Subaru Legacy III (2000-2003 year). Service manual — part 912
AB-74
AIRBAG SYSTEM (DIAGNOSTICS)
DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
W: DTC 65
DIAGNOSIS:
• Seat belt pretensioner (RH) circuit is shorted to the power supply.
• Pretensioner is faulty.
• Pretensioner harness is faulty.
• Airbag control module is faulty.
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 side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
6
5
PRETENSIONER RH
1
2
AIRBAG CONTROL MODULE
AB18
AB26
AB26
AB18
1 2
1 2 3 4 5 6
7 8 9 10 11 12
AB-00301
AB-75
AIRBAG SYSTEM (DIAGNOSTICS)
DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
Value
Yes
No
1
CHECK SEAT BELT PRETENSIONER.
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more
than 20 seconds.
2) Disconnect the connector (AB26) from the
seat belt pretensioner (RH). <Ref. to SB-7,
Front Seat Belt.>
3) Connect the connector (1F) in test harness
F to (AB26).
4) Connect the airbag resistor to connector
(3F) in test harness F.
5) Connect the battery ground cable, and turn
the ignition switch ON.
Does the airbag warning light operate prop-
erly?
Operates properly.
Replace seat belt
pretensioner (RH).
<Ref. to SB-7,
Front Seat Belt.>
2
CHECK SIDE AIRBAG HARNESS (RH).
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more
than 20 seconds.
2) Disconnect the airbag resistor from the test
harness.
3) Disconnect the connector (AB25) from
(AB24).
4) Disconnect the connectors (AB17) and
(AB18) from the airbag control module.
<Ref. to AB-17, Airbag Control Module.>
5) Connect the connector (1I) in test harness
I2 to the connector (AB18).
6) Connect the battery ground cable and turn
the ignition switch ON.
7) Measure the voltage between connector
(3I) in test harness I2 and the chassis
ground.
Connector & terminal
(3I) No. 6 (+) — Chassis ground (
−−−−
):
(3I) No. 8 (+) — Chassis ground (
−−−−
):
Is the measured value less than the speci-
fied value?
1 V
Replace the airbag
control module.
<Ref. to AB-17,
Airbag Control
Module.>
Replace side air-
bag harness.
<Ref. to AB-16,
Side Airbag Har-
ness.>
AB-76
AIRBAG SYSTEM (DIAGNOSTICS)
DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
X: DTC 66
DIAGNOSIS:
• Seat belt pretensioner (LH) circuit is shorted to the power supply.
• Pretensioner is faulty.
• Pretensioner harness is faulty.
• Airbag control module is faulty.
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 the sensor, reconnect each
part and confirm that the warning light operates properly.
• When inspecting the side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00302
1
2
PRETENSIONER LH
1
2
AIRBAG CONTROL MODULE
AB17
AB21
AB21
AB17
1 2
1 2 3 4 5 6
7 8 9 10 11 12
AB-77
AIRBAG SYSTEM (DIAGNOSTICS)
DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
Value
Yes
No
1
CHECK SEAT BELT PRETENSIONER.
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more
than 20 seconds.
2) Disconnect the connector (AB21) from the
seat belt pretensioner (LH). <Ref. to SB-7,
Front Seat Belt.>
3) Connect the connector (1F) in test harness
F to (AB21).
4) Connect the airbag resistor to the connec-
tor (3F) in test harness F.
5) Connect the battery ground cable and turn
the ignition switch ON.
Does the airbag warning light operate prop-
erly?
Operates properly.
Replace seat belt
pre-tensioner (LH).
<Ref. to SB-7,
Front Seat Belt.>
2
CHECK SIDE AIRBAG HARNESS (LH).
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more
than 20 seconds.
2) Disconnect the airbag resistor from the test
harness.
3) Disconnect the connector (AB20) from
(AB19).
4) Disconnect the connectors (AB17) and
(AB18) from the airbag control module.
<Ref. to AB-17, Airbag Control Module.>
5) Connect the connector (1I) in test harness
I2 to the connector (AB17).
6) Connect the battery ground cable and turn
the ignition switch ON.
7) Measure the voltage between connector
(3I) in test harness I2 and the chassis
ground.
Connector & terminal
(3I) No. 11 (+) — Chassis ground (
−−−−
):
(3I) No. 13 (+) — Chassis ground (
−−−−
):
Is the measured value less than the speci-
fied value?
1 V
Replace the airbag
control module.
<Ref. to AB-17,
Airbag Control
Module.>
Replace side air-
bag harness.
<Ref. to AB-16,
Side Airbag Har-
ness.>
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст