Subaru Legacy III (2000-2003 year). Service manual — part 899
AB-22
AIRBAG SYSTEM (DIAGNOSTICS)
CLEAR MEMORY MODE
9. Clear Memory Mode
A: OPERATION
1) Turn the ignition switch ON.
2) Connect the diagnosis terminal to diagnosis con-
nector terminal No. 2 in the driver's seat lower cov-
er area.
3) While the warning light flashes, connect another
diagnosis terminal to diagnosis connector terminal
No. 3.
4) Once the memory is erased, the warning light re-
turns to the normal flash rate (0.6 sec on). The fail-
ure to recover the normal flash rate indicates that
trouble parts still remain. Having repaired such
parts, erase the memory again and confirm that the
normal flash rate has returned.
5) When the memory has been cleared, disconnect
the diagnosis terminal from the diagnosis connec-
tor.
6) Wind tape around the diagnosis terminal and re-
turn it to its original position.
(1) Diagnosis connector
(2) DIAG. terminal
AB-00290
1 2
3
8
7
6
5
4
B82
( 1 )
( 2 )
AB-23
AIRBAG SYSTEM (DIAGNOSTICS)
CLEAR MEMORY MODE
MEMO:
AB-24
AIRBAG SYSTEM (DIAGNOSTICS)
AIRBAG WARNING LIGHT FAILURE
10.Airbag Warning Light Failure
A: AIRBAG WARNING LIGHT REMAINS ON.
DIAGNOSIS:
• Airbag warning light is faulty.
• Airbag control module to airbag warning light circuit is shorted or open.
• Grounding circuit is faulty.
• Airbag control module is faulty.
• (AB1) and (B31) are not connected properly.
• (AB6) is not connected properly to airbag control module.
CAUTION:
• Before diagnosing the airbag system, be sure to turn the ignition switch OFF, disconnect the
ground cable from the battery, and wait more than 20 seconds before starting to work.
• Before replacing the airbag module, roll connector, control module, and sensor, reconnect each
part and confirm that the warning light operates properly.
• When inspecting the airbag main harness, disconnect the airbag module connector of the driver
and passenger seats for safety reasons.
WIRING DIAGRAM:
IGNITION RELAY
AB-00356
3
B
A
TTER
Y
AIRBAG
INDICATOR
LIGHT
AIRBAG
CIRCUIT
i10
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
AB6
1 2 3
4 5 6
7 8 9 10 11 12 13 14 15 16 17
18 19 20 21 22 23 24 25 26 27 28
AIRBAG CONTROL MODULE
AB6
B31
AB1
1
C3
i1
B36
I1
A:
B:
i10
i11
C:
i12
B31
1 2
3 4 5
6 7 8 9 10 11 12
i12
1 2 3
4 5 6
7 8 9 10 11 12 13 14
B36
B4 B5 B6
A4 A5 A6
C5 C6
F6
D4 D5 D6
F1
H1
C4
G6
G1
C2
K1
M1 M2
K6
L1
D1 D2
A1 A2
B1 B2
I6
J6
L2
I1
J1
H6
M4 M5 M6
L4 L5 L6
N5 N6
O4 O5 O6
N4
P4 P5
N2
O1 O2
P1 P2
N3
O3
P3
P6
A3
B3
C3
E4 E5 E6
E1 E2
*
*
: 4-CYLINDER
: 6-CYLINDER LHD
: 6-CYLINDER RHD : C11
: B8
: A5
i11
1 2 3 4
5 6 7
8 9 10 11 12 13 14 15 16
AB-25
AIRBAG SYSTEM (DIAGNOSTICS)
AIRBAG WARNING LIGHT FAILURE
Step
Value
Yes
No
1
CHECK POOR CONTACT IN CONNECTORS
(AB1) AND (B31).
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more
than 20 seconds.
2) Remove side sill cover. (Driver's side)
3) Confirm that firm contact is secured
between connectors (AB1) and (B31).
Is the poor contact in connectors (AB1) and
(B31)?
There is no poor contact.
Repair the body
harness or replace
airbag main har-
ness. <Ref. to AB-
15, Main Har-
ness.>
2
CHECK POOR CONTACT.
Confirm that firm contact is secured between
the air bag control module and the connector
(AB6). <Ref. to AB-17, REMOVAL, Airbag
Control Module.>
Is the poor contact in connector (AB6)?
There is no poor contact.
Replace airbag
main harness.
<Ref. to AB-15,
Main Harness.> Or
replace the airbag
control module.
<Ref. to AB-17,
Airbag Control
Module.>
3
CHECK AIRBAG MAIN HARNESS.
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more
than 20 seconds.
2) Connect the connector (AB1) to (B31).
3) Disconnect connectors (AB3) and (AB8).
4) Pull out the two stopper pins and lower the
glove box and disconnect connectors
(AB10) and (AB9).
5) Disconnect the connector (AB6) from the
airbag control module, and connect the
connector (1I) in test harness I2. <Ref. to
AB-17, Airbag Control Module.>
6) Connect the battery ground cable and turn
the ignition switch ON.
7) Connect connectors (4I) and (5I) in test har-
ness I2.
NOTE:
After problem has been eliminated, disconnect
connectors (4I) and (5I).
Is the airbag warning light turned off?
Airbag warning light turns
OFF.
Replace airbag
main harness.
<Ref. to AB-15,
Main Harness.> Or
replace combina-
tion meter printed
circuit. <Ref. to
IDI-14, Combina-
tion Meter Assem-
bly.> Or repair the
body harness.
4
CHECK AIRBAG MAIN HARNESS.
1) Connect the connector (AB1) to (B31).
2) Disconnect the connector (AB6) from the
airbag control module, and connect the
connector (1I) in test harness I2. <Ref. to
AB-17, Airbag Control Module.>
3) Measure the resistance between connector
(2I) in test harness I2 and the chassis
ground.
Connector & terminal
(2I) No. 9 — Chassis ground:
(2I) No. 10 — Chassis ground:
Is the measured value less than the speci-
fied value?
10
Ω
Replace the airbag
control module.
<Ref. to AB-17,
Airbag Control
Module.>
Replace airbag
main harness.
<Ref. to AB-15,
Main Harness.> Or
repair the body
harness.
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