig. 7). Th is cover is
design ed t o sh ield t h e ACM a n d it s wir e h a r n ess con -
n ect ion fr om ot h er elect r ica l com pon en t s a n d wir in g
loca t ed wit h in t h e sea t r iser a r ea ben ea t h t h e dr iver
sea t , a n d m u st a lwa ys be r ein st a lled followin g ser-
vice r em ova l.
Fig. 7 ACM Bracket
1 - ACM BRACKET
2 - SEAT RISER
3 - EYELET TERMINAL
4 - ACM CONNECTOR
5 - FLOOR PANEL
Con cea led wit h in a h ollow in t h e cen t er of t h e die
ca st a lu m in u m ACM h ou sin g is t h e elect r on ic cir-
cu it r y of t h e ACM wh ich in clu des a m icr opr ocessor,
a n elect r on ic im pa ct sen sor, a n elect r on ic sa fin g sen -
sor, a n d a n en er gy st or a ge ca pa cit or. A st a m ped
m et a l cover pla t e is per m a n en t ly secu r ed t o t h e bot -
t om of t h e ACM h ou sin g t o en close a n d pr ot ect t h e
in t er n a l elect r on ic cir cu it r y a n d com pon en t s.
An a r r ow pr in t ed on a la bel on t h e t op of t h e ACM
h ou sin g n ea r t h e r ea r pr ovides a visu a l ver ifica t ion
of t h e pr oper or ien t a t ion of t h e u n it , a n d sh ou ld
a lwa ys be poin t ed t owa r d t h e fr on t of t h e veh icle.
Th e ACM h ou sin g h a s in t egr a l m ou n t in g fla n ges on
t h r ee cor n er s. A m olded pla st ic elect r ica l con n ect or
r ecept a cle con t a in in g n u m er ou s t er m in a l pin s is in t e-
gr a l t o t h e left fa cin g side of t h e ACM h ou sin g. Th ese
t er m in a l pin s con n ect t h e ACM t o t h e veh icle elect r i-
ca l syst em t h r ou gh a dedica t ed t a ke ou t a n d con n ec-
t or of t h e veh icle wir e h a r n ess.
Th e im pa ct sen sor in t er n a l t o t h e ACM a r e ca li-
br a t ed for t h e specific veh icle, a n d a r e on ly ser viced
a s a u n it wit h t h e ACM. In a ddit ion , t h e ACM m u st
be elect r on ica lly pr ogr a m m ed for t h e cor r ect st a n -
da r d a n d opt ion a l su pplem en t a l r est r a in t syst em
com pon en t s in st a lled in t h e veh icle. Th e ACM ca n n ot
be r epa ir ed or a dju st ed a n d, if da m a ged or fa u lt y, it
m u st be r epla ced.
OPERA TION
Th e m icr opr ocessor in t h e Air ba g Con t r ol Modu le
(ACM) con t a in s t h e su pplem en t a l r est r a in t syst em
logic cir cu it s a n d con t r ols a ll of t h e su pplem en t a l
r est r a in t syst em com pon en t s.
On -Boa r d Dia gn ost ics (OBD) a n d ca n com m u n ica t e
wit h a dia gn ost ic sca n t ool u sin g a dia gn ost ic Ser ia l
VA
Th e ACM u ses