2004 SUBARU IMPREZA WRX wiring

1-29
Seat, seatbelt and SRS airbags
– CONTINUED –
your SUBARU dealer.
! System monitors
A diagnostic system continually monitors the readi-
ness of the seatbelt pretensioner while the vehicle is
being driven. The seatbelt pretensioners share the
control module with the SRS airbag system. There-
fore, if any malfunction occurs in a seatbelt preten-
sioner, the SRS airbag system warning light will illumi-
nate. The SRS airbag system warning light will show
normal system operation by lighting for about 6 sec-
onds when the ignition key is turned to the “ON” posi- tion.
The following components are monitored by the indi- cator:"
Front sub sensor (Right hand side)
" Front sub sensor (Left hand side)
" Airbag control module (including impact sensors)
" Seatbelt pretensioner (driver’s side)
" Seatbelt pretensioner (Passenger’s side)
" All related wiring
" And all other airbag components
In the event of a malfunction indicated by any of follow-
ing, the vehicle should be taken promptly to your near-
est SUBARU dealer to have the system checked. Un-
less checked and repaired, the seatbelt pretensioners
and SRS airbag will not function reliably: " Flashing or flickering of the indicator light.
" No illumination of the warning light when the ignition
switch is first turned to the “ON” position." Continuous illumination of the warning light.
" Illumination of the warning light while driving.
! System servicing
"When discarding a seatbelt retractor assem-
UG7020DA

1-30
Seat, seatbelt and SRS airbags
bly or scrapping the entire car damaged by a
collision, consult your SUBARU dealer. "
Tampering with or disconnecting the sys-
tem’s wiring could result in accidental activa-
tion of the seatbelt pretensioner and/or SRS air-
bag or could make the system inoperative,
which may result in serious injury. The wiring
harnesses of the seatbelt pretensioner and SRS
airbag systems are covered with yellow insula-
tion and the connectors of the system are yel-
low for easy identification. Do not use electrical
test equipment on any circuit related to the
seatbelt pretensioner and SRS airbag systems.
For required servicing of the seatbelt preten-
sioner, see your nearest SUBARU dealer.
The front sub sensors are located in both front
fenders and the SRS airbag control module in-
cluding the impact sensors is located under the
center console. If you need service or repair in
those areas or near the front seatbelt retrac-
tors, we recommend that you have an autho-
rized SUBARU dealer perform the work.
NOTE
If the front part of the vehicle is damaged in an ac-
cident to the extent that the seatbelt pretensioner
does not operate, contact your SUBARU dealer as
soon as possible. ! Precautions against vehicle modifica- tion
Always consult your SUBARU dealer if you want to in-
stall any accessory parts to your vehicle.
Do not perform any of the following modifica-
tions. Such modifications can interfere with
proper operation of the seatbelt pretensioners. " Attachment of any equipment (bush bar,
winches, snow plow, skid plate, etc.) other than
SUBARU genuine accessory parts to the front
end." Modification of the suspension system or
front end structure." Installation of a tire of different size and con-
struction from the tires specified on the tire
placard attached to the driver’s door jamb.

1-55
Seat, seatbelt and SRS airbags
– CONTINUED –
21
4
35
12
9
7
10
11
8
6
UG1034BB
1) Airbag control module (including
impact sensors)
2) Airbag module (driver’s side)
3) Airbag module (passenger’s side)
4) Front sub sensor (left hand side)
5) Front sub sensor (right hand side)
6) Side airbag module (driver’s
side — if equipped)
7) Side airbag module (passen-
ger’s side — if equipped)
8) Side airbag sensor (driver’s side — if equipped)
9) Side airbag sensor (passenger’s side — if equipped)
10) Airbag wiring (yellow)
11) Seatbelt pretensioner (driver’s side)
12) Seatbelt pretensioner (passen-
ger’s side)

1-73
Seat, seatbelt and SRS airbags
– CONTINUED –
"Airbag control module (including impact sensors)
" Frontal airbag module (Driver’s side)
" Frontal airbag module (Passenger’s side)
" Side airbag sensor (Driver’s side — if equipped)
" Side airbag sensor (Passenger’s side — if
equipped) " Side airbag module (Driver’s side — if equipped)
" Side airbag module (Passenger’s side — if
equipped)" Seatbelt pretensioner (Driver’s side)
" Seatbelt pretensioner (Passenger’s side)
" All related wiring
In the event of a malfunction indicated by any of follow-
ing, the vehicle should be taken promptly to your near-
est SUBARU dealer to have the system checked. Un-
less checked and repaired, the SRS airbags will not
function reliably: " Flashing or flickering of the indicator light.
" No illumination of the warning light when the ignition
switch is first turned to the “ON” position." Continuous illumination of the warning light.
" Illumination of the warning light while driving. !
SRS airbag system servicing
"When discarding an airbag module or scrap-
ping the entire car damaged by a collision, con-
sult your SUBARU dealer." The SRS airbag has no user-serviceable
parts. Do not use electrical test equipment on
any circuit related to the SRS airbag system.
For required servicing of the SRS airbag, see
your nearest SUBARU dealer. Tampering with
or disconnecting the system’s wiring could re-
sult in accidental inflation of the SRS airbag or
could make the system inoperative, which may
result in serious injury. The wiring harnesses of
the SRS airbag system are covered with yellow
insulation and system connectors are yellow
for easy identification.
If you need service or repair in areas listed be-
low, we recommend that you have an autho-
rized SUBARU dealer perform the work. The
SRS airbag control module, impact sensors
and airbag modules are stored in these areas.

1-74
Seat, seatbelt and SRS airbags
"
Under the center console
" Inside each front fender
" Steering wheel and column and nearby areas
" Top of the dashboard on front passenger’s
side and nearby areas " Each front seat and nearby area (only for ve-
hicles with SRS side airbags)
" Inside each center pillar
In the event that the SRS airbag is deployed, re-
placement of the system should be performed
only by an authorized SUBARU dealer. When the
components of the SRS airbag system are re-
placed, use only genuine SUBARU parts.
To ensure their long-term reliability, the SRS airbags
must be inspected by a SUBARU dealer ten years af-
ter the date of manufacture, which is shown on the cer-
tification plate attached to the driver’s door jamb.
NOTE
In the following cases, contact your SUBARU deal-
er as soon as possible. " The front part of the vehicle was involved in an
accident in which the SRS frontal airbags did not
deploy. " The pad section of the steering wheel or front passenger’s frontal airbag cover is scratched,
cracked, or otherwise damaged.
In addition, if your vehicle is equipped with SRS
side airbags, contact your SUBARU dealer as
soon as possible in the following cases. "
Either center pillar or a nearby area of the vehi-
cle was involved in an accident in which the SRS
side airbag did not deploy. " The fabric or leather of either front seatback is
cut, frayed, or otherwise damaged. ! Precautions against vehicle modifica- tion
"To avoid accidental activation of the system
or rendering the system inoperative, which may
result in serious injury, no modifications
should be made to any components or wiring of
the SRS airbag system.
This includes following modifications: "Installation of custom steering wheels
" Attachment of additional trim materials to
the dashboard " Installation of custom seats (for vehicles

1-75
Seat, seatbelt and SRS airbags
– CONTINUED –
with SRS side airbags only) "Replacement of seat fabric or leather (for
vehicles with SRS side airbags only) " Installation of additional fabric or leather
on the front seat (for vehicles with SRS side
airbags only)
" Installation of additional electrical/electronic
equipment such as a mobile two-way radio on
or near the SRS airbag system components
and/or wiring is not advisable. This could inter-
fere with proper operation of the SRS airbag
system.
Do not perform any of the following modifica-
tions. Such modifications can interfere with
proper operation of the SRS airbag system." Attachment of any equipment (brush bar,
winches, snow plow, skid plate, etc.) other than
SUBARU genuine accessory parts to the front
end. " Modification of the suspension system or
front end structure. " Installation of a tire of different size and con-
struction from the tires specified on the tire placard attached to the driver’s door jamb. "
Attachment of any equipment (side steps or
side sill protectors, etc.) other than SUBARU
genuine accessory parts to the side body (for
vehicles with side airbags only).
Always consult your SUBARU dealer if you want to in-
stall any accessory parts to your vehicle.

11 - 4
Maintenance and service
the materials in the vehicle may be hazardous if
improperly used or handled, for example, bat- tery acid."
Your vehicle should only be serviced by per-
sons fully competent to do so. Serious person-
al injury may result to persons not experienced
in servicing vehicles. " Always use the proper tools and make certain
that they are well maintained. " Never get under the vehicle supported only
by a jack. Always use a safety stands to sup-
port the vehicle. " Never keep the engine running in a poorly
ventilated area, such as a garage or other
closed areas. " Do not smoke or allow open flames around
the fuel or battery. This will cause a fire. " Because the fuel system is under pressure,
replacement of the fuel filter should be per-
formed only by your SUBARU dealer. " Wear adequate eye protection to guard
against getting oil or fluids in your eyes. If
something does get in your eyes, thoroughly
wash them out with clean water. " Do not tamper with the wiring of the SRS air-
bag system or seatbelt pretensioner system, or
attempt to take its connectors apart, as that may activate the system or it can render it inop-
erative. The wiring and connectors of these
systems are yellow for easy identification. NEV-
ER use a circuit tester for these wiring.
If your SRS airbag or seatbelt pretensioner
needs service, consult your nearest SUBARU
dealer.
! Before checking or servicing in the en-
gine compartment
"Always stop the engine and set the parking
brake firmly to prevent the vehicle from mov-
ing. " Always let the engine cool down. Engine
parts become very hot when the engine is run-
ning and remain hot for some time after the en-
gine is stopped. " Do not spill engine oil, engine coolant, brake
fluid or any other fluid on hot engine compo-
nents. This may cause a fire. " Always remove the key from the ignition
switch. When the ignition switch is in the “ON”
position, the cooling fan may operate suddenly

11 - 6 0
Maintenance and service
Fuses
Never replace a fuse with one having a higher
rating or with material other than a fuse be-
cause serious damage or a fire could result.
The fuses are designed to melt during an overload to
prevent damage to the wiring harness and electrical
equipment. The fuses are located in two fuse boxes.
One is located under the instrument panel behind the
coin tray on the driver’s seat side. To remove the coin tray, open the cover and pull the
coin tray out.
UGB547BA
UGB550BA