out and connector of th e vehicle wir e harness located
with in the dr iver side front sea t riser.
The seat belt switch cannot be adjusted or r epair ed
and, if fault y or da maged, th e entire driver side seat
belt bu ckle unit must be repla ced.
OPERATION
The seat belt switch is designed t o control a pa th
to groun d for the seat belt switch sen se input of the
Elect ro-Mechanica l Instrument Cluster (EMIC). The
seat belt switch contact is a ctuated by th e seat belt
lat ch plate being inser ted in to the buckle. When t he
seat belt lat ch plat e is inserted into th e buckle far
enough t o be enga ged by th e sea t belt buckle latch,
the switch leaf conta ct opens the seat belt switch
sense cir cuit groun d path; and, wh en the seat belt
lat ch pla te is released and extracted from th e sea t
belt buckle latch the switch leaf cont act is released,
closing the circu it to ground.
The sea t belt switch is connect ed is series between
ground and t he sea t belt swit ch sense input of t he
instr umen t cluster. The seat belt switch receives
ground at a ll tim es thr ough its pigtail wire connec-
tion to the vehicle wir e harness fr om an other ta ke
out of the veh icle wire ha rness. An eyelet terminal
connect or on the vehicle wire ha rness ground t ake
out is secured un der a n ut to a gr ound stud loca ted
on the floor panel wit hin t he driver side front seat
riser. Th e seat belt switch may de diagnosed using
conven tional diagn ost ic tools and m ethods.
SEAT BELT T EN SI ON ER
DESCRIPTION
Front seating position seat belt t ension ers supple-
ment the stan da rd driver a nd option al pa ssen ger air-
bags for all ver sions of th is model. When equipped,
the seat belt t ension er is int egra l to the front sea t
belt and ret ractor units, which ar e secu red t o the
inner B-pillars of the vehicle (Fig. 38). Each ret ract or
is concealed benea th the m olded plastic B-pilla r trim.
The seat belt tension er con sists primar ily of a t ubu-
lar steel housing, a pist on, a ca ble, a torsion bar, and
a small pyrotech nica lly act ivated ga s gen erat or. All of
these com pon ents are loca ted on one side of t he
retr actor spool on the outside of the retra ctor housing
except for th e torsion bar, which serves as the spin-
dle u pon wh ich th e ret ractor spool rotates. The seat
belt tension er is controlled by t he Airba g Control
Module (ACM) and is connected to the vehicle elec-
trical system thr ough a dedicated take out of t he
vehicle wir e harness by a keyed, snap-fit molded
plastic connect or insulat or to ensur e a secur e connec-
tion.
The seat belt tensioner ca nnot be repair ed and, if
faulty or damaged, the entire front sea t belt and
retr actor u nit m ust be replaced. If t he fron t air bags
have been deployed, the seat belt ten sioner s have
also been deployed. The sea t belt tensioner is n ot
intended for reu se an d m ust be replaced following a
Fig. 38 Seat Belt Tensioner
1 - TURNING LOOP
2 - LATCH PLATE
3 - LOWER ANCHOR
4 - RETRACTOR
5 - TENSIONER
8O - 32 RESTRAINTS VA
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