Subaru XT 1988 Service Manual page 1322

6-3
WIRING DIAGRAM AND TROUBLESHOOTING
4) Oil Pressure Gauge
Pointer will not lower.
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Pointer will not rise.
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Inaccurate indication.
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Check with ignition
switch
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off.
~
Oil pressure gauge is defec-
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Check with ignition switch
tive. on.
~
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Replace.
NOI
Oil pressure gauge operates.
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Replace fuse.
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Fuse is blown.
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Yes
See if fuse is blown.
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No
Yes
Remove oil pressure unit termi-
Replace oil See if 12V is in RY lead Check if 12V
nal. Connect resistor (1400) to
Yes
appear at
oil pressure gauge lead terminal
pressure
-
of
21-P connector
of
~
#27 terminal of 21-P can-
~
nector (brown).
on engine harness side and to
gauge.
meter.
ground, to see if gauge points to
t
Yes
392 kPa (4 kg/cml, 57 psi).
Yes
Ignition
(+)
power circuit Defective harness between
of instrument panel is oil pressure gauge and oil
Oil pressure unit is defective.
improperly conditioned.
pressure unit.
~
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Replace.
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Repair harness. Repair harness.
Oil pressure gauge is de-
l-
fective.
Replace.
50