1999 SUBARU FORESTER light

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

3) Conduct appearance inspection on parts
selected.
NOTE:
Also check connector terminals, wiring harness,
case, etc. for damage.
:Is there anything unusual about the
appearance of airbag component
parts?
: Replace faulty airbag component parts.
: Go to step5X2.
5X2 : AIRBAG COMPONENT PARTS
VIBRATION INSPECTION
1) Gently shake check parts (to determine faults.).
2) To check airbag module or roll connector, turn
and tilt steering wheel.
CAUTION:
Do not shake or vibrate airbag control module.
:Does the component malfunction
again when shaking?
: Replace faulty airbag component parts.
: Go to step5X3.
5X3 : SHOWERING INSPECTION TO BODY
Spray water on vehicle body.
CAUTION:
Do not directly spray water on airbag compo-
nents.
NOTE:
Also check wiring harnesses as water may leak
along them and get airbag component parts wet.
G5M0461
:Does water leak into the passenger
compartment when showering
vehicle?
: Replace faulty airbag component parts.
: Perform clear memory. [T4C0].>
Y: WARNING LIGHT INDICATES
TROUBLE CODE, THEN NORMAL
CODE. (FLASHING NORMAL CODE.)
DIAGNOSIS:
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.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable, and then wait at least 20
seconds.
5Y1 : AIRBAG CONNECTOR APPEARANCE
INSPECTION
Conduct appearance inspection on airbag connec-
tors (AB1) through (AB28).
NOTE:
Check terminals, case and wiring harnesses for
damage.
:Is there anything unusual about the
appearance of connectors (AB1)
through (AB28)?
: Replace faulty airbag component parts.
: Go to step5Y2.
5Y2 : AIRBAG CONNECTOR VIBRATION
INSPECTION
Conduct vibration inspection on airbag connectors
(AB1) through (AB28).
NOTE:
Gently shake each airbag connector.
:Do the connectors (AB1) through
(AB28) malfunction again when shak-
ing?
: Replace faulty airbag component parts.
: Go to step5Y3.
61
[T5Y2]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5Y7 : WARNING LIGHT ILLUMINATION
CHECK
Turn ignition switch ªONº (engine off) and observe
airbag warning light.
:Does the airbag warning light come
on for about 7 seconds, then go out
and stay out?
: Perform clear memory. [T4C0].>
: Go to ªDIAGNOSTICS PROCEDUREº.

63
[T5Y7]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

3. Cruise Control System
A: PRECAUTION
1. SUPPLEMENTAL RESTRAINT SYSTEM
ªAIRBAGº
Airbag system wiring harness is routed near the
cruise control module and cruise control command
switch.
CAUTION:
IAll airbag system wiring harness and con-
nectors are yellow. Do not use electrical test
equipment on these circuits.
IBe careful not to damage airbag system wir-
ing harness when servicing the cruise control
module and cruise control command switch.
B: PRE-INSPECTION
1. FUNCTION TESTS
Conduct road tests by selecting a smooth, flat road
or use free rollers for road test simulation.
ICruise Control Main Switch
1) Turn ignition switch to ON.
2) Check that cruise control main switch indicator
light comes on when main switch is pressed (ON).
3) Check that main switch indicator light goes out
when main switch is pressed again (OFF).
4) Turn ignition switch to OFF with main switch ON
(indicated by illumination). Turn ignition switch ON
again to ensure that main switch indicator light
remains OFF.
ICruise Control Command Switch
1) Check that cruise control command switch is
properly set in ªSET/COASTº, ªRESUME/ACCELº,
or ªCANCELº mode.
2) Also check that command switch returns to the
original position when released.
IConstant Speed Test
1) Turn cruise control main switch to ON.
2) Drive the vehicle at a speed greater than 40
km/h (25 MPH).
3) Press command switch to set in ªSET/COASTº
mode.
4) Ensure that vehicle is maintained at the speed
set when command switch was pressed.
IAcceleration Test
1) Set vehicle speed at a speed greater that 40
km/h (25 MPH).
2) Ensure that vehicle continues to accelerate
while holding command switch in ªRESUME/
ACCELº mode, and that vehicle maintains that
optional speed when command switch is released.
IDeceleration Test
1) Set vehicle speed at an optional speed greater
than 40 km/h (25 MPH).
2) Ensure that vehicle continues to decelerate
while holding command switch in ªSET/COASTº
mode, and that it maintains that optional speed
when command switch is released.
NOTE:
When vehicle speed reaches the lower speed limit
of 30 km/h (19 MPH) during deceleration, cruise
control will be released.
2. CRUISE CONTROL CABLE
3B21 : CHECK CRUISE CONTROL CABLE.
Check accelerator cable (A) and cruise control
cable (B) installation.
S6M0099B
:Is the cruise control cable securely
installed to the left of the accelerator
cable?
: Go to step3B22.
: Install cruise control cable securely. Go
to step3B22.
13
[T3B2]6-2DIAGNOSTICS
3. Cruise Control System

E: CONTROL MODULE I/O SIGNAL
G6M0015
Content Terminal No. Measuring conditions and I/O signals (ignition switch ON and engine idling)
Vent valve 1IPower supply is ON when vehicle is stopped.
ION-and-OFF (ª0º-and-battery voltage) operation is alternately repeated while
cruise control is operating.
Safety valve 2IPower supply is ON when vehicle is stopped.
ION-and-OFF (ª0º-and-battery voltage) operation is alternately repeated while
cruise control is operating.
Ignition switch 3IBattery voltage is present when ignition switch is turned ON.
Iª0º volt is present when ignition switch is turned OFF.
Cruise control main switch 4IBattery voltage is present when main power is turned ON.
Iª0º volt is present when main power is turned OFF.
Power supply to vacuum valve,
vent valve, safety valve and
indicator light5IBattery voltage is present when main power is turned ON.
Iª0º volt is present when main power is turned OFF.
SET/COAST switch 6IBattery voltage is present when command switch is turned to SET/COAST
position.
Iª0º volt is present when command switch is released.
RESUME/ACCEL switch 7IBattery voltage is present when command switch is turned to RESUME/
ACCEL position.
Iª0º volt is present when command switch is released.
Brake switch 8 Set select lever to any position other than ªPº or ªNº position (AT) / leave
clutch pedal released (MT), while cruise control main switch is turned ON.
Then check that;
IBattery voltage is present when brake pedal is released.
Iª0º volt is present when brake pedal is depressed, or
IBattery voltage is present when clutch pedal is released (MT).
Iª0º volt is present when clutch pedal is depressed (MT).
IBattery voltage is present when select lever is in any position other than ªPº
or ªNº position (AT).
Iª0º volt is present when select lever is set to ªPº or ªNº position (AT).
Clutch switch (MT)/
Inhibitor switch (AT)9IBattery voltage is present when clutch pedal is released (MT).
Iª0º volt is present when clutch pedal is depressed (MT).
IBattery voltage is present when select lever is in any position other than ªPº
or ªNº position (AT).
Iª0º volt is present when select lever is set to ªPº or ªNº position (AT).
Vacuum valve 11IPower supply is ON when vehicle is stopped.
ION-and-OFF (ª0º-and-battery voltage) operation is alternately repeated while
cruise control is operating.
Set signal to transmission con-
trol module (AT)12ITCM emits a ground-level signal while driving vehicle at least 40 km/h (25
MPH) with SET switch ON.
Ground 13 Ð
Check connector/
OBD-II service connector14 Ð
Check connector/
OBD-II service connector15 Ð
20
6-2[T3E0]DIAGNOSTICS
3. Cruise Control System