Subaru 1600 Service Manual page 119

ENGINE
1. Lubrication System
Before troubleshooting, make sure that the engine oil level is correct and no oil leakage exists.
~rouble
Possible cause
Corrective action
I) Oil pressure
,
Cracked diaphragm Replace.
switch failure
-~---~- ~---~ "~--~-
Oil leakage within switch
Replace.
~"~
Clogged oil filter
Replace.
Malfunction of oil by-pass valve
Clean or replace.
~~ ~-
Malfunction of oil relief valve
Clean or replace.
2) Low oil
,.....---
I. Warning light
pressure Clogged oil passage Clean.
remains on.
Excessive tip clearance and side clearance
Replace.
of oil pump rotor and gear
"~--"~
Clogged oil strainer or broken pipe
Clean or replace.
r----~---
-----~--~~ ~--- ----~-.--~--------
Insufficient engine oil Replenish.
---~- ~--"~----
r--~--"
----
3) No oil pressure Broken pipe of oil strainer
Replace.
- -
Stuck oil pump drive gear and rotor
Replace_
c--~
-~-.-
--- -"--"----
1) Burnt-out bulb
Replace.
2.
Warning light
r - - - - -
~----.~-~---~--
does not go
2) Poor contact of switch contact points
Replace.
on.
-------
----~----------~- ~-~-~~~----
3) Disconnection of wiring
Repair.
1) Poor contact at terminals
Repair.
3. Warning light
flickers
2) Defective wiring harness
Repair.
momentarily.
Check for the same
3) Low oil pressure
possible causes as listed in 1.-2.