Subaru XT 1988 Service Manual page 1373

WIRING DIAGRAM AND TROUBLESHOOTING 6-3
E
FAIL LAMP DOES NOT COME ON
Turn ignition switch OFF.
I Yes
Check if fuse is blown.
: Check cause and replace fuse.
I
No
Disconnect terminals BR and GY of check
connector.
Turn ignition switch ON.
No
Check if fail lamp comes on.
Disconnect signal controller connector.
Ground terminal YB of body harness
Yes
connector
@
of signal controller.
Yes
I
Connect signal I Check if fail lamp comes on.
controller connector.
No
No
Start engine.
Check if fail lamp power circuit operates
f---
properly.
Yes
Replace fail lamp bulb.
I
Repair connections or
harness.
No
Check if 12 volts are produced across
Repair connections or harness.
terminals RL and B of signal controller body
harness connectors
®
and
®.
Yes
No
No
Check if 12 volts are produced at terminal
Check if continuity exists between terminal
f---
Br of signal controller harness connector Br of MPF I control unit harness connector
@.
®
and terminal Br of signal controller
@.
Yes Yes
Replace signal controller. Check if MPFI control
Repair connections or
operates properly.
harness.
101