Subaru Legacy IV (2008 year). Manual - part 1004

AB(diag)-4

General Description

AIRBAG SYSTEM (DIAGNOSTICS)

3. General Description

A: CAUTION

• When servicing a vehicle, be sure to turn the ig-
nition switch to OFF, disconnect the ground cable
from battery, and wait for 20 seconds or more be-
fore starting work.
• The airbag system is fitted with a backup power
source. After disconnecting the battery ground ca-
ble, the airbag may deploy if you do not wait for 20
seconds or more before starting airbag system ser-
vicing.

• If sensors, airbag module, airbag control module,
pretensioner or harness is deformed or damaged,
replace with new parts.

• Do not use the airbag system and pretensioners
on other vehicles. When replacing parts, be sure to
replace them with new parts.
• When checking the airbag system, be sure to
use a digital circuit tester. Use of an analog circuit
tester may cause the airbag to activate erroneously
due to a minimal current inside tester.

• When checking, use a test harness (1). Damage
to connector terminal causes malfunction. Do not
directly put the tester probe on airbag connector
terminal.

• Do not drop the airbag system parts, or keep
them at high temperature of 85°C (153°F) or more,
or let water, oil or grease get on them; the internal
parts may be damaged and reliability greatly low-
ered.

IN-00203

NG

N

N

NG

NG

N

N

NG

G

G

G

G

N

N

N

N

N

NG

G

G

G

G

N

N

N

N

N

N

N

N

N

N

N

NG

AB-01534

NG

NG

NG

NG

NG

NG

N

NG

N

OK

OK

OK

OK

K

O

OK

O

AB-01535

AB-01536

(1)

NG

NG

G

G

G

G

G

N

N

NG

G

G

G

G

G

G

G

G

NG

G

N

N

N

NG

NG

OK

OK

OK

OK

K

K

O

O

O

O

O

O

O

O

O

OK

K

O

O

O

O

O

O

O

O

O

O

O

O

O

O

OK

K

K

K

K

K

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

OK

OK

OK

K

K

OK

K

K

K

K

O

AB-01538

NG

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

NG

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

N

N

N

N

NG

NG

N

N

N

AB(diag)-5

General Description

AIRBAG SYSTEM (DIAGNOSTICS)

• If damage, open circuit or rust is found on airbag
system wiring harness, do not use a soldering
equipment to repair. Replace the faulty harness
with a new genuine part.

• Install the wiring harness securely with the spec-
ified clips to avoid interference or tangled with other
parts.

• Do not allow water or oil to come in contact with
the connector terminals. Also, do not touch the con-
nector terminals.

• Do not disassemble driver’s airbag module, pas-
senger’s airbag module, side or curtain airbag
modules, or pretensioner.

• The airbag module cannot be used again if de-
ployed once.
• After removal, keep the airbag module with the
pad side facing upward on a dry, clean and flat sur-
face away from heat, light sources, moisture and
dust.

• Do not check continuity of the airbag modules for
driver’s side, passenger’s side and curtain, or the
pretensioner.

• The removed front seat with airbag module must
be kept at least 200 mm (8 in) away from walls and
other objects.

• When painting or performing sheet metal work
on the front part of the vehicle, including the front
wheel apron, front fender and front side frame, re-
move the front sub sensors and wiring harness of
airbag system.

NG

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

NG

G

N

NG

G

N

N

N

G

N

N

N

N

N

N

N

N

N

N

N

N

NG

G

G

G

AB-01539

AB-00125

AB-01540

G

G

NG

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

NG

N

N

N

N

N

N

N

N

N

N

N

NG

N

N

N

N

N

N

N

N

N

G

N

N

N

NG

G

G

G

G

AB-01541

NG

NG

NG

G

G

N

N

N

N

N

N

N

NG

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

N

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

N

N

N

N

N

N

N

N

N

N

N

NG

G

G

G

G

G

G

G

NG

G

G

G

NG

NG

NG

(1) 200 mm (8 in) or more

AB-00056

NG

NG

NG

NG

N

N

NG

G

NG

NG

NG

NG

NG

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

N

NG

G

N

N

N

NG

NG

G

G

G

G

G

N

N

NG

G

G

N

NG

G

NG

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

G

AB-01537

AB-00128

(1)

AB(diag)-6

General Description

AIRBAG SYSTEM (DIAGNOSTICS)

• When painting or repairing sheet metal work on
the side of the vehicle, including the side sill, center
pillar, front and rear doors, rear crossmember and
rear floorpan, remove the side airbag sensors, cur-
tain airbag sensor, satellite safing sensor and wir-
ing harness of the airbag system.

• Do not discard uncoupled airbag module. They
could easily cause a serious accident if accidentally
deployed.

AB-01542

NG

N

NG

N

N

N

N

N

N

N

N

NG

G

G

G

G

G

G

G

G

NG

G

NG

G

G

G

G

NG

G

G

N

N

N

N

NG

G

G

G

G

G

G

N

N

N

AB(diag)-7

General Description

AIRBAG SYSTEM (DIAGNOSTICS)

• When storing a removed airbag module, do not place it with the pad side facing downward. Do not place
any objects on the airbag module. Do not pile up the airbag module. If the airbag inflates for some reason
when an airbag module pad is touching other objects, it may cause serious accident.

B: INSPECTION

Measure the battery voltage and check electrolyte.

Standard voltage: 12 V

Specific gravity: 1.260 or more

(1)

Driver’s airbag module

(2)

Passenger’s airbag module

 

 

AB-01543

(1)

(2)

OK

OK

NG

NG

NG

NG