Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1998 1998 Service Manual DIAGNOSTICS SECTION SUPPLEMENTAL RESTRAINT SYSTEM MSA5TCD98L21350

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5-5 [T4A1] SUPPLEMENTAL RESTRAINT SYSTEM
4. Diagnostics Chart for On-board Diagnostic System

4. Diagnostics Chart for On- 4A4 : CHECK AIRBAG WARNING LIGHT
board Diagnostic System ILLUMINATES.

A: BASIC DIAGNOSTICS Check airbag warning light illuminates.
PROCEDURE : Does airbag warning light come ON
for about 7 seconds, then go out and
4A1 : CHECK AIRBAG WARNING LIGHT stay out?
ILLUMINATES.
: Perform clear memory.
1) Airbag warning light comes ON. : Go to step 4A1.
2) Turn ignition switch to ON (engine OFF).
3) Check airbag warning light illuminates. B: ON-BOARD DIAGNOSTICS
: Does airbag warning light stay ON When the airbag system is in functioning condition,
after about 7 seconds or remain OFF, the airbag warning light will remain on for about 7
or come back ON after 30 seconds? seconds and go out when the ignition switch is set
: Repair and replace. If there is any malfunction, the airbag warning light
: Go to step 4A2. will either stay on or off continuously. In such
cases, perform on-board diagnostic in accordance
with the specified procedure to determine trouble
4A2 : CHECK TROUBLE CODE INDICATES. codes.
1) Turn ignition switch ON (with engine OFF).
Perform ON-BOARD DIAGNOSTICS. 2) Connect DIAG. terminal (A) to No. 1 terminal of
diagnosis connector (B) located below lower cover.
: Does trouble code indicate?
: Repair and replace. Go to step 4A3.
: Repair and replace. Go to step 4A3.

4A3 : CHECK AIRBAG WARNING LIGHT
ILLUMINATES. B5M0115F

1) Turn ignition switch to ON (engine OFF). 3) Check in accordance with the trouble code indi-
2) Check airbag warning light illuminates. cated by the AIRBAG warning light, and record the
trouble codes.
: Does airbag warning light stay ON 4) Turn the ignition switch "OFF" and remove the
after about 7 seconds or come back DIAG. terminal from No.1 terminal of diagnosis
ON after 30 seconds? connector.
: Repair and replace.
: Go to step 4A4.

10
SUPPLEMENTAL RESTRAINT SYSTEM [T4D3] 5-5
4. Diagnostics Chart for On-board Diagnostic System

C: CLEAR MEMORY D: DIAGNOSTICS PROCEDURE
After eliminating problem as per trouble code, clear
memory as follows: 4D1 : CHECK TROUBLE CODE INDICATES.
1) Make sure ignition switch is ON (and engine
off). Connect one DIAG. terminal "A" (A) on diag- 1) Perform on-board diagnostic.
While warning light is flashing, connect the other 2) Check trouble code indicates.
DIAG. terminal "B" (B) on terminal No. 2 for at least
three seconds. : Are trouble codes 4, 12, 13, 22, 34, 41,
42, or 43 indicated?
: Go to step 4D2.
: Perform diagnostics and repair accord-
ing to indicated trouble code. Go to step 4D10.

4D2 : CHECK TROUBLE CODE INDICATES.

B5M0116F Check trouble code indicates.
2) After memory is cleared, normal warning light : Are trouble codes 4, 22, 34, 42 indi-
flashing rate resumes. (Warning light flashes every cated?
0.6 seconds ON-OFF operation.) Memory cannot : Go to step 4D3.
be cleared if any problem exists. : Go to step 4D7.
3) After clear memory and then DIAG. terminals
"A" and "B", extract from diagnosis connector.
4D3 : CHECK TROUBLE CODE INDICATES.

Check trouble code indicates.
: Are trouble codes 12, 13, 41, 43 indi-
cated?
: Go to step 4D4.
: Go to step 4D8.

11
5-5 [T4D4] SUPPLEMENTAL RESTRAINT SYSTEM
4. Diagnostics Chart for On-board Diagnostic System

4D4 : CHECK AIRBAG WARNING LIGHT 4D5 : CHECK AIRBAG WARNING LIGHT
ILLUMINATES. ILLUMINATES.

1) Turn ignition switch to OFF. Disconnect battery 1) Turn ignition switch to OFF. Disconnect battery
ground cable, and wait 20 seconds. ground cable, and wait 20 seconds.
2) Disconnect passenger's airbag module con- 2) Connect passenger's airbag module connector
nector (AB9) to (AB10). (AB9) to (AB10).
3) Connect test harness F connector (1F) to 3) Connect battery ground cable and turn ignition
(AB9). switch to ON.
4) Connect airbag resistor to test harness F con- 4) Check airbag warning light illuminates.
nector (3F). NOTE:
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.
: Does airbag warning light go off after
about 7 seconds and remain off for
more than 30 seconds?
: Go to step 4D6.
S5M0249A : Replace with a new passenger's airbag
5) Remove lower cover panel Go to
[W1A0].> and connect test harness F connector step 4D5.
(1F) to (AB8) with airbag resistor attached to test
harness F connector (3F).

S5M0250A

6) Connect battery ground cable and turn ignition
switch to ON.
7) Check airbag warning light illuminates.
NOTE:
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.
: Does airbag warning light go off after
about 7 seconds and remain off for
more than 30 seconds?
: Go to step 4D5.
: Perform diagnostics and repair accord-
ing to indicated trouble code. Go to step 4D10.

12
SUPPLEMENTAL RESTRAINT SYSTEM [T4D7] 5-5
4. Diagnostics Chart for On-board Diagnostic System

4D6 : CHECK AIRBAG WARNING LIGHT 4D7 : CHECK AIRBAG WARNING LIGHT
ILLUMINATES. ILLUMINATES.

1) Turn ignition switch to "OFF". Disconnect bat- 1) Turn ignition switch to OFF. Disconnect battery
tery ground cable, and wait 20 seconds. ground cable, and wait 20 seconds.
2) Connect connector (AB8) to (AB3). 2) Remove lower cover panel and connect test
3) Remove driver's airbag module and connect harness F connector (1F) to (AB8) with airbag resistor attached to test har-
5-5 [W3A1].> ness F connector (3F).
4) Connect airbag resistor to test harness F con-
nector (3F).

S5M0250A

S5M0251A
3) Connect battery ground cable and turn ignition
switch to ON.
5) Connect battery ground cable and turn ignition 4) Check airbag warning light illuminates.
switch to ON. NOTE:
6) Check airbag warning light illuminates. In some cases the airbag warning light will go OFF
NOTE: after about 7 seconds but will turn ON again within
In some cases the airbag warning light will go OFF 30 seconds. In this case continue diagnostics with
after about 7 seconds but will turn ON again within the basic diagnostics procedures or trouble code
30 seconds. In this case continue diagnostics with procedures.
the basic diagnostics procedures or trouble code : Does airbag warning light go off after
procedures. about 7 seconds and remain off for
: Does airbag warning light go off after more than 30 seconds?
about 7 seconds and remain off for : Go to step 4D6.
more than 30 seconds?
: Perform diagnostics and repair accord-
: Replace with a new driver's airbag mod- ing to indicated trouble code. Go to step 5-5 [T5A0].> Go to step 4D10.
4D10.
: Replace with a new combination switch.
and install driver's
airbag module.
Go to step 4D9.

13
5-5 [T4D8] SUPPLEMENTAL RESTRAINT SYSTEM
4. Diagnostics Chart for On-board Diagnostic System

4D8 : CHECK AIRBAG WARNING LIGHT 4D9 : CHECK AIRBAG WARNING LIGHT
ILLUMINATES. ILLUMINATES.

1) Turn ignition switch to OFF. Disconnect battery 1) Connect battery ground cable and turn ignition
ground cable, and wait 20 seconds. switch to ON.
2) Disconnect passenger's airbag module con- 2) Check airbag warning light illuminates.
nector (AB9) to (AB10). NOTE:
3) Connect test harness F connector (1F) to In some cases the airbag warning light will go OFF
(AB9). after about 7 seconds but will turn ON again within
4) Connect airbag resistor to test harness F con- 30 seconds. In this case continue diagnostics with
nector (3F). the basic diagnostics procedures or trouble code
procedures.
: Does airbag warning light go off after
about 7 seconds and remain off for
more than 30 seconds?
: Perform clear memory.
: Replace with a new driver's airbag mod-
ule. Go to step
4D10.
S5M0249A
4D10 : CHECK AIRBAG WARNING LIGHT
5) Connect battery ground cable and turn ignition ILLUMINATES.
switch to ON.
6) Check airbag warning light illuminates.
1) Connect battery ground cable and turn ignition
NOTE: switch to ON.
In some cases the airbag warning light will go OFF 2) Check airbag warning light illuminates.
after about 7 seconds but will turn ON again within NOTE:
30 seconds. In this case continue diagnostics with In some cases the airbag warning light will go OFF
the basic diagnostics procedures or trouble code after about 7 seconds but will turn ON again within
procedures. 30 seconds. In this case continue diagnostics with
: Does airbag warning light go off after the basic diagnostics procedures or trouble code
about 7 seconds and remain off for procedures.
more than 30 seconds? : Does airbag warning light go off after
: Replace with a new passenger's airbag about 7 seconds and remain off for
module. Go to more than 30 seconds?
step 4D10. : Perform clear memory.
ing to indicated trouble code. Go to step 4D10.

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