Acura RSX Honda Integra. Manual — part 474
01
S6M6A00H46400000000CAAT00
SRS Components
Airbags
Side Airbags
Seat Belt and Seat Belt Buckle Tensioners
OPDS
23-28
SRS
System Description
A
B
G
H
I
J
C
D
E
F
E
F
The SRS is a safety device which, when used with the seat belt, is designed to help protect the driver and front
passenger in a frontal impact exceeding a certain set limit. The system consists of the SRS unit, including safing
sensor and impact sensor (A), the cable reel (B), the driver’s airbag (C), the front passenger’s airbag (D), side airbags
(E), seat belt tensioners (I), and front impact sensors (J). Since the driver’s and front passenger’s airbags use the same
sensors, both normally inflate at the same time. However, it is possible for only one airbag to inflate. This can occur
when the severity of a collision is at the margin, or threshold, that determines whether or not the airbags will deploy.
In such cases, the seat belt will provide sufficient protection, and the supplemental protection offered by the airbag
would be minimal.
The side airbags (E) are in each front seat-back. They help protect the upper torso of the driver or front seat passenger
during a moderate to severe side impact. Side impact sensors (F) in each door sill and in the SRS unit detect such an
impact and instantly inflate the driver’s or the passenger’s side airbag. Only one side airbag will deploy during a side
impact. If the impact is on the passenger’s side, the passenger’s side airbag will deploy even if there is no passenger.
The seat belt and seat belt buckle tensioners are linked with the SRS airbags to further increase the effectiveness of
the seat belt. In a front-end collision, the tensioners instantly retract the belt and buckle firmly to secure the occupants
in their seats.
The side airbag system also includes an occupant position detection system (OPDS). This system consists of sensors
(G) and a OPDS unit (H) in the front passenger’s seat-back. The OPDS unit sends occupant height and position data to
the SRS unit. If the SRS unit determines that the front passenger is of small stature (for example, a child) and the front
passenger is leaning into the side airbag deployment path, the SRS unit will automatically disable the passenger’s
airbag. The SRS unit will also disable the airbag when the OPDS detects certain objects on the seat. When the side
airbag is disabled, the side airbag cutoff indicator on the instrument panel alerts the driver that the passenger’s side
airbag will not deploy in a side impact. When the object is removed, or the passenger sits upright, the side airbag
cutoff indicator will go off after a few seconds, alerting the driver that the side airbag will deploy in a side impact.
05/06/27 18:08:41 61S6M040_230_0028
*01
SRS Operation
For the SRS to operate
Driver’s and Front Passenger’s Airbag(s)
Side Airbag(s)
Self-diagnosis System
23-29
MICROPROCESSOR and DIAGNOSTIC CIRCUIT
SRS UNIT
IMPACT
GND
TRIGGER CIRCUIT
IDC
SCS
MES
DLC
VA
VB
FRONT
PASSENGER’S
SEAT
SIDE
AIRBAG
CUTOFF
INDICATOR
DRIVER’S
SIDE IMPACT
SENSOR
OPDS
SENSOR
OPDS
UNIT
FRONT
PASSENGER’S
SIDE IMPACT
SENSOR
FRONT
PASSENGER’S
SIDE AIRBAG
INFLATOR
DRIVER’S
SIDE AIRBAG
INFLATOR
DRIVER’S
AIRBAG
FIRST
INFLATOR
DRIVER’S
AIRBAG
SECOND
INFLATOR
FRONT
PASSENGER’S
AIRBAG
SECOND
INFLATOR
FRONT
PASSENGER’S
AIRBAG
FIRST
INFLATOR
CABLE
REEL
FRONT
PASSENGER’S
SEAT BELT
TENSIONER
DRIVER’S
SEAT BELT
TENSIONER
FRONT
PASSENGER’S
SEAT BELT
BUCKLE
TENSIONER
DRIVER’S
SEAT BELT
BUCKLE
TENSIONER
RIGHT
FRONT
IMPACT
SENSOR
LEFT
FRONT
IMPACT
SENSOR
SRS
INDICATOR
DATA
LINK
CIRCUIT
MEMORY
CIRCUIT
SIDE
IMPACT
SENSOR
FRONTAL
IMPACT
SENSOR
UNDER-DASH
FUSE/RELAY
BOX
POWER SUPPLY
CIRCUIT
The main circuit in the SRS unit senses and judges the force of impact and, if necessary, ignites the inflator charges. If
battery voltage is too low or power is disconnected due to the impact, the voltage regulator and the back-up power
circuit, respectively, will keep voltage at a constant level.
(1) A front impact sensor must activate, and send electric signals to the microprocessor.
(2) The microprocessor must compute the signals, and depending on the severity of the collision and whether the seat
belt is buckled or unbuckled, it sends the appropriate signals to the airbag inflator(s).
(3) The inflators that received signals must ignite and deploy the airbags.
(1) A side impact sensor must activate, and send electric signals to the microprocessor.
(2) The microprocessor must compute the signals and send them to the side airbag inflator(s). However, the
microprocessor cuts off the signals to the front passenger’s side airbag if the SRS unit determines that the front
passenger’s head is in the deployment path of the side airbag.
(3) The inflator that received the signal must ignite and deploy the side airbag.
A self-diagnosis circuit is built into the SRS unit; if the SRS is operating normally, when the ignition switch is turned
ON (II), the SRS indicator comes on and goes off after about 6 seconds. If the indicator does not come on, or does not
go off after 6 seconds, or if it comes on while driving, it indicates an abnormality in the SRS. The SRS must be
inspected and repaired as soon as possible. For better serviceability, the SRS unit memory stores a DTC that relates to
the cause of the malfunction, and the unit is connected to the data link connector (DLC). This information can be read
with the HDS when it is connected to the DLC (16P) (see page 23-20).
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*90
S6M6A00H46400000000EAAT00
−
23-30
SRS
Circuit Diagram
D
BLK
With BOSE sound system
GRN/ORN
PNK/BLU
BLK
ORN
YEL
10
3
9
G501
C801
5
2
6
1
C
A
3
2
2
1
RED/BLK*
RED/YEL*
RED/WHT*
RED/BLU*
1
2
1
2
3
4
RED/BLK*
RED/YEL*
RED/BLU*
RED/WHT*
8
18
9
17
PNK
CPU
I/F
BLU/BLK*
BLU/RED*
YEL*
BLU/YEL*
1
2
3
GRN/YEL*
GRN/WHT*
GRN/BLK*
GRN/RED*
PNK*
BLK/YEL*
: GRN
: BLK
: WHT/RED
: BLU
G501
4
16
7
YEL
GRN
2
1
12
7
No. 17
(15 A)
No. 13
(10 A)
No. 9
(10 A)
No. 10
(7.5 A)
IG1
BAT
VB
VA
13
4
14
5
6
15
3
4
1
2
BATTERY
1
GAUGE ASSEMBLY
INDICATOR
SRS
7
4
3
8
OPDS UNIT
SRS UNIT
ORN
7
2
3
3
YEL
4
1
3
2
GRN/ORN
GRN
BLK
PNK/BLU
5
PNK/BLU
G401
BLK
PNK
UNDER-HOOD
FUSE/RELAY
BOX
IGNITION
SWITCH
IG1 HOT in ON (II)
and START (III)
UNDER-DASH
FUSE/RELAY BOX
DRIVER’S
AIRBAG
FIRST
INFLATOR
DRIVER’S
AIRBAG
SECOND
INFLATOR
CABLE
REEL
DASHBOARD
WIRE
HARNESS
FRONT
PASSENGER’S
AIRBAG
FIRST
INFLATOR
FRONT
PASSENGER’S
AIRBAG
SECOND
INFLATOR
DRIVER’S
SEAT BELT
TENSIONER
FRONT
PASSENGER’S
SEAT BELT
TENSIONER
FLOOR
WIRE
HARNESS
FLOOR
WIRE
HARNESS
DASHBOARD
WIRE HARNESS
DRI
VER
SEAT BELT
REMINDER
LIGHT
SIDE AIRBAG
CUTOFF
INDICATOR
SRS
INDICATOR
CIRCUIT
DASHBOARD
WIRE HARNESS
DASHBOARD
WIRE HARNESS
SEAT
SUBHARNESS
OPDS
UNIT
HARNESS
OPDS
SENSOR
FRONT
PASSENGER’S
SEAT BELT
BUCKLE
SWITCH
ON:
UNBUCKLED
ON:
BUCKLED
B
B
B
A
C503
: ORN
: WHT/BLU
: WHT
: ORN/BLU
5
: BRN
RED/BLU
BLU/RED
BLK
C504
A
: 4
1
3
: 1
: 3
1
3
: 2
: 2
1
3
: 3
: 4
3
1
: 1
: 6
4
2
: 7
: 18
2
4
: 16
: 7
4
2
: 8
: 11
4
2
: 2
: 13
4
2
: 15
: 3
4
2
: 1
2
2
2
2
4
4
4
4
4
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*90
23-31
C405
C403
*1: ’02 Model
*2 : ’03-06 Models
: ’02-04 Models
2
1
: ’02 Model
*2
*1
2
1
B
1
2
2
1
GRN*
GRN/RED*
GRN/YEL*
GRN/BLK*
1
10
2
11
8
3
16
9
15
8
18
7
17
6
LT GRN/BLK
DATA LINK CONNECTOR (16P)
1
LT GRN
2
1
G404
1
2
1
12
GRN*
BLK*
BLK*
GRN*
RED*
BLK*
BLK*
RED*
11
10
WHT/BLK*
WHT/BLU*
1
2
2
1
SRS UNIT
1
2
WHT/RED*
WHT/GRN*
BRN/YEL*
RED/YEL*
5
6
6
BRN
GRY
2
GRY/RED*
BLU/BLK*
2
1
GRN/ORN*
2
3
BLU/RED
1
BLU/RED
4
G501
LEFT
FRONT
IMPACT
SENSOR
RIGHT
FRONT
IMPACT
SENSOR
ENGINE
COMPARTMENT
WIRE
HARNESS
SRS FRONT
SENSOR
WIRE
HARNESS
DRIVER’S
SEAT BELT
BUCKLE
TENSIONER
FRONT
PASSENGER’S
SEAT BELT
BUCKLE
TENSIONER
DRIVER’S
SIDE AIRBAG
INFLATOR
FRONT
PASSENGER’S
SIDE AIRBAG
INFLATOR
FLOOR
WIRE
HARNESS
DRIVER’S
SIDE IMPACT
SENSOR
FRONT
PASSENGER’S
SIDE IMPACT
SENSOR
FLOOR
WIRE
HARNESS
MEMORY
ERASE
SIGNAL (MES)
CONNECTOR
(2P)
MULTIPLEX
CONTROL
UNIT
UNDER-DASH
FUSE/RELAY
BOX
DRIVER’S
SEAT BELT
BUCKLE
SWITCH
ON :
BUCKLED
ON :
UNBUCKLED
BLK
BLK
BLK
RED/BLU
BLU/RED
: ’03-06 Models
3
: ’05-06 Models
4
: Shielding
BLUE, GREEN, GRAY, ORANGE, or BROWN
wire color can be used for the SRS
circuit’s which has * mark
: 4
3
1
: 1
: 2
1
3
: 3
: 2
1
3
: 1
: 2
3
1
: 1
: 1
1
3
: 2
: 1
3
1
: 2
A
05/06/27 18:08:43 61S6M040_230_0031
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