Subaru Legacy 2005 Service Manual page 3698

SEAT BELT SYSTEM
4. Seat Belt Warning System
A: WIRING DIAGRAM
1. LHD MODEL
<Ref. to WI-240, LHD MODEL, WIRING DIAGRAM, Seat Belt Warning System.>
2. RHD MODEL
<Ref. to WI-241, RHD MODEL, WIRING DIAGRAM, Seat Belt Warning System.>
B: INSPECTION
TROUBLE SYMPTOM:
• Seat belt warning light does not come on or go off.
• Warning buzzer does not beep.
1. DRIVER'S SEAT
Step
1 CHECK BODY INTEGRATED MODULE.
Check DTC of body integrated module using
Subaru Select Monitor. <Ref. to LAN(diag)-14,
OPERATION, Subaru Select Monitor.>
2 CHECK VEHICLE SPEED SIGNAL.
Check DTC of ABS or vehicle dynamics control
(VDC) using Subaru Select Monitor. <Ref. to
ABS(diag)-15, OPERATION, Subaru Select
Monitor.> or <Ref. to VDC(diag)-16, OPERA-
TION, Subaru Select Monitor.>
3 CHECK BODY INTEGRATED MODULE.
1) Connect the Subaru Select Monitor to data
link connector.
2) Turn the ignition switch to ON (engine
OFF).
3) Turn the Subaru Select Monitor power
switch to ON.
4) Read the data of "Driver's Seat SW input"
using Subaru Select Monitor. <Ref. to
LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
4 CHECK SEAT BELT WARNING LIGHT.
Read the data of "D-belt warning light O/P"
using Subaru Select Monitor. <Ref. to
LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
5 CHECK BODY INTEGRATED MODULE.
1) Insert the tongue plate to driver's seat belt
buckle.
2) Read the data of "Driver's Seat SW input"
using Subaru Select Monitor. <Ref. to
LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
6 CHECK SEAT BELT WARNING LIGHT.
Read the data of "D-belt warning light O/P"
using Subaru Select Monitor. <Ref. to
LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
Seat Belt Warning System
Is DTC displayed?
Is DTC displayed?
Is the data of "Driver's Seat
SW input" "OFF"?
Is the data of "D-belt warning
light O/P" "ON"? Or does the
seat belt warning light on com-
bination meter illuminate?
Is the data of "Driver's Seat
SW input" "ON"?
Is the data of "D-belt warning
light O/P" "OFF"? Or is the seat
belt warning light on combina-
tion meter off?
SB-10
Check
Perform the diag-
nosis according to
DTC.
Perform the diag-
nosis according to
DTC.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Yes No
Go to step 2.
Go to step 3.
Check the harness
between body inte-
grated module and
chassis ground.
Check the harness
between ignition
switch and body
integrated module.
Check the body
integrated module.
Check the harness
between ignition
switch and body
integrated module.