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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
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4. Diagnostics Chart for On-board Diagnostic System
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![SUBARU LEGACY 1997 Service Repair Manual E: DIAGNOSTICS PROCEDURE
1. AIRBAG WARNING LIGHT STAYS ON AFTER
ABOUT 7 SECONDS.
1) Perform on-board diagnostic. <Ref. to 5-5b [T4B0].>
2) Are trouble codes 4, 12, 13, 22, 34, 41, 42 or 43 indi-
cated](/manual-img/17/57434/w960_57434-3115.png "SUBARU LEGACY 1997 Service Repair Manual E: DIAGNOSTICS PROCEDURE
1. AIRBAG WARNING LIGHT STAYS ON AFTER
ABOUT 7 SECONDS.
1) Perform on-board diagnostic. <Ref. to 5-5b [T4B0].>
2) Are trouble codes 4, 12, 13, 22, 34, 41, 42 or 43 indi-
cated")
E: DIAGNOSTICS PROCEDURE
1. AIRBAG WARNING LIGHT STAYS ON AFTER
ABOUT 7 SECONDS.
1) Perform on-board diagnostic.
2) Are trouble codes 4, 12, 13, 22, 34, 41, 42 or 43 indi-
cated?
Record trouble codes. If“YES”proceed to step 4). If“NO”
proceed to step 3).
3) Proceed with diagnostics and repair according to
trouble code indicated then perform step 15).
4) If codes 4, 22, 34, 42 are indicated, proceed to step 5).
If codes 4, 22, 34, 42 are not indicated, proceed to step
10).
5) If codes 12, 13, 41, 43 are indicated, proceed to step 6).
If codes 12, 13, 41, 43 are not indicated, proceed to step
11).
G5M0589
G5M0429
6) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Disconnect passenger side
airbag module connector (AB9) to (AB10).
[W3A2].> Connect test harness C connector (1C) to (AB9).
Connect airbag resistor to test harness C connector (3C).
Remove lower cover panel and connect test harness C
connector (1C) to (AB8) with airbag
resistor attached to test harness C connector (3C).
Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after about 7
seconds and remain off for more than 30 seconds?
See“NOTE:”.
If“YES”proceed to step 7).
If“NO”proceed to step 3).
G5M0429
7) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Connect passenger side air-
bag module connector (AB9) to (AB10). Connect battery
ground cable and turn ignition switch“ON”. Does airbag
warning light go“OFF”after about 7 seconds and remain
off for more than 30 seconds?
See“NOTE:”.
If“YES”proceed to step 8).
If“NO”proceed to step 13).
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4. Diagnostics Chart for On-board Diagnostic System
Page 3117 of 3342
G5M0430
8) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Connect connector (AB8) to
(AB3). Remove driver side airbag module and connect test
harness C connector (1C) to (AB7).
Connect airbag resistor to test harness C connector (3C).
Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after about 7
seconds and remain off for more than 30 seconds?
See“NOTE:”.
If“YES”proceed to step 9).
If“NO”proceed to step 14).
9) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Replace with a new driver side
airbag module. Proceed to step
15).
G5M0429
10) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Remove lower cover panel
and connect test harness C connector (1C) to (AB8)
to 5-4 [W1A0].> with airbag resistor attached to test har-
ness C connector (3C).
Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after about 7
seconds and remain off for more than 30 seconds?
See“NOTE:”.
If“YES”proceed to step 8).
If“NO”proceed to step 3).
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4. Diagnostics Chart for On-board Diagnostic System
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![SUBARU LEGACY 1997 Service Repair Manual G5M0589
11) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Disconnect passenger side
airbag module connector (AB9) to (AB10). <Ref. to 5-5b
[W3A2].>
Connect test](/manual-img/17/57434/w960_57434-3117.png "SUBARU LEGACY 1997 Service Repair Manual G5M0589
11) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Disconnect passenger side
airbag module connector (AB9) to (AB10). <Ref. to 5-5b
[W3A2].>
Connect test")
G5M0589
11) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Disconnect passenger side
airbag module connector (AB9) to (AB10).
[W3A2].>
Connect test harness C connector (1C) to (AB9). Connect
airbag resistor to test harness C connector (3C).
Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after about 7
seconds and remain off for more than 30 seconds?
See“NOTE:”.
If“YES”proceed to step 12).
If“NO”proceed to step 3).
12) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Replace with a new passen-
ger side airbag module then pro-
ceed to step 15).
13) Turn ignition switch“OFF”, disconnect battery ground
cable and wait 20 seconds. Replace with a new passenger
side airbag module then proceed
to step 7).
14) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Replace with a new combina-
tion switch, and install driver side
airbag module .
Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after about 7
seconds and remain off for more than 30 seconds?
See“NOTE:”.
If“YES”proceed to step 16).
If“NO”proceed to step 9).
15) Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after about 7
seconds and remain off for more than 30 seconds? See
“NOTE:”.
If“YES”proceed to step 16).
If“NO”proceed to step 1).
16) Perform clear memory procedure.
[T4C0].>
If memory cannot be cleared, another trouble code exists.
Return to step 1).
If memory can be cleared, proceed to step 17).
17) END
NOTE:
Always remember to secure the green double locks
before turning the ignition switch“ON”.
In some cases the airbag warning light will go“OFF”
after about 7 seconds but will turn“ON”again within 30
seconds. In this case continue diagnostics with the basic
diagnostics procedures or trouble code procedures.
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F: TROUBLE CODE 21
DIAGNOSIS:
Airbag control module is faulty.
1. Check if trouble code 21 is indicated.
CAUTION:
Before performing diagnostics on airbag system, turn
ignition switch“OFF”, disconnect battery ground
terminal, and then wait at least 20 seconds.
5-5b [W5A0].>
1. CHECK IF TROUBLE CODE 21 IS INDICATED.
Confirm flashing trouble code according to 5-5b [T4A0]
“BASIC DIAGNOSTICS PROCEDURE”.
: Is airbag warning light trouble code 21 indi-
cated?
: Replace airbag control module.
: Clear memory.
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5. Diagnostics Chart with Trouble Code
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I: TROUBLE CODE 33
DIAGNOSIS:
Airbag module is inflated.
1. Check if trouble code 33 is indicated.
CAUTION:
Before performing diagnostics on airbag system, turn
ignition switch“OFF”, disconnect battery ground
terminal, and then wait at least 20 seconds.
[W6A0].>
1. CHECK IF TROUBLE CODE 33 IS INDICATED.
Confirm flashing trouble code according to 5-5b [T4A0]
“BASIC DIAGNOSTICS PROCEDURE”.
: Is airbag warning light trouble code 33 indi-
cated?
: Replace airbag control module.
: Clear memory.
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5. Diagnostics Chart with Trouble Code
Page 3136 of 3342
N: AIRBAG WARNING LIGHT REMAINS ON.
DIAGNOSIS:
Airbag warning light is faulty.
Airbag control module to airbag warning light harness
circuit is shorted or open.
Grounding circuit is faulty.
Airbag control module is faulty.
(AB1) and (B31) are not connected properly.
1. Double lock inspection for connectors (AB1)
and (B31)
2. Inspection of body harness, connector and
airbag warning light
3. Grounding circuit inspection
CAUTION:
Before performing diagnostics on airbag system, turn
ignition switch“OFF”, disconnect battery ground
cable and then wait at least 20 seconds.
B5M0122B
1. DOUBLE LOCK INSPECTION FOR CONNECTORS
(AB1) AND (B31)
1) Remove front pillar lower trim (Driver side).
2) Check double lock of connectors (AB1) and (B31).
: Is there poor contact in double lock of con-
nectors (AB1) and (B31)?
: Repair poor contact in double lock of connectors
(AB1) and (B31).
: Go to step2.
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5. Diagnostics Chart with Trouble Code
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B5M0123B
2. INSPECTION OF BODY HARNESS, CONNECTOR
AND AIRBAG WARNING LIGHT
1) Turn ignition switch“OFF”and connect body harness
connector (B31) to test connector A connector (1A).
G5M0455
2) Connect battery ground cable and turn ignition switch
“ON”, (engine off) and connect connectors (3A) and (4A).
: Does the airbag warning light come off?
: Go to step 3).
: Go to next.
B5M0124A
: Is there anything unusual to body harness?
: Repair body harness.
: Replace airbag warning light module1.
NOTE:
After problem has been eliminated, disconnect connectors
(3A) and (4A).
G5M0559
3) Turn ignition switch“OFF”, disconnect battery ground
cable and then wait at least 20 seconds, and re-connect
connectors (AB1) and (B31).
4) Remove instrument panel lower cover and disconnect
(AB3) with (AB8), then disconnect connector (AB6) from
airbag control module, and connect
it to test harness B2 connector (8B).
G5M0458
5) Connect battery ground cable and turn ignition switch
“ON,”(engine off) and connect connectors (6B) and (7B).
: Does the airbag warning light come on?
: Go to step3.
: Replace airbag main harness.
NOTE:
After problem has been eliminated, disconnect connectors
(6B) and (7B).
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5. Diagnostics Chart with Trouble Code
