Coolant Temperature Switch - Kubota GR1600EU Workshop Manual

GR1600EU, WSM

(12) Coolant Temperature Switch

Engine Oil Pressure Switch
1. Measure the resistance with an ohmmeter across the switch
terminal and the chassis.
2. If 0 ohm is not indicated in the normal state, the switch is faulty.
3. If infinity is not indicated at pressure over 50 kPa (0.5 kgf/cm
7 psi), the switch is faulty.
In normal state
Resistance (Switch
At pressure over approx.
terminal – Chassis)
50 kPa (0.5 kgf/cm
(1) Engine Oil Pressure Switch
Coolant Temperature Switch
1) Connector Voltage
1. Disconnect the 1P connector from the coolant temperature
switch (1).
2. Turn the main switch key to the "ON" position, and measure the
voltage with a voltmeter between the connector terminal and the
chassis.
3. If a certain voltage is not indicated, the wiring harness is faulty.
Voltage (Connector
Factory specification
terminal – Chassis)
2) Coolant Temperature Switch Continuity
1. Disconnect the 1P connector, and remove the thermo switch.
2. Using an ohmmeter, check for continuity between the switch
terminal and the chassis. The figure shows the operation
hysteresis.
3. If infinity is indicated at temperature over factory specifications,
the switch is faulty.
Working temperature Factory specification
(1) Coolant Temperature Switch
6-S18
ELECTRICAL SYSTEM
0 Ω
Infinity
2
, 7 psi)
9Y1210595ELS0033US0
A certain voltage is
indicated
120 to 126 °C
248 to 258 °F
(A) ON
(B) OFF
(C) 120 to 126 °C (248 to 258 °F)
(D) 116 °C (240 °F) or more
9Y1210595ELS0034US0
KiSC issued 11, 2013 A
2
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