Subaru XT 1988 Service Manual page 1357

WIRING DIAGRAM AND TROUBLESHOOTING 6-3
Door switch is closed.
Check if door switch terminals switch
No i
Door switch is faulty.
I
properly when door is opened and closed.
Yes
Check if door switch terminals of body
No
i
Wiring is broken.
I
connector (on control unit side) switch
properly and continuity exists between
respective terminals and ground terminal
when door is opened and closed.
Yes
: Control unit is faulty. (See below.)
J
Control unit is faulty.
Disconnect and then reconnect battery
cables.
Check if shoulder belt anchor moves over its
No
: Control unit is faulty.
J
entire stroke when door is opened and
closed 5 to 6 times with ignition switch ON.
Yes
Check if shoulder belt anchor moves
No
-[ Control unit is faulty.
J
properly when tested in accordance with
Inspection Chart 1.
Yes
Control unit is O.K.
85