sensor SUBARU FORESTER 2004 Service Manual PDF

AB-69
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
K: DTC 32
DIAGNOSIS:
 Front sub-sensor harness circuit (LH) is shorted.is shorted, open or shorted to power supply.
 Airbag main harness circuit is shorted, open or shorted to power supply.
 Front sub-sensor (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 more than 20 seconds before starting to work.
 After replacing the airbag module, seat belt pretensioner, roll connector, control module or sensor,
reconnect each part and confirm that the airbag warning light operates properly
 When inspecting the airbag main harness, disconnect the driver’s airbag module and passenger’s
airbag module connectors for safety reasons.
WIRING DIAGRAM:
AB-00748
AB3
AB13
AB14
AB18
AB3
RHD
LHD
RHD
LHD
RHD
1526
1 2
21
LHD
RHDLHD
AB13AB18
1212
AIRBAG CONTROL MODULE
FRONT SUB SENSOR LH
1234567891011121314151617
1819202122232425262728

AB-70
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK FRONT SUB-SENSOR (LH) AND
AIRBAG HARNESS.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connector (AB3) from the
airbag control module, and connect connector
(1R) in the test harness R to connector (AB3).

3) Measure the resistance of the connector
(3R) in the test harness R.
Connector & terminal
(3R) No. 6 — (3R) No. 8: Is the resistance 750 Ω and 1
KΩ?Replace the airbag
control module.
Airbag Control
Module.>Go to step 2.
2 CHECK AIRBAG MAIN HARNESS AND
FRONT SUB-SENSOR HARNESS (LH).
1) Disconnect the connector (AB18) from the
front sub-sensor. Sensor.>
2) Connect the connector (1H) in test harness
H to connector (AB18).
3) Measure the resistance between connector
(3R) in test harness R and connector (3H) in
test harness H.
Connector & terminal
(3R) No. 6 — (3H) No. 5:
(3R) No. 8 — (3H) No. 6: Is the resistance less than 10
Ω?Go to step 3.LHD model:
Go to step 4.
RHD model:
Replace the airbag
main harness and
front sub-sensor
harness with body
harness.
3 CHECK AIRBAG MAIN HARNESS AND
FRONT SUB-SENSOR HARNESS (LH).
Measure the resistance between connector
(3R) in test harness R and the chassis ground.
Connector & terminal
(3R) No. 6 — Chassis ground:
(3R) No. 8 — Chassis ground: Is the resistance more than 1
MΩ?Go to step 8.LHD model:
Go to step 4.
RHD model:
Replace the airbag
main harness and
front sub-sensor
harness with body
harness.
4 CHECK AIRBAG MAIN HARNESS
1) Disconnect the connector (AB13) from
(AB14), and connect the connector (1L) in test
harness L to connector (AB13).
2) Measure the resistance between connector
(3R) in test harness R and connector (3L) in
test harness L.
Connector & terminal
(3R) No. 6 — (3L) No. 4:
(3R) No. 8 — (3L) No. 3: Is the resistance less than 10
Ω?Go to step 5.Replace the airbag
main harness with
body harness.
5 CHECK AIRBAG MAIN HARNESS
Measure the resistance between connector
(3R) in test harness R and the chassis ground.
Connector & terminal
(3R) No. 6 — Chassis ground:
(3R) No. 8 — Chassis ground:Is the resistance more than 1
MΩ?Go to step 6.Replace the airbag
main harness with
body harness.
6 CHECK FRONT SUB-SENSOR HARNESS
(LH).
1) Connect the connector (2L) in test harness
L to the connector (AB14).
2) Measure the resistance between connector
(3H) in test harness H and connector (3L) in
the test harness L.
Connector & terminal
(3L) No. 5 — (3H) No. 5:
(3L) No. 6 — (3H) No. 6: Is the resistance less than 10
Ω?Go to step 7.Replace the front
sub-sensor har-
ness (LH) with
body harness.

AB-71
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
7 CHECK FRONT SUB-SENSOR HARNESS
(LH).
Measure the resistance between connector
(3L) in test harness L and the chassis ground.
Connector & terminal
(3L) No. 5 — Chassis ground:
(3L) No. 6 — Chassis ground: Is the resistance more than 1
MΩ?Go to step 8.Replace the front
sub-sensor har-
ness (LH) with
body harness.
8 CHECK FRONT SUB-SENSOR (LH).
1) Connect the connector (2H) in test harness
H to front sub-sensor (LH).
2) Measure the resistance of the connector
(3H) in test harness H.
Connector & terminal
(3H) No. 3 — (3H) No. 4: Is the resistance 750 Ω and 1
KΩGo to step 9.Replace the front
sub-sensor (LH).
Front Sub Sen-
sor.>
9 CHECK FRONT SUB-SENSOR (LH).
Measure the resistance between connector
(3H) in test harness H and the chassis ground.
Connector & terminal
(3H) No. 3 — Chassis ground:
(3H) No. 4 — Chassis ground:Is the resistance more than 1
MΩ?Finish the diagno-
sis.Replace the front
sub-sensor (LH).
Front Sub Sen-
sor.> Step Check Yes No

AB-72
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
L: DTC 41
DIAGNOSIS:
 Side airbag harness (RH) is faulty.
 Side airbag module (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 more than 20 seconds before starting to work.
 After replacing the airbag module, seat belt pretensioner, roll connector, control module or sensor,
reconnect each part and confirm that the airbag warning light operates properly.
 When inspecting the airbag main harness, disconnect the driver’s airbag module and passenger’s
airbag module connectors for safety reasons.
 When inspecting the side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00627
AIRBAG CONTROL MODULEAB8
SIDE AIRBAG
SENSOR RH
INFLATOR
(SIDE RH)
AB111 2
12AB12
12
109
7
3
4
1
2
AB8
123456
789101112
AB12
3412
AB11
12

AB-74
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
M: DTC 42
DIAGNOSIS:
 Side airbag harness (LH) is faulty.
 Side 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 more than 20 seconds before starting to work.
 After replacing the airbag module, seat belt pretensioner, roll connector, control module or sensor,
reconnect each part and confirm that the airbag warning light operates properly.
 When inspecting the airbag main harness, disconnect the driver’s airbag module and passenger’s
airbag module connectors for safety reasons.
 When inspecting the side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00628
AIRBAG CONTROL MODULEAB7
SIDE AIRBAG
SENSOR LH
INFLATOR
(SIDE LH)
AB1012
6 5AB9
12 10
9 7
3
4
1
2
AB10
3412
AB9
12
AB7
123456
789101112

AB-76
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
N: DTC 45
DIAGNOSIS:
 Side airbag harness (RH) is shorted to power supply.
 Side airbag module (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 more than 20 seconds before starting to work.
 After replacing the airbag module, seat belt pretensioner, roll connector, control module or sensor,
reconnect each part and confirm that the airbag warning light operates properly.
 When inspecting the airbag main harness, disconnect the driver’s airbag module and passenger’s
airbag module connectors for safety reasons.
 When inspecting the side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00627
AIRBAG CONTROL MODULEAB8
SIDE AIRBAG
SENSOR RH
INFLATOR
(SIDE RH)
AB111 2
12AB12
12
109
7
3
4
1
2
AB8
123456
789101112
AB12
3412
AB11
12

AB-78
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
O: DTC 46
DIAGNOSIS:
 Side airbag harness (LH) is shorted to power supply.
 Side 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 more than 20 seconds before starting to work.
 After replacing the airbag module, seat belt pretensioner, roll connector, control module or sensor,
reconnect each part and confirm that the airbag warning light operates properly.
 When inspecting the airbag main harness, disconnect the driver’s airbag module and passenger’s
airbag module connectors for safety reasons.
 When inspecting the side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00628
AIRBAG CONTROL MODULEAB7
SIDE AIRBAG
SENSOR LH
INFLATOR
(SIDE LH)
AB1012
6 5AB9
12 10
9 7
3
4
1
2
AB10
3412
AB9
12
AB7
123456
789101112

AB-80
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
P: DTC 51
DIAGNOSIS:
 Side airbag sensor (RH) is faulty.
 Side airbag harness 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 more than 20 seconds before starting to work.
 After replacing the airbag module, seat belt pretensioner, roll connector, control module or sensor,
reconnect each part and confirm that the airbag warning light operates properly.
 When inspecting the airbag main harness, disconnect the driver’s airbag module and passenger’s
airbag module connectors for safety reasons.
 When inspecting the side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00627
AIRBAG CONTROL MODULEAB8
SIDE AIRBAG
SENSOR RH
INFLATOR
(SIDE RH)
AB111 2
12AB12
12
109
7
3
4
1
2
AB8
123456
789101112
AB12
3412
AB11
12

AB-81
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK SIDE AIRBAG (RH) HARNESS.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connector (AB20) from the
seat belt pretensioner (RH). Front Seat Belt.>
3) For the vehicle with lap seat belt preten-
sioner, disconnect the connector (AB25) from
lap pretensioner.
4) Disconnect the connector (AB11) from side
airbag module (RH).
5) Disconnect the connector (AB8) from the
airbag control module. Control Module.>
6) Connect the connector (1R) in test harness
R to the connector (AB8).
7) Disconnect the connector (AB12) from the
side airbag sensor (RH), and connect the con-
nector (1G) in test harness G to connector
(AB12).
8) Measure the resistance between connector
(4R) in test harness R and connector (3G) in
test harness G.
Connector & terminal
(4R) No. 5 — (3G) No. 2:
(4R) No. 6 — (3G) No. 4:
(4R) No. 7 — (3G) No. 1:
(4R) No. 8 — (3G) No. 5: Is the resistance less than 10
Ω?Go to step 2.Replace the side
airbag harness
with body harness.
2 CHECK SIDE AIRBAG HARNESS.
Measure the resistance between connector
(4R) in test harness R and the chassis ground.
Connector & terminal
(4R) No. 5 — Chassis ground:
(4R) No. 6 — Chassis ground:
(4R) No. 7 — Chassis ground:
(4R) No. 8 — Chassis ground:Is the resistance more than 1
MΩ?Replace the side
airbag sensor
(RH). 19, Side Airbag
Sensor.> When
sensor replace-
ment is not OK,
replace the airbag
control module.
Airbag Control
Module.>Replace the side
airbag harness
with body harness.

AB-82
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Q: DTC 52
DIAGNOSIS:
 Side airbag sensor (LH) is faulty.
 Side airbag harness (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 more than 20 seconds before starting to work.
 After replacing the airbag module, seat belt pretensioner, roll connector, control module or sensor,
reconnect each part and confirm that the airbag warning light operates properly.
 When inspecting the airbag main harness, disconnect the driver’s airbag module and passenger’s
airbag module connectors for safety reasons.
 When inspecting the side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00628
AIRBAG CONTROL MODULEAB7
SIDE AIRBAG
SENSOR LH
INFLATOR
(SIDE LH)
AB1012
6 5AB9
12 10
9 7
3
4
1
2
AB10
3412
AB9
12
AB7
123456
789101112