1997 SUBARU LEGACY fuse

1. SELECTION OF CHECK PARTS
1) Conduct on-board diagnostic and call up trouble codes
stored in memory.
2) Select trouble code required to check airbag compo-
nent parts from those listed in table and reproduce symp-
tom.
Trouble codes Check parts Refer to 5-5:
02Front sensor (RH, LH)
Airbag main harness
Airbag module (Driver/Passenger)
Roll connector
Airbag control moduleW4A0
W5A0
W3A1—W3A2
W7A0
W6A0
03Front sensor (RH, LH)
Airbag control moduleW4A0
W6A0
04Airbag module (Passenger)
Airbag main harness
Airbag control moduleW3A2
W5A0
W6A0
11Fuse No. 8
Airbag main harness
Airbag control module
Body harnessT5D3
W5A0
W6A0
—
12Roll connector
Airbag module (Driver)
Airbag main harness
Airbag control moduleW7A0
W3A1
W5A0
W6A0
13Airbag module (Driver)
Roll connector
Airbag main harness
Airbag control moduleW3A1
W7A0
W5A0
W6A0
21Airbag control module W6A0
22Airbag module (Passenger)
Airbag main harness
Airbag control moduleW3A2
W5A0
W6A0
23Airbag main harness
Roll connector
Airbag module (Driver/Passenger)
Front sensor (RH, LH)
Airbag control moduleW5A0
W7A0
W3A1—W3A2
W4A0
W6A0
24Airbag module (Driver)
Roll connector
Airbag main harness
Airbag control moduleW3A1
W7A0
W5A0
W6A0
32Airbag module (Passenger)
Roll connector
Airbag main harness
Airbag control moduleW3A2
W7A0
W5A0
W6A0
41
5-5SUPPLEMENTAL RESTRAINT SYSTEM
5. Diagnostics Chart with Trouble Code

Q: WARNING LIGHT INDICATES TROUBLE
CODE, THEN NORMAL CODE.
—FLASHING NORMAL CODE.—
DIAGNOSIS:
Airbag connector is faulty.
Fuse No. 16 is blown.
Airbag main harness is faulty.
Airbag control module is faulty.
Body harness is faulty.
1. Airbag connectors appearance and vibration
inspection
O.K.
Not O.K.
Replace faulty parts.
2. Showering inspection to body
O.K.
Not O.K.
Replace faulty parts.
3. Fuse No. 16, airbag main harness, airbag
control module, body harness appearance and
vibration inspection
O.K.
Not O.K.
Replace faulty parts.
4. Showering inspection to body
O.K.
Not O.K.
Replace faulty parts.
5. Warning light illumination check
O.K.
Not O.K.
Go to“T4E0”diagnostics procedure.
Clear memory.
CAUTION:
Before performing diagnostics on airbag system, turn
ignition switch“OFF”, disconnect battery ground
cable, and then wait at least 20 seconds.
1. AIRBAG CONNECTORS APPEARANCE AND
VIBRATION INSPECTION
1) Conduct appearance inspection on airbag connectors
(AB2 through AB8).
NOTE:
Check terminals, case and wiring harnesses for damage.
2) Conduct vibration inspection on airbag connectors (AB2
through AB8).
NOTE:
Gently shake each airbag connector.





43
5-5SUPPLEMENTAL RESTRAINT SYSTEM
5. Diagnostics Chart with Trouble Code

G5M0461
2. SHOWERING INSPECTION TO BODY
1) Spray water on vehicle body.
CAUTION:
Do not directly spray water on airbag components.
2) Check passenger compartment for traces of leaking.
NOTE:
If leaks are noted, also check wiring harnesses as water
may leak along them and wet airbag connectors.
3. FUSE No. 16, AIRBAG MAIN HARNESS, AIRBAG
CONTROL MODULE, BODY HARNESS APPEARANCE
AND VIBRATION INSPECTION
1) Conduct appearance inspection on fuse No. 16 5-5 [T5L3].>, airbag main harness ,
airbag control module and body
harness.
NOTE:
Also check connectors, terminals, wiring harness and case
for damage.
2) Conduct vibration inspection on fuse No. 16, airbag
main harness, airbag control module and body harness.
NOTE:
Gently shake each part.
G5M0461
4. SHOWERING INSPECTION TO BODY
1) Spray water on vehicle body.
CAUTION:
Do not directly spray water on each part.
2) Check passenger compartment for traces of leaking.
NOTE:
If leaks are noted, check wiring harnesses as water may
leak along them and get parts wet.
5. WARNING LIGHT ILLUMINATION CHECK
Turn ignition switch“ON”(engine off) and observe airbag
warning light.
Airbag warning light comes“ON”for 8 seconds then goes
out and stays out.
44
5-5SUPPLEMENTAL RESTRAINT SYSTEM
5. Diagnostics Chart with Trouble Code

D: LIST OF TROUBLE CODES
1. TROUBLE CODES
Trouble code/Contents of troubles Memory function Contents of diagnosis Page
04 Provided.1) Airbag main harness circuit is shorted.
2) Airbag module harness (Ps) circuit is shorted.
3) Airbag control module is faulty.16
11 Provided.1) Airbag control module is faulty.
2) Airbag main harness circuit is open.
3) Fuse No. 8 is blown.
4) Body harness circuit is open.17
12 Provided.1) Airbag main harness circuit is open.
2) Airbag module harness (Dr) circuit is open.
3) Roll connector circuit is open.
4) Airbag control module is faulty.20
13 Provided.1) Airbag main harness circuit is shorted.
2) Airbag module harness (Dr) is shorted.
3) Roll connector circuit is shorted.
4) Airbag control module is faulty.21
14 Not provided.1) (AB9) and (AB10) are not connected properly.
2) (AB2) and (AB7) are not connected properly.
3) (AB3) and (AB8) are not connected properly.
4) (AB6) is not connected properly to airbag control
module.22
21 Provided. Airbag control module is faulty. 24
22 Provided.1) Airbag main harness circuit is open.
2) Airbag module harness (Ps) circuit is open.
3) Airbag control module is faulty.25
31 Not provided.1) Airbag control module is faulty.
2) Airbag main harness circuit is open.
3) Fuse No. 16 is blown.
4) Body harness circuit is open.26
33 Provided. Airbag module is inflated. 28
34 Provided.1) Airbag main harness circuit (Ps) is shorted to
power supply.
2) Airbag module harness (Ps) is shorted to power
supply.
3) Airbag control module is faulty.29
41 Provided.1) Airbag main harness circuit (Dr) is shorted to
ground.
2) Airbag module harness circuit (Dr) is shorted to
ground.
3) Roll connector circuit is shorted to ground.
4) Airbag control module is faulty.30
42 Provided.1) Airbag main harness circuit (Ps) is shorted to
ground.
2) Airbag module harness circuit (Ps) is shorted to
ground.
3) Airbag control module is faulty.31
43 Provided.1) Airbag main harness circuit (Dr) is shorted to
power supply.
2) Airbag module harness (Dr) is shorted to power
supply.
3) Roll connector is shorted to power supply.
4) Airbag control module is faulty.32
11
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System

Trouble code/Contents of troubles Memory function Contents of diagnosis Page
Airbag warning light remains on. Not provided.1) Airbag warning light is faulty.
2) Airbag control module to airbag warning light
harness circuit is shorted or open.
3) Grounding circuit is faulty.
4) Airbag control module is faulty.
5) (AB1) and (B39) are not connected properly.33
Airbag warning light remains off. Not provided.1) Fuse No. 15 is blown.
2) Body harness circuit is open.
3) Airbag warning light is faulty.
4) Airbag main harness is faulty.
5) Airbag control module is faulty.36
Warning light indicates trouble code,
then normal code. (Flashing trouble
code.)Provided. Airbag system component parts are faulty. 38
Warning light indicates trouble code,
then normal code. (Flashing normal
code.)Not provided.1) Airbag connector is faulty.
2) Fuse No. 16 is blown.
3) Airbag main harness is faulty.
4) Airbag control module is faulty.
5) Body harness is faulty.41
[NOTE] Dr: Driver side Ps: Passenger side
2. HOW TO READ TROUBLE CODES
The AIRBAG warning light flashes a code corresponding to
the faulty parts.
The long segment (1.2 sec on) indicates a“ten”, and the
short segment (0.3 sec on) indicates a“one”.
B5M0117A
12
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System

B: TROUBLE CODE 11
DIAGNOSIS:
Airbag control module is faulty.
Airbag main harness circuit is open.
Fuse No. 8 is blown.
Body harness circuit is open.
1. Airbag control module inspection
2. Airbag main harness inspection
3. Fuse No. 8 inspection
CAUTION:
Before performing diagnostics on airbag system, turn
ignition switch“OFF”, disconnect battery ground
cable and then wait at least 20 seconds.
After 20 seconds elapse, remove instrument panel
lower cover, and disconnect (AB3) and (AB8), (AB9)
and (AB10).
G5M0559
1. AIRBAG CONTROL MODULE INSPECTION
1) Disconnect connector (AB6) from airbag control module
and connect it to test harness B2
connector (8B).
2) Connect battery ground cable and turn ignition switch
“ON”. (engine off)
3) Measure voltage across connector (5B) terminal and
chassis ground.
: Connector & terminal
(5B) No. 2 (+)—Chassis ground ():
Is voltage more than 10 V?
: Replace airbag control module.
: Go to step2.


17
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code

2. AIRBAG MAIN HARNESS INSPECTION
1) Go to step 2) below after performing diagnostics on air-
bag system as per diagnosis procedure under“1. AIRBAG
CONTROL MODULE INSPECTION”previously outlined.
2) Turn ignition switch“OFF”, disconnect battery ground
terminal and then wait at least 20 seconds.
B5M0119B
3) Disconnect body harness connector (B31) from connec-
tor (AB1) at front lower pillar, and connect connector (AB1)
to test harness A connector (2A).
4) Measure resistance between test harness A connector
(5A) terminal and test harness B2 connector (5B) terminal.
: Connector & terminal
(5A) No. 1—(5B) No. 2:
Is resistance less than 10Ω?
: Go to step 5).
: Replace airbag main harness.
5) Measure resistance between (5A) and (5B) connector
terminals and chassis ground.
: Connector & terminal
(5A) No. 1 (+)—Chassis ground ():
Is resistance more than 10 kΩ?
: Go to next.
: Replace airbag main harness.
: Connector & terminal
(5B) No. 2 (+)—Chassis ground ():
Is resistance more than 10 kΩ?
: Go to step3.
: Replace airbag main harness.
G5M0444
3. FUSE No. 8 INSPECTION
1) Turn ignition switch“OFF”, and remove airbag fuse pro-
tector.
18
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code

G5M0445
2) Remove and visually check fuse No. 8.
: Is fuse No. 8 blown?
: Replace fuse No. 8 if fuse No. 8 blows again,
repair body harness.
: Repair body harness.
19
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code