Page 2689 of 2890

B5M0123B
3. GROUNDING CIRCUIT INSPECTION
1) Turn ignition switch“OFF”, disconnect battery ground
cable and then wait at least 20 seconds. Disconnect con-
nector (AB1) from body harness connector (B31), and con-
nect connector (B31) to test harness A connector (1A).
Measure resistance between connector (5A) terminal and
chassis ground.
: Connector & terminal
(5A) No. 17 (+)—Chassis ground ( ):
Is resistance less than 10Ω?
: Go to next.
: Repair body grounding circuit.
: Connector & terminal
(5A) No. 18 (+)—Chassis ground ( ):
Is resistance less than 10Ω?
: Go to step 2).
: Repair body grounding circuit.
G5M0559
2) Connect connectors (AB1) and (B31). Disconnect con-
nector (AB6) from airbag control module
[W5A0].>, and connect it to test harness B2 connector
(8B).
3) Measure resistance between each test harness B2 con-
nector (5B) terminal and chassis ground.
: Connector & terminal
(5B) No. 11 (+)—Chassis ground ( ):
Is resistance less than 10Ω?
: Go to next.
: Replace airbag main harness.
: Connector & terminal
(5B) No. 12 (+)—Chassis ground ( ):
Is resistance less than 10Ω?
: Replace airbag control module.
: Replace airbag main harness.
35
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code
Page 2690 of 2890

O: AIRBAG WARNING LIGHT REMAINS OFF.
DIAGNOSIS:
Fuse No. 15 is blown.
Body harness circuit is open.
Airbag warning light is faulty.
Airbag main harness is faulty.
Airbag control module is faulty.
1. Fuse No. 15 inspection
2. Body harness inspection
3. Airbag warning light module (in combination
meter) inspection
4. Airbag main harness inspection
CAUTION:
Before performing diagnostics on airbag system, turn
ignition switch“OFF”, disconnect battery ground
terminal, and then wait at least 20 seconds.
G5M0460
1. FUSE No. 15 INSPECTION
Remove and visually check fuse No. 15.
: Is fuse No. 15 blown?
: Replace fuse No. 15.
If fuse No. 15 blows again, go to step2.
: Go to step2.
2. BODY HARNESS INSPECTION
Turn ignition switch“ON”(engine off) to make sure other
warning lights (in combination meter) illuminate.
: Do all the warning lights (in combination
meter) except airbag warning light come
on?
: Go to step3.
: Repair body harness.
36
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code
Page 2691 of 2890

B5M0122B
3. AIRBAG WARNING LIGHT MODULE (IN
COMBINATION METER) INSPECTION
1) Turn ignition switch“OFF”, disconnect battery ground
cable and then wait at least 20 seconds.
2) Disconnect body harness connector (B31) from connec-
tor (AB1).
B5M0124A
3) Connect battery ground cable and turn ignition switch
“ON”(engine off) to make sure airbag warning light illumi-
nates.
: Does the airbag warning light come on?
: Go to step4.
: Replace airbag warning light module1.
G5M0312
4. AIRBAG MAIN HARNESS INSPECTION
1) Turn ignition switch“OFF”, disconnect battery ground
cable and then wait at least 20 seconds.
2) Connect body harness connector (B31) and connector
(AB1).
3) Disconnect connectors (AB3) and (AB8) below steering
column.
G5M0313
4) Disconnect connector (AB6) from airbag control mod-
ule.
5) Connect battery ground cable and turn ignition switch
“ON”to make sure airbag warning light illuminates.
: Does the airbag warning light come on?
: Replace airbag control module.
: Replace airbag main harness.
37
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code
Page 2692 of 2890
P: WARNING LIGHT INDICATES TROUBLE
CODE, THEN NORMAL CODE.
—FLASHING TROUBLE CODE.—
DIAGNOSIS:
Airbag system component parts are faulty.
1. Airbag component parts appearance
inspection
2. Airbag component parts vibration inspection
3. Showering inspection to body
CAUTION:
Before performing diagnostics on airbag system, turn
ignition switch“OFF”, disconnect battery ground
cable, and then wait at least 20 seconds.
38
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code
Page 2693 of 2890
![SUBARU LEGACY 1996 Service Repair Manual 1. AIRBAG COMPONENT PARTS APPEARANCE
INSPECTION
1) Conduct on-board diagnostic and call up trouble codes
stored in memory. <Ref. to 5-5b [T4B0].>
2) Select trouble code required to check airbag compo- SUBARU LEGACY 1996 Service Repair Manual 1. AIRBAG COMPONENT PARTS APPEARANCE
INSPECTION
1) Conduct on-board diagnostic and call up trouble codes
stored in memory. <Ref. to 5-5b [T4B0].>
2) Select trouble code required to check airbag compo-](/manual-img/17/57433/w960_57433-2692.png)
1. AIRBAG COMPONENT PARTS APPEARANCE
INSPECTION
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 5-5b:
04Airbag module (Passenger)
Airbag main harness
Airbag control moduleW3A2
W4A0
W5A0
11Fuse No. 8
Airbag main harness
Airbag control module
Body harnessT5D3
W4A0
W5A0
—
12Roll connector
Airbag module (Driver)
Airbag main harness
Airbag control moduleW6A0
W3A1
W4A0
W5A0
13Airbag module (Driver)
Roll connector
Airbag main harness
Airbag control moduleW3A1
W6A0
W4A0
W5A0
21Airbag control module W5A0
22Airbag module (Passenger)
Airbag main harness
Airbag control moduleW3A2
W4A0
W5A0
33Airbag control module W5A0
34Airbag main harness
Airbag module (Passenger)
Airbag control moduleW4A0
W3A2
W5A0
41Airbag module (Driver)
Roll connector
Airbag main harness
Airbag control moduleW3A1
W6A0
W4A0
W5A0
42Airbag module (Passenger)
Airbag main harness
Airbag control moduleW3A2
W4A0
W5A0
43Airbag module (Driver)
Roll connector
Airbag main harness
Airbag control moduleW3A1
W6A0
W4A0
W5A0
39
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code
Page 2694 of 2890

3) Conduct appearance inspection on parts selected.
: Is there anything unusual about the appear-
ance of airbag component parts?
: Replace faulty airbag component parts.
: Go to step2.
NOTE:
Also check connector terminals, wiring harness, case, etc.
for damage.
2. 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.
: Does the component malfunction again
when shaking?
: Replace faulty airbag component parts.
: Go to step3.
G5M0461
3. SHOWERING INSPECTION TO BODY
Spray water on vehicle body.
CAUTION:
Do not directly spray water on airbag components.
: Does water leak into the passenger com-
partment when showering vehicle?
: Replace faulty airbag component parts.
: Clear memory.
NOTE:
Also check wiring harnesses as water may leak along them
and get airbag component parts wet.
40
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code
Page 2695 of 2890

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 connector appearance inspection
2. Airbag connector vibration inspection
3. Showering inspection to body
4. Fuse No. 16, airbag main harness, airbag
control module, body harness appearance
inspection
5. Fuse No. 16, airbag main harness, body
harness vibration inspection
6. Showering inspection to body
7. Warning light illumination check
CAUTION:
Before performing diagnostics on airbag system, turn
ignition switch“OFF”, disconnect battery ground
cable, and then wait at least 20 seconds.
1. AIRBAG CONNECTOR APPEARANCE INSPECTION
Conduct appearance inspection on airbag connectors
(AB2) through (AB8).
: Is there anything unusual about the appear-
ance of connectors (AB2) through (AB8)?
: Replace faulty airbag component parts.
: Go to step2.
NOTE:
Check terminals, case and wiring harnesses for damage.
41
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code
Page 2696 of 2890
![SUBARU LEGACY 1996 Service Repair Manual 2. AIRBAG CONNECTOR VIBRATION INSPECTION
Conduct vibration inspection on airbag connectors (AB2)
through (AB8). <Ref. to 5-5b [T100].>
: Do the connectors (AB2) through (AB8) mal-
function again when SUBARU LEGACY 1996 Service Repair Manual 2. AIRBAG CONNECTOR VIBRATION INSPECTION
Conduct vibration inspection on airbag connectors (AB2)
through (AB8). <Ref. to 5-5b [T100].>
: Do the connectors (AB2) through (AB8) mal-
function again when](/manual-img/17/57433/w960_57433-2695.png)
2. AIRBAG CONNECTOR VIBRATION INSPECTION
Conduct vibration inspection on airbag connectors (AB2)
through (AB8).
: Do the connectors (AB2) through (AB8) mal-
function again when shaking?
: Replace faulty airbag component parts.
: Go to step3.
NOTE:
Gently shake each airbag connector.
G5M0461
3. SHOWERING INSPECTION TO BODY
Spray water on vehicle body.
CAUTION:
Do not directly spray water on airbag components.
: Does water leak into the passenger com-
partment when showering vehicle?
: Replace faulty airbag component parts.
: Go to step4.
NOTE:
If leaks are noted, also check wiring harnesses as water
may leak along them and wet airbag connectors.
4. FUSE No. 16, AIRBAG MAIN HARNESS, AIRBAG
CONTROL MODULE, BODY HARNESS APPEARANCE
INSPECTION
Conduct appearance inspection on fuse No. 16
5-5b [T5H3].>, airbag main harness
[W4A0].>, airbag control module
and body harness.
: Is there anything unusual about the appear-
ance of fuse No. 16, airbag main harness,
airbag control module or body harness?
: Replace faulty airbag component parts.
: Go to step5.
NOTE:
Also check connectors, terminals, wiring harness and case
for damage.
42
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
5. Diagnostics Chart with Trouble Code