Yanmar EF-494T - Checkpoints of electrical equipment; Water temperature sensor; Oil pressure switch

10 ELECTRIC EQUIPMENT 10 ELECTRIC EQUIPMENT
EF494T TM 06/2011 edition
218
10.3.3 Checkpoints of electrical equipment
3. Water temperature sensor
Coolant temperature: 124250-49351
Table of sensor characteristics
* Values in parentheses are references.
4. Oil pressure switch
Oil pressure switch 0.5 KG plug: 114250-39450
Single item check
As for DCA, pay attention to prevent wrong connection of the tester.
*Oil pressure setting : 0.5  0.1 kgf/cm
2
Range
Measuring point
Result
Tester probe
+
Tester probe

Ω
[1]
Chassis
grounding
Resistance alters
depending on the coolant
temperature.
DCV
[2]
Chassis
grounding
Approx. 5.0 V DC when
the key switch is turned
on.
Temperature
(C)
Resistance (Ω)
Temperature
(C)
Resistance (Ω)
(35)
(670)
(105)
(54.5)
(50)
(350)
115
42  2.5
80
118  6
(120)
(36.2)
100
(63.5)
(140)
(22)
Range
Measuring point
Result
Tester probe
+
Tester probe

Continuity
[1]
Chassis
grounding
Continued while the engine
is stopped. Discontinued
while the engine is running.
DCV
[2]
Chassis
grounding
12 V DC when the starter
switch is turned on. As for
DCA, the oil lamp is lit up at
approx. 0.08 A.