Subaru LEGACY 2004 Service Manual page 258

SEAT BELT SYSTEM
Step
2 CHECK VEHICLE SPEED SIGNAL.
Check DTC of ABS or VDC using Subaru
Select Monitor. <Ref. to ABS(diag)-15, OPER-
ATION, Subaru Select Monitor.> <Ref. to
VDC(diag)-16, OPERATION, Subaru Select
Monitor.>
3 CHECK BODY INTEGRATED UNIT.
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 switch to
ON.
4) Read the data of "P seatbelt 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 "P-belt warning light O/P"
using Subaru Select Monitor. <Ref. to
LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
5 CHECK BODY INTEGRATED UNIT.
1) Insert the tang plate into the passenger's
seat belt buckle.
2) Read the data of "P seatbelt 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 "P-belt warning light O/P"
using Subaru Select Monitor. <Ref. to
LAN(diag)-14, OPERATION, Subaru Select
Monitor.>
7 CHECK VEHICLE MODEL.
8 CHECK SEAT BELT WARNING SYSTEM.
1) Hold the tang plate disconnected from seat
belt buckle.
2) Turn the ignition switch to ON.
Seat Belt Warning System
Is DTC displayed?
Is the data of "P seatbelt SW
input" "OFF"?
Is the data of "P-belt warning
light O/P" "ON"?
Or does the passenger's seat
belt warning light illuminate?
Is the data of "P seatbelt SW
input" "ON"?
Is the data of "P-belt warning
light O/P" "OFF"?
Or is the passenger's seat belt
warning light off?
Is the vehicle EC, EK or KA
model?
Does the seat belt warning
light illuminate?
SB-10
Check
Perform the diag-
nosis according to
DTC.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 9.
Yes No
Go to step 3.
Check the harness
between body inte-
grated unit and
chassis ground.
Check the harness
between ignition
switch and body
integrated unit.
Check the body
integrated unit.
Check the harness
between ignition
switch and body
integrated unit.
The seat belt
warning system is
normal at this time.
A temporary poor
contact of har-
ness connector
may be the cause.
Check the poor
contact.
Replace the body
integrated unit.