SUBARU LEGACY 1997 Service Repair Manual

1. SELECTION OF CHECK PARTS
1) Conduct on-board diagnostic and call up trouble codes
stored in memory. <Ref. to 5-5 [T4B0].>
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

2. AIRBAG COMPONENT PARTS APPEARANCE
INSPECTION
Conduct appearance inspection on parts selected.
NOTE:
Also check connector terminals, wiring harness, case, etc.
for damage.
3. AIRBAG COMPONENT PARTS VIBRATION
INSPECTION
1) Gently shake check parts (to determine faults.).
2) To check airbag module or roll connector, turn and tilt
steering wheel.
CAUTION:
Do not shake or vibrate airbag control module and
front sensor at the same time as erroneous operation
may result.
G5M0461
4. 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:
Also check wiring harnesses as water may leak along them
and get airbag component parts wet.
42
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). <Ref. to 5-5 [T100].>
NOTE:
Check terminals, case and wiring harnesses for damage.
2) Conduct vibration inspection on airbag connectors (AB2
through AB8). <Ref. to 5-5 [T100].>
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 <Ref. to
5-5 [T5L3].>, airbag main harness <Ref. to 5-5 [W5A0].>,
airbag control module <Ref. to 5-5 [W6A0].> 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

1. Electrical Components Location
1. LHD MODEL
B5M0402A
Connector No. (AB1) (AB2) (AB3) (AB6) (AB7) (AB8) (AB9) (AB10)
Pole 7 3 3 12 3 3 3 3
Color Yellow Yellow Yellow Yellow Yellow Yellow Yellow Yellow
Male/Female Male Female Female Female Male Male Male Female
2
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
1. Electrical Components Location

2. RHD MODEL
B5M0435A
Connector No. (AB1) (AB2) (AB3) (AB6) (AB7) (AB8) (AB9) (AB10)
Pole 7 3 3 12 3 3 3 3
Color Yellow Yellow Yellow Yellow Yellow Yellow Yellow Yellow
Male/Female Male Female Female Female Male Male Male Female
3
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
1. Electrical Components Location

2. Schematic
B5M0464A
4
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
2. Schematic

3. Tools for Diagnostics
CAUTION:
Be sure to use specified test harness A, B or C when
measuring voltage, resistance, etc. of AIRBAG system
component parts.
A: TEST HARNESS A
B5M0112A
5
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
3. Tools for Diagnostics

B: TEST HARNESS B2
G5M0593
6
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
3. Tools for Diagnostics

C: TEST HARNESS C
B5M0113A
7
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
3. Tools for Diagnostics