light SUBARU FORESTER 1999 Service User Guide

5O3 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure voltage across connector (3I) terminal
and chassis ground.
Connector & terminal
(3I) No. 9 (+) Ð Chassis ground (±):
B5M0777A
:Is the voltage less than 1 V?
: Replace airbag control module. 5-5 [W6A0].>
: Replace side airbag harness (RH).

P: TROUBLE CODE 46
DIAGNOSIS:
ISide airbag harness (LH) is faulty.
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.
5P1 : SIDE AIRBAG MODULE INSPECTION
1) Disconnect connector (AB19) and (AB20), and
then connect connector (AB19) and test harness F
connector (1F).
2) Connect test harness F connector (3F) and air-
bag resistor.
3) Connect battery ground cable and then turn
ignition switch ON.
:Does the airbag warning light go off
after about 7 seconds and remain off
for more than 30 seconds?
: Replace front seat with side airbag mod-
ule (LH).
: Go to step5P2.
44
5-5[T5O3]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5Q12 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 20 (+) Ð Chassis ground (±):
B5M0779A
:Is the resistance more than 1 MW?
: Go to step5Q13.
: Replace side airbag harness (RH).

5Q13 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 17 (+) Ð Chassis ground (±):
B5M0531B
:Is the resistance more than 1 MW?
: Go to step5Q14.
: Replace side airbag harness (RH).
5Q14 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 19 (+) Ð Chassis ground (±):
B5M0532B
:Is the resistance more than 1 MW?
: Replace side airbag sensor (RH). to 5-5 [W7A0].> Go to step5Q15.
: Replace side airbag harness (RH).

5Q15 : SIDE AIRBAG HARNESS (RH)
INSPECTION
1) Connect connector (AB24) and (AB25).
2) Connect connector (AB18) and airbag control
module.
3) Connect connector (AB28) and side airbag sen-
sor.
4) Connect battery ground cable and then turn
ignition switch to ON (engine OFF).
:Does the airbag warning light go off
after about 7 seconds and remain off
for more than 30 seconds?
: Perform clear memory. [T4C0].>
: Replace airbag control module. 5-5 [W6A0].>
49
[T5Q15]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5R12 : SIDE AIRBAG HARNESS (LH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 5 (+) Ð Chassis ground (±):
B5M0781A
:Is the resistance more than 1 MW?
: Go to step5R13.
: Replace side airbag harness (LH). to 5-5 [W5A0].>
5R13 : SIDE AIRBAG HARNESS (LH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 14 (+) Ð Chassis ground (±):
B5M0537B
:Is the resistance more than 1 MW?
: Go to step5R14.
: Replace side airbag harness (LH). to 5-5 [W5A0].>5R14 : SIDE AIRBAG HARNESS (LH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 16 (+) Ð Chassis ground (±):
B5M0538B
:Is the resistance more than 1 MW?
: Replace side airbag sensor (LH). to 5-5 [W7A0].> Go to step5R15.
: Replace side airbag harness (LH). to 5-5 [W5A0].>
5R15 : SIDE AIRBAG HARNESS (LH)
INSPECTION
1) Connect connector (AB19) and (AB20).
2) Connect connector (AB17) and airbag control
module.
3) Connect connector (AB23) and side airbag sen-
sor.
4) Connect battery ground cable and then turn
ignition switch to ON (engine OFF).
:Does the airbag warning light go off
after about 7 seconds and remain off
for more than 30 seconds?
: Perform clear memory. [T4C0].>
: Replace airbag control module. 5-5 [W6A0].>
53
[T5R15]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

S: TROUBLE CODE 53
DIAGNOSIS:
Side airbag sensor (RH) is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal, and then wait at least
20 seconds.
5S1 : CHECK IF TROUBLE CODE 53 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. [T4A0].>
:Is airbag warning light trouble code
53 indicated?
: Replace side airbag sensor (RH). to 5-5 [W7A0].>
: Perform clear memory. [T4C0].>
T: TROUBLE CODE 54
DIAGNOSIS:
Side airbag sensor (LH) is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal, and then wait at least
20 seconds.
5T1 : CHECK IF TROUBLE CODE 54 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. [T4A0].>
:Is airbag warning light trouble code
54 indicated?
: Replace side airbag sensor (LH). to 5-5 [W7A0].>
: Perform clear memory. [T4C0].>
54
5-5[T5S0]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

U: TROUBLE CODE 55
DIAGNOSIS:
Side airbag module is inflated.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
5U1 : CHECK IF TROUBLE CODE 55 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. [T4A0].>
:Is airbag warning light trouble code
55 indicated?
: Replace front seat with side airbag mod-
ule (Operating side) [W100].>, side airbag sensor (Operating
side) and airbag
control module.
: Perform clear memory. [T4C0].>
V: AIRBAG WARNING LIGHT
REMAINS ON.
DIAGNOSIS:
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.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
5V1 : CHECK POOR CONTACT IN CON-
NECTORS (AB1) AND (B31).
1) Remove front pillar lower trim (Driver side).
2) Check poor contact in connectors (AB1) and
(B31).
B5M0122B
:Is there poor contact in double lock
of connectors (AB1) and (B31)?
: Repair poor contact in double lock of
connectors (AB1) and (B31).
: Go to step5V2.
55
[T5V1]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5V2 : INSPECTION OF AIRBAG WARNING
LIGHT
1) Turn ignition switch ªOFFº and connect body
harness connector (B31) to test connector A con-
nector (1A).
S5M0282A
2) Connect battery ground cable and turn ignition
switch ªONº, (engine off) and connect connectors
(3A) and (4A).
G5M0455
:Does the airbag warning light come
off?
: Go to step5V4.
: Go to step5V3.5V3 : INSPECTION OF BODY HARNESS
Check body harness.
NOTE:
After problem has been eliminated, disconnect
connectors (3A) and (4A).
S5M0283A
:Is there anything unusual to body
harness?
: Repair body harness.
: Replace airbag warning light bulb to 6-2 [W8B0].> or combination meter
printed circuit.
5V4 : CHECK POOR CONTACT IN CON-
NECTOR (AB6).
Check connector (AB6) connected to airbag con-
trol module.
:Is there poor contact in connector
(AB6)?
: Repair poor contact in connector (AB6).
: Go to step5V5.
56
5-5[T5V2]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5V5 : INSPECTION OF AIRBAG MAIN HAR-
NESS
1) Turn ignition switch ªOFFº, disconnect battery
ground cable and then wait at least 20 seconds,
and re-connect connectors (AB1) and (B31).
2) Remove instrument panel lower cover and dis-
connect (AB3) with (AB8) and (AB9) with (AB10),
then disconnect connector (AB6) from airbag con-
trol module, and connect it
to test harness I or I2 connector (1I).
3) Connect battery ground cable and turn ignition
switch ªONº, (engine off) and connect connectors
(4I) and (5I).
NOTE:
After problem has been eliminated, disconnect
connectors (4I) and (5I).
S5M0268B
:Does the airbag warning light come
off?
: Go to step5V6.
: Replace airbag main harness. 5-5 [W4A0].>5V6 : GROUNDING CIRCUIT INSPECTION
1) Turn ignition switch ªOFFº, disconnect battery
ground cable and then wait at least 20 seconds.
2) Disconnect connector (AB1) from body harness
connector (B31), and connect connector (B31) to
test harness A connector (1A).
3) Measure resistance between connector (5A)
terminal and chassis ground.
Connector & terminal
(5A) No. 17 (+) Ð Chassis ground (þ):
S5M0269A
:Is resistance less than 10W?
: Go to step5V7.
: Repair body grounding circuit.
5V7 : GROUNDING CIRCUIT INSPECTION
Measure resistance between connector (5A) termi-
nal and chassis ground.
Connector & terminal
(5A) No. 18 (+) Ð Chassis ground (þ):
S5M0270A
:Is resistance less than 10W?
: Go to step5V8.
: Repair body grounding circuit.
57
[T5V7]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5V8 : INSPECTION OF AIRBAG MAIN HAR-
NESS
1) Connect connectors (AB1) and (B31). Discon-
nect connector (AB6) from airbag control module
, and connect it to test har-
ness I or I2 connector (1I).
2) Measure resistance between each test harness
I or I2 connector (2I) terminal and chassis ground.
Connector & terminal
(2I) No. 9 (+) Ð Chassis ground (þ):
S5M0271B
:Is resistance less than 10W?
: Go to step5V9.
: Replace airbag main harness. 5-5 [W4A0].>
5V9 : INSPECTION OF AIRBAG MAIN HAR-
NESS
Measure resistance between each test harness I
or I2 connector (2I) terminal and chassis ground.
Connector & terminal
(2I) No. 10 (+) Ð Chassis ground (þ):
S5M0272B
:Is resistance less than 10W?
: Replace airbag control module. 5-5 [W6A0].>
: Replace airbag main harness. 5-5 [W4A0].>
W: AIRBAG WARNING LIGHT
REMAINS OFF.
DIAGNOSIS:
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.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal, and then wait at least
20 seconds.
5W1 : FUSE NO. 5 (IN MAIN FUSE BOX)
INSPECTION
Remove and visually check fuse No. 5 (In main
fuse box).
S5M0273A
:Is fuse No. 5 blown?
: Replace fuse No. 5. If fuse No. 5 blows
again, Go to step5W2.
: Go to step5W2.
5W2 : BODY HARNESS INSPECTION
Turn ignition switch ªONº (engine off) to make sure
other warning lights (in combination meter) illumi-
nate.
:Do all the warning lights (in combina-
tion meter) except airbag warning
light come on?
: Go to step5W3.
: Repair body harness.
58
5-5[T5V8]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5W3 : AIRBAG WARNING LIGHT MODULE
(IN COMBINATION METER) INSPEC-
TION
1) Turn ignition switch ªOFFº, disconnect battery
ground cable and then wait at least 20 seconds.
2) Disconnect body harness connector (B31) from
connector (AB1) located at front pillar lower (driver
side).
B5M0122B
3) Connect battery ground cable and turn ignition
switch ªONº (engine off) to make sure airbag warn-
ing light illuminates.
S5M0283A
:Does the airbag warning light come
on?
: Go to step5W4.
: Replace airbag warning light bulb to 6-2 [W8B0].> or combination meter
printed circuit.5W4 : AIRBAG MAIN HARNESS INSPEC-
TION
1) Turn ignition switch ªOFFº, disconnect battery
ground cable and then wait at least 20 seconds.
2) Connect body harness connector (B31) and
connector (AB1).
3) Disconnect connector (AB6) from airbag control
module.
4) Connect battery ground cable and turn ignition
switch ªONº to make sure airbag warning light illu-
minates.
:Does the airbag warning light come
on?
: Replace airbag control module. 5-5 [W6A0].>
: Replace airbag main harness. 5-5 [W4A0].>
59
[T5W4]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

X: WARNING LIGHT INDICATES
TROUBLE CODE, THEN NORMAL
CODE. (FLASHING TROUBLE
CODE.)
DIAGNOSIS:
Airbag system component parts are faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable, and then wait at least 20
seconds.5X1 : AIRBAG COMPONENT PARTS
APPEARANCE INSPECTION
1) Conduct on-board diagnostic and call up
trouble codes stored in memory. [T4B0].>
2) Select trouble code required to check airbag
component parts from those listed in table and
reproduce symptom.
Trouble codes Check parts Index. No.
11IRoll connector
IAirbag module (Driver)
IAirbag main harness
IAirbag control module



12IAirbag module (Passenger)
IAirbag main harness
IAirbag control module


15IAirbag module (Driver)
IRoll connector
IAirbag main harness
IAirbag control module



16IAirbag main harness
IAirbag module (Passenger)
IAirbag control module


21 Airbag control module
22 Airbag control module
25IFuse No. 6
IAirbag main harness
IAirbag control module
IBody harness



26 Side airbag module (LH) in front seat
31IAirbag main harness
IFront sub sensor and front sub sensor harness (RH)

32IAirbag main harness
IFront sub sensor and front sub sensor harness (LH)

41 Side airbag module (RH) in front seat
42 Side airbag module (LH) in front seat
45IAirbag control module
ISide airbag module (RH) in front seat

46IAirbag control module
ISide airbag module (LH) in front seat

51ISide airbag sensor (RH)
IAirbag control module

52ISide airbag sensor (LH)
IAirbag control module

53 Side airbag sensor (RH)
54 Side airbag sensor (LH)
55 Side airbag module in front seat
60
5-5[T5X0]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code