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47-0
SUPPLEMENTAL RESTRAINT (SRS)
HOT IN RUN AND START
YEL
0.35
DK BLU
0.35
YEL
0.5
WHT
0.5
TAN
0.5
DK GRN
0.5
BLK/WHT
0.8
BLK/WHT
0.35
BLK
3
G302
BLK
5
G102
BLK
3
YEL
0.5
WHT
0.5
YEL
0.5
WHT
0.5
TAN
0.5
DK GRN
0.5
TAN
0.5
DK GRN
0.5
BLK/WHT
0.35
BLK/WHT
0.35
Data
Lines
B5
E
C311
Connector
B
A
D
C311
Connector
B6
B8
B7
J
K
C304
Connector
Ignition 1
voltage
Ground
Serial
data
class 2
Seatbelt
switch
driver
signal
Side
impact
sensor-
left-
voltage
P
C304
Connector
A15
SEAT BELT
BUCKLE
SWITCH-
DRIVER
Connector
INFLATABLE
RESTRAINT
SIDE IMPACT
SENSOR
(SIS)-LEFT
BLK/WHT
0.8
See Ground
Distribution,
page 14-6.
A18
F5
C2
FUSE
BLOCK-
UNDERHOOD
Connector
Case
ground
Side
impact
sensor-
left-sig-
nal
Side
impact
sensor-
right-
voltage
Side
impact
sensor-
right-
signal
SIR
Fuse 18
10A
A1
A4
L
M
D
E
C500
Connector
D
E
C600
Connector
INFLATABLE
RESTRAINT
SIDE IMPACT
SENSOR
(SIS)-RIGHT
A
B
See Ground
Distribution,
page 14-1.
INFLATABLE
RESTRAINT
SENSING AND
DIAGNOSTIC
MODULE
(SDM)
Connector
B
A
Circuit Schematic
47-1
SUPPLEMENTAL RESTRAINT (SRS)
BRN
0.35
TAN
0.35
DK GRN
0.5
YEL
0.5
YEL
0.5
A12
A11
ELECTRONIC
FRONTAL
SENSOR
(EFS)-LEFT
Connector
C5
C4
A14
D7
D6
C101
Connector
A13
Discriminating
sensor
left signal
INFLATABLE
RESTRAINT
SENSING AND
DIAGNOSTIC
MODULE
(SDM)
Connector
Steering
wheel
module
stage
1-high
control
Side impact
module-left-
high control
INFLAT-
ABLE RE-
STRAINT
STEERING
WHEEL
MODULE
COIL
INFLAT-
ABLE RE-
STRAINT I/P
MODULE
Connector
A2
A1
ELECTRONIC
FRONTAL
SENSOR
(EFS)-RIGHT
Connector
A7
A6
B2
B1
A8
A3
B3
B4
C2
C1
C4
C3
A
B2
B1
B
A
A2
A1
B2
B1
Discriminating
sensor
left -low
reference
Discriminating
sensor
right signal
Discriminating
sensor
right -low
reference
Steering
wheel
module
stage
1-low
control
Steering
wheel
module
stage
2-high
control
Steering
wheel
module
stage
2-low
control
IP
module
stage
1-high
control
IP
module
stage
1-low
control
IP
module
stage
2-high
control
IP
module
stage
2-low
control
Side impact
module-left-
low control
Side impact
module-
right-high
control
Side impact
module-
right-low
control
GRY
0.35
YEL
0.5
YEL
0.5
WHT
0.35
PNK
0.35
YEL
0.35
ORN
0.35
GRY
0.35
PPL
0.35
DK GRN
0.35
DK GRN
0.35
BRN
0.35
GRY
0.35
DK BLU
0.35
BRN
0.35
GRY
0.35
DK BLU
0.35
GRY
0.35
DK GRN
0.5
N/A
N/A
A2
A1
N/A
N/A
B2
B1
C203
Connector
INFLAT-
ABLE RE-
STRAINT
STEERING
WHEEL
MODULE
Connector
A
B
A
B
Shorting
Clip
C1
Connector
INFLATABLE
RESTRAINT SIDE
IMPACT MODULE -LF
INFLATABLE
RESTRAINT SIDE
IMPACT MODULE -RF
Shorting
Clip
TAN
0.5
WHT
0.5
Stage 1
Stage 2
PNK
0.5
BRN
0.5
A
B
C3
A
B
Shorting
Clip
Shorting
Clip
Stage 1
Stage 2
Shorting
Clip
C2
Shorting
Clip
B
Circuit Schematic
47-2
SUPPLEMENTAL RESTRAINT (SRS)
120Ć3
The supplemental inflatable restraint (SIR) system
supplements the protection offered by the occupant’s
seat belt system. The SIR system may contain several
inflator modules located throughout the vehicle, i.e.
steering wheel module, instrument panel (IP) module,
side impact modules, or roof rail modules. In addition to
inflator modules, the vehicle may contain seat belt
pretensioners that tighten the seat belt in the event of a
collision, thus reducing the distance between the
occupant and the seat belt when an inflator module is
deployed. Each inflator module has a deployment loop
that is controlled by the sensing and diagnostic module
(SDM)
mounted
inside
the
vehicle.
The SDM
determines the severity of a collision with the
assistance of various sensor inputs located at strategic
points on the vehicle. When the SDM detects a collision
of sufficient force it will process the information
provided by the sensors to further support air bag
deployment. The SDM performs continuous diagnostic
monitoring of the SIR system electrical components.
Upon detection of a circuit malfunction, the SDM will set
a DTC and inform the driver by turning the AIR BAG
indicator ON. The steering column and knee bolsters
are designed to absorb energy and compress during
frontal collisions in order to limit leg movement and
decrease the chance of injury to the driver and
passenger.
After an Air Bag deployment, the SDM will send out a
post-air message to the Rear Integration Module (RIM)
through the class 2 serial data circuit. The RIM will
unlock the doors and turn ON the interior lights 15
seconds after receipt of this message.
Circuit Operation
47-3
SUPPLEMENTAL RESTRAINT (SRS)
(Refer to Section 201 for photographs.)
Component
Photo No.
Electronic Frontal Sensor
(EFS)-Left
Left side of front frame
. . . . . . . . . . . . . . . . . .
Electronic Frontal Sensor
(EFS)-Right
Right side of front frame
. . . . . . . . . . . . . . . .
Fuse Block-Underhood
Left side of engine compartment
3
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflatable Restraint I/P
Module
Above I/P compartment
77
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflatable Restraint Sensing
and Diagnostic Module
(SDM)
Beneath the lower console
87
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflatable Restraint Side
Impact Module-LF
In the left front seat back
117
. . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflatable Restraint Side
Impact Module-RF
In the right front seat back
117
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflatable Restraint Side
Impact Sensor (SIS)-
Left
In the left front door
97
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflatable Restraint Side
Impact Sensor (SIS)-
Right
In the right front door
97
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflatable Restraint Steering
Wheel Module
In center hub of steering wheel
68
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflatable Restraint Steering
Wheel Module Coil
In center hub of steering wheel
. . . . . . . .
Seat Belt Buckle Switch-
Driver
In the seat buckle assembly
119
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector
C101 (38-BLK)
Left side of engine compartment
3
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C203 (4-YEL)
Lower right side of I/P
77
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C304 (16-BLK)
Under carpet, rear floor area
103
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C311 (10-BLK)
Lower front of driver’s sea
117
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C500 (12-BLK)
Midpoint of leading edge of left front door
93
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C600 (12-BLK)
Midpoint of leading edge of right front door
93
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
G102
Left side of engine compartment
4
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G302
On the lower left B-pillar
105
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Location Index
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