Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 653
AB(diag)-151
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
BV:DTC EC SIDE SENSOR BUS RH COMMUNICATION ERROR
DTC DETECTING CONDITION:
• Open or short circuit in harness of side sensor bus (RH).
• Side airbag sensor (RH) and curtain airbag sensor (RH) are 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 approx. 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
pretensioners of the driver’s and passenger’s seats for safety reasons.
• 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
(AB18, AB28, AB34) between the airbag control
module and the curtain airbag sensor (RH).
Is there poor contact?
Replace the airbag
rear harness along
with body harness.
AB-02467
1 2
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
1 2 3 4
1 2 3 4
AB33
AB18
10
AB33
1
2
9
7
6
1
1
8
AB18
AB34
AB28
AB24
AB34
4
3
AB24
3
2
4
3
2
1
AB28
AIRBAG CM
CURTAIN AIRBAG
SENSOR RH
SIDE AIRBAG
MODULE RH
SIDE AIRBAG
SENSOR RH
CURTAIN AIRBAG
MODULE RH
AB(diag)-152
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
2
CHECK AIRBAG REAR HARNESS (BE-
TWEEN AIRBAG CONTROL MODULE AND
SIDE AIRBAG SENSOR RH).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait for 60 sec-
onds or more.
2) Disconnect the connector (AB26) from seat
belt pretensioner (RH).
3) Disconnect the connector (AB33) from cur-
tain airbag module (RH).
4) Disconnect connector (AB24) of the side
airbag module (RH).
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) Disconnect the connector (AB28) from side
airbag sensor (RH), and connect the connector
(2V) in test harness V to connector (AB28).
9) Measure the resistance between connector
(5AG) in the test harness AG and connector
(3V) in the test harness V.
Connector & terminal
(5AG) No. 14 — (3V) No. 1:
(5AG) No. 15 — (3V) No. 2:
Is the resistance less than 10
Ω?
Replace the airbag
rear harness along
with body harness.
3
CHECK AIRBAG REAR HARNESS (BE-
TWEEN AIRBAG CONTROL MODULE AND
SIDE AIRBAG SENSOR RH).
Measure the resistance between test harness
AG connectors (5AG) and chassis ground, and
the resistance between connectors (5AG) of the
test harness AG.
Connector & terminal
(5AG) No. 14 — Chassis ground:
(5AG) No. 15 — Chassis ground:
(5AG) No. 14 — (5AG) No. 15:
Is the resistance 1 MΩ or
more?
Replace the airbag
rear harness along
with body harness.
4
CHECK AIRBAG REAR HARNESS (BE-
TWEEN SIDE AIRBAG SENSOR AND CUR-
TAIN AIRBAG SENSOR RH).
1) Disconnect the connector (2V) in the test
harness V from the connector (AB28) of side
airbag sensor (RH).
2) Connect the connector (AB28) of side air-
bag sensor (RH) and the connector (1AI) in the
test harness AI.
3) Connect the connector (2AI) in the test har-
ness AI and the connector (1V) in the test har-
ness V.
4) Disconnect the connector (AB34) from cur-
tain airbag sensor (RH), and connect the con-
nector (2V) in test harness V to connector
(AB34).
5) Measure the resistance between connector
(3V) terminals in the test harness V.
Connector & terminal
(3V) No. 2 — (3V) No. 6:
(3V) No. 1 — (3V) No. 7:
Is the resistance less than 10
Ω?
Replace the airbag
rear harness along
with body harness.
Step
Check
Yes
No
AB(diag)-153
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
BW:DTC ED SIDE SENSOR BUS RH COMMUNICATION ERROR
NOTE:
Refer to DTC EE for details on DTC ED. <Ref. to AB(diag)-154, DTC EE SIDE SENSOR BUS RH COMMU-
NICATION ERROR, Diagnostic Chart with Trouble Code.>
5
CHECK AIRBAG REAR HARNESS (BE-
TWEEN SIDE AIRBAG SENSOR AND CUR-
TAIN AIRBAG SENSOR RH).
Measure the resistance between connector
(3V) in test harness V and chassis ground, and
the resistance between connector (3V) in test
harness V.
Connector & terminal
(3V) No. 2 — Chassis ground:
(3V) No. 1 — Chassis ground:
(3V) No. 2 — (3V) No. 1:
Is the resistance 1 MΩ or
more?
Replace the airbag
rear harness along
with body harness.
6
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?
7
REPLACE SIDE AIRBAG SENSOR (RH) AND
CHECK AIRBAG CONTROL MODULE AF-
TER REPLACEMENT.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait for 60 sec-
onds or more.
2) Replace the side airbag sensor (RH). <Ref.
to AB-23, REMOVAL, Side Airbag Sensor.>
3) Connect all connectors.
4) Clear the memory.
5) Perform the Inspection Mode.
6) Read the DTC.
Is the system normal?
8
CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Finish the diagno-
sis.
Step
Check
Yes
No
AB(diag)-154
Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
BX:DTC EE SIDE SENSOR BUS RH COMMUNICATION ERROR
DTC DETECTING CONDITION:
• Open or short circuit in harness of side sensor bus (RH).
• Side airbag sensor (RH) or curtain airbag sensor (RH) 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 approx. 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
pretensioners of the driver’s and passenger’s seats for safety reasons.
• 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
(AB18, AB28, AB34) between the airbag control
module and the curtain airbag sensor (RH).
Is there poor contact?
Replace the airbag
rear harness along
with body harness.
AB-02467
1 2
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
1 2 3 4
1 2 3 4
AB33
AB18
10
AB33
1
2
9
7
6
1
1
8
AB18
AB34
AB28
AB24
AB34
4
3
AB24
3
2
4
3
2
1
AB28
AIRBAG CM
CURTAIN AIRBAG
SENSOR RH
SIDE AIRBAG
MODULE RH
SIDE AIRBAG
SENSOR RH
CURTAIN AIRBAG
MODULE RH
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст