Kubota U20-3, Workshop Manual

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U20-3, U25-3 WSM Electrical system (Service section)
V -S-12
Trouble Check item Remedy Remarks
5. The charge lamp does
not go off.
(1) Check the 60A fuse for blowouts. Replace
(2) Check the alternator B terminal or coupler for
disconnection.
Repair or replace
(3) Check if the alternator is normal. Repair or replace Fig.25-1, 25-2
6. The oil lamp does not go
off.
(1) Check if the specified amount of oil is supplied. Refill
(2) Check the oil switch coupler for disconnection. Repair or replace
(3) Check if a voltage is applied to the oil switch coupler. Replace Fig.22, Fig.23
(4) Measure the pressure of the engine oil. Repair Fig.24
7. The water temperature
gauge does not function.
(1) Check the fuse (10A) for blowouts. Replace
(2) Check the water temperature gauge coupler for
disconnection.
Repair or replace
(3) Check the meter-side coupler for disconnection. Repair or replace
(4) Check if a voltage is applied to the water
temperature gauge coupler.
Repair Fig.26, 27
(5) Check if the water temperature sensor is normal. Repair Fig.28
8. The fuel remaining
amount alarm lamp does
not go on.
(1) Check if fuel is supplied.
(2) Check if the fuel sensor is normal.
Replace Fig.32
9. The fuel gauge does not
function.
(1) Check the fuse (10A) for blowouts. Replace
(2) Check the fuel sensor coupler for disconnection. Repair or replace Fig.29
(3) Check the meter-side coupler for disconnection. Repair or replace
(4) Check if a voltage is applied to the fuel sensor
coupler.
Replace Fig.30, Fig.31
(5) Check if the fuel sensor is normal. Replace Fig.32