Chrysler 1997 Stratus Convertible LHD, Service Manual, Page: 546 / 1196

8W-43 AIRBAG SYSTEM
INDEX
page page
DESCRIPTION AND OPERATION
AIRBAG CONTROL MODULE (ACM) . . . . . . . . . . 4
AIRBAG IMPACT SENSOR . . . . . . . . . . . . . . . . . . 4
AIRBAG SQUIB (AIRBAG IGNITER) . . . . . . . . . . . 4
AIRBAG WARNING LAMP . . . . . . . . . . . . . . . . . . 4
HELPFUL INFORMATION . . . . . . . . . . . . . . . . . . . 4
DESCRIPTION AND OPERATION
AIRBAG CONTROL MODULE (ACM)
Two different circuits supply battery voltage from
the junction block to the Airbag Control Module
(ACM), they are F14 and F23. The F14 and F23 cir-
cuits are connected to separate bus bars internal to
the junction block. Different circuits from the Power
Distribution Center (PDC) and the ignition switch
supply battery voltage to the junction block bus bars.
The F23 circuit supplies battery voltage to the ACM
only when the ignition switch is in the RUN position.
The F14 circuit powers the ACM when the ignition
switch is in either the START or RUN position.
A bus bar internal to the ignition switch connects the
A1 circuit from the Power Distribution Center (PDC) to
the A21 circuit when the switch is in either the START
or RUN position. The A21 circuit supplies battery volt-
age to the junction block bus bar that feeds the F14 cir-
cuit. A 20 amp fuse in the PDC, cavity 8, protects the
A1 and A21 circuits. A 10 amp fuse in cavity 17 of the
unction block protects the F14 circuit.
When the ignition switch is in the RUN position, it
connects the A2 circuit from the PDC to the A22 cir-
cuit. The A22 circuit supplies battery voltage to the
junction block bus bar that feeds the F23 circuit. A
40 amp fuse in cavity 18 of the PDC protects the A2
and A22 circuits. A 10 amp fuse in cavity 16 of the
junction block protects the F23 circuit.
The ACM has a case ground and an external dedi-
cated ground, circuit Z6. The dedicated ground con-
nects to the floor pan near the ACM.
The ACM is also interfaced with the CCD Bus. Cir-
cuit D1 is used for CCD (+), and circuit D2 is used
for CCD (-).
AIRBAG IMPACT SENSOR
The Airbag system uses a sensor internal to the
Airbag Control Module (ACM) to detect impact. For
information regarding operation of this sensor, refer
to the appropriate group of the Service Manual.
AIRBAG SQUIB (AIRBAG IGNITER)
DRIVER’S SIDE AIRBAG
Two circuits, R43 and R45, connect the Airbag Con-
trol Module (ACM) to the driver’s side Airbag squib
(igniter) after passing through the clock spring con-
nector. Circuit R43 from cavity 4 of the ACM 4-way
connector connects to the squib. Circuit R45 from
cavity 3 of the ACM 4-way connector connects to the
squib. R43 and R45 are a twisted pair of wires.
PASSENGER’S SIDE AIRBAG
Two circuits, R42 and R44, connect the Airbag Con-
trol Module (ACM) to the passenger’s side Airbag
squib (igniter). Circuit R42 from cavity 2 of the ACM
4-way connector connects to the squib. Circuit R44
from cavity 1 of the ACM 4-way connector connects
to the squib. R42 and R44 are a twisted pair of wires.
AIRBAG WARNING LAMP
Illumination of the Airbag warning lamp is con-
trolled by the Body Control Module (BCM) and the
CCD Bus. When the Airbag Control Module (ACM)
detects a problem in the system it sends a signal on
the CCD Bus to the BCM. The BCM process the sig-
nal and illuminates the AIRBAG lamp in the instru-
ment cluster.
HELPFUL INFORMATION
•
Check for blown fuses in the circuits that con-
nect to the ignition switch and in those that connect
to the ACM
•
While the bus bars in the junction block power
the ACM, they also feed additional components on
separate fuse-protected circuits
•
The ACM has a case ground and an external
dedicated ground. The dedicated ground connects to
the floor pan near the ACM
8W - 43 - 4 8W - 43 AIRBAG SYSTEM
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