Engine Electrical System; Engine Oil Pressure Failure - Kubota u15-3 Workshop Manual

WSM U15-3
q. Engine electrical system

1. Engine oil pressure failure

1) Check engine oil pressure lamp.
Engine Condition
Before engine starts
After engine starts
Trouble case (1) :Engine oil pressure is low or oil switch fails.
Trouble case (2) :Wire harness is cut or oil switch fails.
2) Check oil amount and replenish if nessesary.
3) Pull the harness to see if the oil switch coupler is not
out of position. Be sure that the coupler harness is
tightly connected. (Pull by a 3 kg or less force.)
• If out of position, attach the coupler tightly and check
the meter reading again.
4) Check battery valtage at (+).
Terminal of wireharness coupler. If no battery voltage,
check the fuse and continuity of wireharness.
5) Check continuity of oil switch between switch terminal
and body earth.
Engine condition
Engine stop
Engine starts
Engine oil switch is NC (Normal close) type.
Lamp condition
Normal Trouble case (1)
ON
OFF
Continuity of oil switch
Yes
No
II-162
Trouble case (2)
ON OFF
ON OFF
(1)
(1) Engine oil pressure sensor (NC)