Subaru XT 1988 Service Manual page 348

FUEL INJECTION SYSTEM
2-7
ED
l
Check if fuel pump relay clicks every
NO
III
1.5 seconds.
!
YES
Check if voltage across terminal 55
(W) of control unit and body changes
YES
.1 Replace control unit.
J
from 0 - 10V alternately every
1.5 seconds.
~
NO
Disconnect fuel pump connector.
l
Check if voltage across terminal
(Ll
of connector (body side) and body
NO
.1
Repair harness from fuel pump to
J
changes from 0 - 1 OV alternately
I
relay.
every 1.5 seconds.
~
YES
Check if resistance between terminal
(W) of connector (body side) and
NO
-t
Repair harness.
I
terminal 55 (W) of control unit is
on.
l
YES
Replace fuel pump.
65