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8O - 22
RESTRAINTS
SIDE IMPACT AIRBAG
CONTROL MODULE
DESCRIPTION
Fig. 25 SIACM POSITION/ORIENTATION
1 - VEHICLE BODY B-PILLAR
2 - SIDE IMPACT AIRBAG CONTROL MODULE (S.I.A.C.M.)
3 - S.I.A.C.M. ELECTRICAL CONNECTOR
4 - SEAT BELT RETRACTOR ASSEMBLY
5 - S.I.A.C.M. RETAINING SCREWS
Vehicles equipped with side impact airbags use two
Side Impact Airbag Control Modules (SIACM). One is
located on each respective side body B-pillar (Fig.
25).
OPERATION
Each Side Impact Airbag Control Module (SIACM)
serves as the impact sensor for its seat mounted air-
bag. The right side SIACM controls the right seat
airbag (Fig. 26). The left side SIACM controls the left
seat airbag (Fig. 26). Each SIACM contains two
accelerometers, both accelerometers must agree in
order to deploy the side airbag. In the event of a side
impact the appropriate SIACM will send a electronic
signal to its airbag, deploying the airbag. The SIACM
communicates with the occupant restraint controller
via the PCI bus circuit.
REMOVAL
(1) Disconnect and isolate the battery negative
cable remote terminal.
(2) Remove the lower B-pillar trim from the appro-
priate side of the vehicle. Refer to Body, Interior,
B-Pillar Lower Trim, Removal.
(3) Disconnect the side impact airbag control mod-
ule electrical connector (Fig. 25).
(4) Remove the SIACM retaining screws and
remove the module from the vehicle (Fig. 25).
INSTALLATION
(1) Position the SIACM in B-pillar and install the
retaining screws (Fig. 25). Torque the screws to 12
N·m (105 in. lbs.).
(2) Connect the SIACM electrical connector (Fig.
25).
(3) Install the lower B-pillar trim. Refer to Body,
Interior, B-Pillar Lower Trim, Installation.
WARNING: DO NOT CONNECT THE BATTERY NEG-
ATIVE CABLE REMOTE TERMINAL. REFER TO
ELECTRICAL, RESTRAINTS, DIAGNOSIS AND TEST-
ING - AIRBAG SYSTEM FIRST.
LH
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