2004 SUBARU FORESTER ignition

AB-94
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK PASSENGERS AIRBAG MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground cable, and wait more than 20
seconds.
2) Remove the glove box.
3) Disconnect the connector passenger’s air-
bag module from (AB4).
4) Connect the connector (1P) in test harness
K to connector (AB4).
5) Connect two airbag resistors to connectors
(2P) and (3P) in test harness P.
6) Connect the battery ground cable and turn
the ignition switch ON.Is the airbag warning light
turned on normally?Replace the pas-
senger’s airbag
module. AB-15, Passen-
ger’s Airbag Mod-
ule.>Go to step 2.
2 CHECK AIRBAG MAIN HARNESS.
1) Turn the ignition switch OFF, disconnect the
battery ground cable, and wait more than 20
seconds.
2) Disconnect two airbag resistors from the
connectors (2P) and (3P) in test harness P.
3) Remove the lower cover and disconnect the
connector (AB21) from (AB26).
4) Disconnect the connector (AB3) from the
air bag control module, and connect the con-
nector (1R) in test harness R. Airbag Control Module.>
5) Measure the resistance between connector
(2R) in test harness R and the connector (2P)
in test harness P.
Connector & terminal
(2R) No. 9 — (3P) No. 3:
(2R) No. 13 — (3P) No. 4: Is the resistance less than 10
Ω?Go to step 3.Replace the airbag
main harness
together with body
harness as a unit.
3 CHECK AIRBAG MAIN HARNESS.
Measure the resistance of the connector (2R)
in test harness R.
Connector & terminal
(2R) No. 9 — No. 13:
(2R) No. 9 — Chassis ground:
(2R) No. 13 — Chassis ground:Is the resistance more than 1
MΩ?Replace the airbag
control module.
Airbag Control
Module.>Replace the airbag
main harness
together with body
harness as a unit.

AB-95
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Z: DTC 76
DIAGNOSIS:
 Airbag main harness circuit (Passenger) is shorted to the power supply.
 Airbag module harness (Passenger) is shorted to the power supply.
 Passenger’s airbag module 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.
 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-00621
AB3 INFLATOR
(PASSENGER SIDE)
AB4
AB4
10
11 4
37
8
1
2
AIRBAG CONTROL MODULEAB3
1234567891011121314151617
1819202122232425262728
1234

AB-96
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK PASSENGERS AIRBAG MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground cable, and wait more than 20
seconds.
2) Remove the glove box.
3) Disconnect the connector (AB4) from pas-
senger’s airbag module.
4) Connect the connector (1P) in test harness
D to connector (AB4).
5) Connect two airbag resistors to connectors
(2P) and (3P) in test harness P.
6) Connect the battery ground cable and turn
the ignition switch ON. Is the airbag warning light
turned on normally?Replace the pas-
senger’s airbag
module. AB-15, Passen-
ger’s Airbag Mod-
ule.>Go to step 2.
2 CHECK AIRBAG MAIN HARNESS.
1) Turn the ignition switch OFF, disconnect the
battery ground cable, and wait more than 20
seconds.
2) Disconnect two airbag resistors from the
connectors (2P) and (3P) in test harness P.
3) Remove the lower cover and disconnect the
connector (AB21) from (AB26).
4) Disconnect the connector (AB3) from the
airbag control module, and connect the con-
nector (1R) in test harness R. Airbag Control Module.>
5) Measure the voltage between connector
(2R) in test harness R and the chassis ground.
Connector & terminal
(2R) No. 9 (+) — Chassis ground (
−):
(2R) No. 13 (+) — Chassis ground (
−): Is the voltage less than 1 V? Replace the airbag
control module.
Airbag Control
Module.>Replace the airbag
main harness
together with body
harness as a unit.

AB-97
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AA:DTC 81
DIAGNOSIS:
 Lap seat belt pretensioner circuit (RH) is open, shorted or shorted to ground.
 Lap pretensioner is faulty.
 Lap pretensioner 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 side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00749
AB8
AB25
4 1
23
AB8AB25
12
AIRBAG CONTROL MODULE
LAP SEAT BELT PRETENSIONER
FOR AUSTRALIA MODEL
123456
789101112

AB-98
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK LAP SEAT BELT PRETENSIONER.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connector (AB25) from the
lap seat belt pretensioner (RH).
3) Connect the connector (1Q) in test harness
Q to (AB25).
4) Connect the airbag resistor to connector
(2Q) in test harness Q.
5) Connect the battery ground cable, and turn
the ignition switch to ON.Is the airbag warning light
turned on normally?Replace the lap
seat belt preten-
sioner (RH). to SB-10, FRONT
OUTER SEAT
BELT WITH LAP
SEAT BELT PRE-
TENSIONER,
REMOVAL, Front
Seat Belt.>Go to step 2.
2 CHECK SIDE AIRBAG HARNESS (RH).
1) Turn the ignition switch to 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 (AB11) from side
airbag module (RH).
4) Disconnect the connectors (AB20) from
seat belt pretensioner.
5) Disconnect the connector (AB8) from air-
bag control module. Control Module.>
6) Connect the connector (1R) in test harness
R to the connector (AB8).
7) Measure the resistance between connector
(3R) in test harness R and connector (2Q) in
test harness Q.
Connector & terminal
(3R) No. 2 — (2Q) No. 2:
(3R) No. 4 — (2Q) No. 1: Is the resistance less than 10
Ω?Go to step 3.Replace the side
airbag harness
with body harness.
3 CHECK SIDE AIRBAG HARNESS.
Measure the resistance between the connector
(3R) in test harness R and the chassis ground.
Connector & terminal
(3R) No. 2 — (3R) No. 4:
(3R) No. 2 — Chassis ground:
(3R) No. 4 — Chassis ground: Is the resistance more than 1
MΩ?Replace the airbag
control module.
Airbag Control
Module.>Replace the side
airbag harness
with body harness.

AB-99
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AB:DTC 85
DIAGNOSIS:
 Lap seat belt pretensioner circuit (RH) is shorted to the power supply.
 Lap pretensioner is faulty.
 Lap pretensioner 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 side airbag harness, disconnect the side airbag module connector and seat
belt pretensioner connector for the safety reasons.
WIRING DIAGRAM:
AB-00749
AB8
AB25
4 1
23
AB8AB25
12
AIRBAG CONTROL MODULE
LAP SEAT BELT PRETENSIONER
FOR AUSTRALIA MODEL
123456
789101112

AB-100
AIRBAG SYSTEM (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK LAP SEAT BELT PRETENSIONER.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connector (AB25) from the
lap seat belt pretensioner (RH).
3) Connect the connector (1Q) in test harness
Q to (AB25).
4) Connect the airbag resistor to the connec-
tor (2Q) in test harness Q.
5) Connect the battery ground cable and turn
the ignition switch to ON.Is the airbag warning light
turned on normally?Replace the lap
seat belt preten-
sioner (RH). to SB-10, FRONT
OUTER SEAT
BELT WITH LAP
SEAT BELT PRE-
TENSIONER,
REMOVAL, Front
Seat Belt.>Go to step 2.
2 CHECK SIDE AIRBAG HARNESS (RH).
1) Turn the ignition switch to 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 (AB11) from side
airbag module (RH).
4) Disconnect the connector (AB20) from seat
belt pretensioner.
5) Disconnect the connectors (AB7) and
(AB8) from the airbag control module. AB-18, Airbag Control Module.>
6) Connect the connector (1R) in test harness
R to the connector (AB7).
7) Connect the battery ground cable and turn
the ignition switch to ON.
8) Measure the voltage between connector
(3R) in test harness R and the chassis ground.
Connector & terminal
(3R) No. 2 (+) — Chassis ground (
−):
(3R) No. 4 (+) — Chassis ground (
−): Is the voltage less than 1 V? Replace the airbag
control module.
Airbag Control
Module.>Replace the side
airbag harness
with body harness.

SB-4
SEAT BELT SYSTEM
General Description
B: CAUTION
 Before starting, turn the ignition switch to OFF,
disconnect the battery ground cable and wait for 20
seconds or more.
 The pretension system has a backup power source.
The pretensioner might deploy if you do not wait for 20
seconds or more before starting work.
 Do not drop or apply any impact to the preten-
sioner.
 If oil, grease, or water gets on the pretensioner,
wipe it off immediately with a dry cloth.
 Do not expose the pretensioner to high tempera-
ture or flame.
 Do not allow current to flow through or voltage to
reach the pretensioner. Do not use a circuit tester
to check resistance of the pretensioner.
 Do not disassemble or attempt to repair the pre-
tensioner. If it is dented, cracked, or deformed, re-
place it with a new one.
 Do not use the airbag or pretensioner parts from
other vehicles. Always replace parts with new
parts.
 When handling a seat belt with a deployed pre-
tensioner, wear gloves and goggles. Wash your
hands afterwards.
 Do not re-use a seat belt with a deployed preten-
sioner again.
 Be sure to deploy pretensioner before disposal.
sioner.>
 If the material gets in your eyes or on your skin
during deployment, wash it away with clean water,
and then consult a doctor.