Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 651
AB(diag)-143
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
BN:DTC 9E CURTAIN AIRBAG MODULE LH FAILURE
DTC DETECTING CONDITION:
• Curtain airbag harness (LH) circuit is open.
• Curtain airbag module (LH) is faulty.
• Airbag control module is faulty.
CAUTION:
• Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the
ground cable from battery, and wait 60 seconds or more before starting to work.
• When replacing the airbag module, seat belt pretensioner, roll connector, control module and sen-
sor, reconnect each part and check that the warning light operates properly.
• When inspecting the airbag main harness, disconnect the airbag module connectors of the driver’s
and passenger’s seats for safety.
• When inspecting the airbag rear harness, disconnect the side airbag module connector, curtain
airbag module connector and seat belt pretensioner connector for safety reasons.
WIRING DIAGRAM:
Airbag system <Ref. to WI-82, WIRING DIAGRAM, Airbag System.>
Step
Check
Yes
No
1
CHECK POOR CONTACT OF CONNEC-
TORS.
Check for poor contact of the connectors
between the airbag control module, curtain air-
bag module LH and the curtain airbag sensor
LH.
Is there poor contact?
Replace the airbag
rear harness along
with body harness.
2
CHECK CURTAIN AIRBAG MODULE.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait for 60 sec-
onds or more.
2) Disconnect the connector (AB31) from cur-
tain airbag module (LH).
3) Connect the connector (1N) in the test har-
ness N to the connector (AB31).
4) Connect the airbag resistor to the connector
(2N) of test harness N.
5) Connect the battery ground terminal and
turn the ignition switch to ON.
Does the airbag warning light
illuminate for 6 seconds and go
off?
Replace the cur-
tain airbag module
(LH). <Ref. to AB-
19, Curtain Airbag
Module.>
AB-02464
AB17
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
AB31
1 2
AB23 AB32
1 2 3 4
7
6
15
AB31
AB32
AB23
8
AB17
4
3
2
1
4
3
2
1
AIRBAG CM
CURTAIN AIRBAG
SENSOR LH
CURTAIN AIRBAG
MODULE LH
SIDE AIRBAG
SENSOR LH
AB(diag)-144
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
3
CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG MODULE HARNESS LH).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait for 60 sec-
onds or more.
2) Disconnect the connector (AB21) from seat
belt pretensioner (LH).
3) Disconnect connector (AB19) from side air-
bag module (LH).
4) Disconnect the airbag resistor from test har-
ness N.
5) Disconnect the connectors (AB6, AB17,
AB18) from airbag control module.
6) Connect the connector (1AH) in the test har-
ness AH to the connectors (AB6, AB17, AB18).
7) Connect the connector (2AH) in the test har-
ness AH and the connector (1AG) in the test
harness AG.
8) Measure the resistance between connector
(5AG) in the test harness AG and connector
(2N) in the test harness N.
Connector & terminal
(5AG) No. 2 — (2N) No. 2:
(5AG) No. 4 — (2N) No. 1:
Is the resistance less than 10
Ω?
Replace the airbag
rear harness along
with body harness.
4
CHECK AIRBAG CONTROL MODULE.
1) Connect all connectors.
2) Clear the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
Is the same DTC displayed?
Replace the airbag
control module.
<Ref. to AB-21,
Airbag Control
Module.>
5
CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Finish the diagno-
sis.
Step
Check
Yes
No
AB(diag)-145
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
BO:DTC A1 FRONT SENSOR BUS COMMUNICATION ERROR
DTC DETECTING CONDITION:
• Harness between airbag control module and front sub sensor is open or shorted.
• Front sub sensor is faulty.
• Airbag control module is faulty.
CAUTION:
• Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the
ground cable from battery, and wait 60 seconds or more before starting to work.
• When replacing the airbag module, seat belt pretensioner, roll connector, control module and sen-
sor, reconnect each part and check that the warning light operates properly.
• When inspecting the airbag main harness, disconnect the airbag module connectors and seat belt
pretensioner connectors of the driver’s and passenger’s seats for safety reasons.
WIRING DIAGRAM:
Airbag system <Ref. to WI-82, WIRING DIAGRAM, Airbag System.>
Step
Check
Yes
No
1
CHECK POOR CONTACT OF CONNEC-
TORS.
Check for poor contact of the connectors
between the airbag control module and the front
sub sensor.
Is there poor contact?
Replace the airbag
main harness
along with body
harness.
AB-02465
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 29 30
1 2
AB16
AB13
29
27
30
2
8
AB6
AB16
AB13
1
2
1
2
AIRBAG CM
FRONT SUB SENSOR LH
FRONT SUB SENSOR RH
AB(diag)-146
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
2
CHECK AIRBAG MAIN HARNESS (FRONT
SENSOR BUS LH).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait for 60 sec-
onds or more.
2) Remove the instrument panel lower cover
and column cover, and disconnect the connec-
tors (AB7) and (AB2).
3) Remove the console front panel and discon-
nect the connector (AB9).
4) Disconnect the connectors (AB6, AB17,
AB18) from airbag control module.
5) Connect the connector (1AH) in the test har-
ness AH to the connectors (AB6, AB17, AB18).
6) Connect the connector (2AH) in the test har-
ness AH and the connector (1AG) in the test
harness AG.
7) Disconnect the connector (AB13) from the
front sub sensor (LH), and then connect the
connector (1H) in the test harness H to connec-
tor (AB13).
8) Measure the resistance between connector
(4AG) in the test harness AG and connector
(3H) in the test harness H.
Connector & terminal
(4AG) No. 7 — (3H) No. 5:
(4AG) No. 9 — (3H) No. 6:
Is the resistance less than 10
Ω?
Replace the airbag
main harness
along with body
harness.
3
CHECK AIRBAG MAIN HARNESS (FRONT
SENSOR BUS LH).
Measure the resistance between connector
(4AG) in the test harness AG and chassis
ground, and the resistance between connector
(4AG) terminals in the test harness AG.
Connector & terminal
(4AG) No. 7 — Chassis ground:
(4AG) No. 9 — Chassis ground:
(4AG) No. 7 — (4AG) No. 9:
Is the resistance 1 MΩ or
more?
Replace the airbag
main harness
along with body
harness.
4
CHECK AIRBAG MAIN HARNESS (FRONT
SENSOR BUS RH).
1) Disconnect the connector (1H) in the test
harness H from connector (AB13).
2) Disconnect the connector (AB16) from the
front sub sensor (RH), and then connect the
connector (1H) in the test harness H to connec-
tor (AB16).
3) Measure the resistance between connector
(4AG) in the test harness AG and connector
(3H) in the test harness H.
Connector & terminal
(4AG) No. 14 — (3H) No. 5:
(4AG) No. 12 — (3H) No. 6:
Is the resistance less than 10
Ω?
Replace the airbag
main harness
along with body
harness.
Step
Check
Yes
No
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст