Subaru XT 1988 Service Manual page 1330

6-3
WIRING DIAGRAM AND TROUBLESHOOTING
1) All Functions do not Operate (No LED's Glow)
Check if wiring is connected to
Yes
Faulty control & display unit or
+BAT and +IGN terminals. related circuit.
No
Faulty body harness (including
fuses).
2) Display (LCD) does not Glow or is Erroneous
Check if control & display unit
Yes
Faulty control & display or
-
is connected to circuit unit. circuit unit.
No
Connect harness properly.
3) Clock/Time Alarm Unit does not Operate
Circuit unit is faulty.
4) Tripmeter/Average Car Speed Unit does not Operate
I
I
Yes
Yes
I
Check if speedometer operates.
Check if car speed signals are
I
F l ' . .
I
I
emitted from combination meter.
I
au ty Circuit Unit.
No
No
I
Faulty meter.
I
Faulty meter.
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