SUBARU FORESTER 1999 Service User Guide

C: CLEAR MEMORY
After eliminating problem as per trouble code, clear
memory as follows:
1) Make sure ignition switch is ON (and engine
off). Connect one DIAG. terminal ªAº on diagnosis
connector terminal No. 1.
While warning light is flashing, contact the other
DIAG. terminal ªBº on terminal No. 2 for at least
three seconds.
B5M0116D
2) After memory is cleared, normal warning light
flashing rate resumes. (Warning light flashes every
0.6 seconds ON-OFF operation.) Memory cannot
be cleared if any problem exists.
3) After clear memory and then DIAG. terminals
ªAº and ªBº, extract from diagnosis connector.
D: DIAGNOSTICS PROCEDURE
4D1 : CHECK TROUBLE CODE INDICATES.
1) Perform on-board diagnostic. [T4B0].>
2) Check trouble code indicates.
:Are trouble codes 11, 12, 15 or 16
indicated?
: Go to step4D2.
: Perform diagnostics and repair accord-
ing to indicated trouble code. 5-5 [T5A0].>
4D2 : CHECK TROUBLE CODE INDICATES.
Check trouble code indicates.
:Are trouble codes 12, 16 indicated?

: Go to step4D3.
: Go to step4D4.
12
5-5[T4C0]DIAGNOSTICS
4. Diagnostics Chart for On-board Diagnostic System

4D3 : CHECK AIRBAG WARNING LIGHT
ILLUMINATES.
1) Turn ignition switch to OFF. Disconnect battery
ground cable, and wait 20 seconds.
2) Remove glove box and
disconnect passenger's airbag module connector
(AB9) to (AB10).
3) Connect test harness F connector (1F) to
(AB9).
4) Connect airbag resistor to test harness F con-
nector (3F).
S5M0249A
5) Connect battery ground cable and turn ignition
switch to ON.
6) Check airbag warning light illuminates.
NOTE:
In some cases the airbag warning light will go OFF
after about 7 seconds but will turn ON again within
30 seconds. In this case continue diagnostics with
the basic diagnostics procedures or trouble code
procedures.
:Does airbag warning light go off after
about 7 seconds and remain off for
more than 30 seconds?
: Replace with a new passenger's airbag
module. Go to
step4D6.
: Perform diagnostics and repair accord-
ing to indicated trouble code. 5-5 [T5A0].>4D4 : CHECK AIRBAG WARNING LIGHT
ILLUMINATES.
1) Turn ignition switch to ªOFFº. Disconnect bat-
tery ground cable, and wait 20 seconds.
2) Connect connector (AB8) to (AB3).
3) Remove driver's airbag module and connect
test harness F connector (1F) to (AB7). 5-5 [W3A1].>
4) Connect airbag resistor to test harness F con-
nector (3F).
S5M0251A
5) Connect battery ground cable and turn ignition
switch to ON.
6) Check airbag warning light illuminates.
NOTE:
In some cases the airbag warning light will go OFF
after about 7 seconds but will turn ON again within
30 seconds. In this case continue diagnostics with
the basic diagnostics procedures or trouble code
procedures.
:Does airbag warning light go off after
about 7 seconds and remain off for
more than 30 seconds?
: Replace with a new driver's airbag mod-
ule. Go to step
4D6.
: Go to step4D5.
13
[T4D4]5-5DIAGNOSTICS
4. Diagnostics Chart for On-board Diagnostic System

4D5 : CHECK AIRBAG WARNING LIGHT
ILLUMINATES.
1) Turn ignition switch to OFF. Disconnect battery
ground cable, and wait 20 seconds.
2) Remove lower cover panel and connect test
harness F connector (1F) to (AB8) [W1A0].> with airbag resistor attached to test har-
ness F connector (3F).
S5M0250A
3) Connect battery ground cable and turn ignition
switch to ON.
4) Check airbag warning light illuminates.
NOTE:
In some cases the airbag warning light will go OFF
after about 7 seconds but will turn ON again within
30 seconds. In this case continue diagnostics with
the basic diagnostics procedures or trouble code
procedures.
:Does airbag warning light go off after
about 7 seconds and remain off for
more than 30 seconds?
: Replace with a new roll connector. to 5-5 [W800].> Go to step4D6.
: Perform diagnostics and repair accord-
ing to indicated trouble code. 5-5 [T5A0].>4D6 : CHECK AIRBAG WARNING LIGHT
ILLUMINATES.
1) Connect battery ground cable and turn ignition
switch to ON.
2) Check airbag warning light illuminates.
NOTE:
In some cases the airbag warning light will go OFF
after about 7 seconds but will turn ON again within
30 seconds. In this case continue diagnostics with
the basic diagnostics procedures or trouble code
procedures.
:Does airbag warning light go off after
about 7 seconds and remain off for
more than 30 seconds?
: Perform clear memory. [T4C0].>
: Go to step4D1.
14
5-5[T4D5]DIAGNOSTICS
4. Diagnostics Chart for On-board Diagnostic System

5. Diagnostics Chart with Trouble Code
A: TROUBLE CODES
1. LIST OF TROUBLE CODES
Trouble code/
Contents of troublesMemory function Contents of diagnosis Index No.
11 Provided.IAirbag main harness circuit is open, shorted or
shorted to ground.
IAirbag module harness (driver) circuit is open,
shorted or shorted to ground.
IRoll connector circuit is open, shorted or shorted
to ground.
IAirbag control module is faulty.
12 Provided.IAirbag main harness circuit is open, shorted or
shorted to ground.
IAirbag module harness (passenger) circuit is
open, shorted or shorted to ground.
IAirbag control module is faulty.
15 Provided.IAirbag main harness circuit (driver) is shorted to
power supply.
IAirbag module harness (driver) is shorted to
power supply.
IRoll connector is shorted to power supply.
IAirbag control module is faulty.
16 Provided.IAirbag main harness circuit (passenger) is
shorted to power supply.
IAirbag module harness (passenger) is shorted to
power supply.
IAirbag control module is faulty.
21 Provided. Airbag control module is faulty.
22 Provided. Front airbag module is inflated.
23 Not provided.(AB6), (AB17) and (AB18) are not connected prop-
erly to airbag control module.
24 Not provided.IAirbag control module is faulty.
IAirbag main harness circuit is open.
IFuse No. 11 (in joint box) is blown.
IBody harness circuit is open.
25 Provided.IAirbag control module is faulty.
IAirbag main harness circuit is open.
IFuse No. 6 (in joint box) is blown.
IBody harness circuit is open.
31 Provided.IFront sub sensor harness (RH) circuit is shorted.
IFront sub sensor harness (RH) circuit is open.
IFront sub sensor (RH) is faulty.
IAirbag control module is faulty.
32 Provided.IFront sub sensor harness (LH) circuit is shorted.
IFront sub sensor harness (LH) circuit is open.
IFront sub sensor (LH) is faulty.
IAirbag control module is faulty.
41 Provided.ISide airbag harness (RH) is faulty.
ISide airbag module (RH) is faulty.
IAirbag control module is faulty.
42 Provided.ISide airbag harness (LH) is faulty.
ISide airbag module (LH) is faulty.
IAirbag control module is faulty.
45 Provided.ISide airbag harness (RH) is faulty.
IAirbag control module is faulty.
15
[T5A1]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

Trouble code/
Contents of troublesMemory function Contents of diagnosis Index No.
46 Provided.ISide airbag harness (LH) is faulty.
IAirbag control module is faulty.
51 Provided.ISide airbag sensor (RH) is faulty.
ISide airbag harness (RH) is faulty.
IAirbag control module is faulty.
52 Provided.ISide airbag sensor (LH) is faulty.
ISide airbag harness (LH) is faulty.
IAirbag control module is faulty.
53 Provided. Side airbag sensor (RH) is faulty.
54 Provided. Side airbag sensor (LH) is faulty.
55 Provided. Side airbag module is inflated.
Airbag warning light remains
on.Not provided.IAirbag warning light is faulty.
IAirbag control module to airbag warning light
harness circuit is shorted or open.
IGrounding circuit is faulty.
IAirbag control module is faulty.
I(AB1) and (B31) are not connected properly.
I(AB6) is not connected properly to airbag control
module.
Airbag warning light remains
off.Not provided.IFuse No. 5 (in main fuse box) is blown.
IBody harness circuit is open.
IAirbag warning light is faulty.
IAirbag main harness is faulty.
IAirbag control module is faulty.
Warning light indicates
trouble code, then normal
code. (Flashing trouble
code.)Provided. Airbag system component parts are faulty.
Warning light indicates
trouble code, then normal
code. (Flashing normal
code.)Not provided.IAirbag connector is faulty.
IFuse No. 11 (in joint box) is blown.
IAirbag main harness is faulty.
IAirbag control module is faulty.
IBody harness is faulty.
2. HOW TO READ TROUBLE CODES
The AIRBAG warning light flashes a code corresponding to the faulty parts.
The long segment (1.2 sec on) indicates a ªtenº, and the short segment (0.3 sec on) indicates a ªoneº.
B5M0117A
16
5-5[T5A2]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

B: TROUBLE CODE 11
DIAGNOSIS:
IAirbag main harness circuit is open, shorted or
shorted to ground.
IAirbag module harness (Driver) circuit is open,
shorted or shorted to ground.
IRoll connector circuit is open, shorted or shorted
to ground.
IAirbag control module is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
After 20 seconds elapse, remove instrument
panel lower cover, and disconnect (AB3) and
(AB8), (AB9) and (AB10).5B1 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Remove lower cover panel [W1A0].>, and connect connector (AB8) below
steering column to test harness F connector (1F).
S5M0258A
2) Disconnect connector (AB6) [W6A0].> from airbag control module, and connect
it to test harness I or I2 connector (1I) terminal.
3) Measure resistance between test harness I or
I2 connector (2I) and test harness F connector (3F)
terminals.
Connector & terminal
(2I) No. 1 Ð (3F) No. 3:
S5M0259B
:Is resistance less than 10W?
: Go to step5B2.
: Replace airbag main harness. 5-5 [W4A0].>
17
[T5B1]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5B2 : AIRBAG MAIN HARNESS INSPEC-
TION
Measure resistance between test harness I or I2
connector (2I) and test harness F connector (3F)
terminals.
Connector & terminal
(2I) No. 4 Ð (3F) No. 4:
S5M0260B
:Is resistance less than 10W?
: Go to step5B3.
: Replace airbag main harness. 5-5 [W4A0].>
5B3 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Disconnect connector (AB6) from airbag control
module , and connect it to
test harness I or I2 connector (1I).
2) Measure resistance between test harness I or
I2 connector (2I) terminal.
Connector & terminal
(2I) No. 1 Ð No. 4:
S5M0261B
:Is resistance more than 1 MW?
: Go to step5B4.
: Replace airbag main harness. 5-5 [W4A0].>5B4 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Disconnect connector (AB6) from airbag control
module , and connect it to
test harness I or I2 connector (1I).
2) Measure resistance between test harness I or
I2 connector (2I) terminals and chassis ground.
Connector & terminal
(2I) No. 4 (+) Ð Chassis ground (þ):
S5M0276B
:Is resistance more than 1 MW?
: Go to step5B5.
: Replace airbag main harness. 5-5 [W4A0].>
5B5 : AIRBAG MAIN HARNESS INSPEC-
TION
Measure resistance between test harness I or I2
connector (2I) terminals and chassis ground.
Connector & terminal
(2I) No. 1 (+) Ð Chassis ground (þ):
S5M0277B
:Is resistance more than 1 MW?
: Replace airbag control module. 5-5 [W6A0].>
: Replace airbag main harness. 5-5 [W4A0].>
18
5-5[T5B2]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

C: TROUBLE CODE 12
DIAGNOSIS:
IAirbag main harness circuit is open, shorted or
shorted to ground.
IAirbag module harness (Passenger) circuit is
open, shorted or shorted to ground.
IAirbag control module is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
After 20 seconds elapse, remove instrument
panel lower cover, and disconnect (AB3) and
(AB8), (AB9) and (AB10).
5C1 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Remove glove box.
2) Disconnect connector (AB9) and (AB10) to 5-5 [W3A2].> and connect connector (AB9) to
test harness F connector (1F).
3) Disconnect connector (AB6) [W6A0].> from airbag control module, and connect
it to test harness I or I2 connector (1I) terminal.
4) Measure resistance between test harness I or
I2 connector (2I) and test harness F connector (3F)
terminals.
Connector & terminal
(2I) No. 2 Ð (3F) No. 3:
S5M0262B
:Is resistance less than 10W?
: Go to step5C2.
: Replace airbag main harness. 5-5 [W4A0].>5C2 : AIRBAG MAIN HARNESS INSPEC-
TION
Measure resistance between test harness I or I2
connector (2I) and test harness F connector (3F)
terminals.
Connector & terminal
(2I) No. 5 Ð (3F) No. 4:
S5M0263B
:Is resistance less than 10W?
: Go to step5C3.
: Replace airbag main harness. 5-5 [W4A0].>
5C3 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Disconnect connector (AB6) from airbag control
module , and connect it to
test harness I or I2 connector (1I).
2) Measure resistance between test harness I or
I2 connector (2I) terminal.
Connector & terminal
(2I) No. 2 Ð No. 5:
S5M0252B
:Is resistance more than 10 kW?
: Go to step5C4.
: Replace airbag main harness. 5-5 [W4A0].>
19
[T5C3]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5C4 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Disconnect connector (AB6) from airbag control
module , and connect it to
test harness I or I2 connector (1I).
2) Measure resistance between test harness I or
I2 connector (2I) terminals and chassis ground.
Connector & terminal
(2I) No. 2 (+) Ð Chassis ground (þ):
S5M0278B
:Is resistance more than 1 MW?
: Go to step5C5.
: Replace airbag main harness. 5-5 [W4A0].>
5C5 : AIRBAG MAIN HARNESS INSPEC-
TION
Measure resistance between test harness I or I2
connector (2I) terminals and chassis ground.
Connector & terminal
(2I) No. 5 (+) Ð Chassis ground (þ):
S5M0279B
:Is resistance more than 1 MW?
: Replace airbag control module. 5-5 [W6A0].>
: Replace airbag main harness. 5-5 [W4A0].>
D: TROUBLE CODE 15
DIAGNOSIS:
IAirbag main harness circuit (Driver) is shorted to
power supply.
IAirbag module harness (Driver) is shorted to
power supply.
IRoll connector is shorted to power supply.
IAirbag control module is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal and then wait at least
20 seconds.
After 20 seconds elapse, remove instrument
panel lower cover, and disconnect (AB3) and
(AB8), (AB9) and (AB10).
5D1 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Disconnect connector (AB6) from airbag control
module , and connect it to
test harness I or I2 connector (1I).
2) Connect battery ground cable and turn ignition
switch ªONº (engine off).
3) Measure voltage across each test harness I or
I2 connector (2I) terminal and chassis ground.
Connector & terminal
(2I) No. 4 (+) Ð Chassis ground (þ):
S5M0280B
:Is voltage less than 1 V?
: Go to step5D2.
: Replace airbag main harness. 5-5 [W4A0].>
20
5-5[T5C4]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5D2 : AIRBAG MAIN HARNESS INSPEC-
TION
Measure voltage across each test harness I or I2
connector (2I) terminal and chassis ground.
Connector & terminal
(2I) No. 1 (+) Ð Chassis ground (þ):
S5M0281B
:Is voltage less than 1 V?
: Replace airbag control module. 5-5 [W6A0].>
: Replace airbag main harness. 5-5 [W4A0].>
E: TROUBLE CODE 16
DIAGNOSIS:
IAirbag main harness circuit (Passenger) is
shorted to power supply.
IAirbag module harness (Passenger) is shorted
to power supply.
IAirbag control module is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal and then wait at least
20 seconds.
After 20 seconds elapse, remove instrument
panel lower cover, and disconnect (AB3) and
(AB8), (AB9) and (AB10).
5E1 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Disconnect connector (AB6) from airbag control
module , and connect it to
test harness I or I2 connector (1I).
2) Connect battery ground cable and turn ignition
switch ªONº (engine off).
3) Measure voltage across each test harness I or
I2 connector (2I) terminal and chassis ground.
Connector & terminal
(2I) No. 2 (+) Ð Chassis ground (þ):
S5M0274B
:Is voltage less than 1 V?
: Go to step5E2.
: Replace airbag main harness. 5-5 [W4A0].>
21
[T5E1]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code