Filter
Top Products
15-34 ELECTRICAL SYSTEM
Water Temperature Sensor Inspection
.Suspend the sensor in a container of coolant so that the
temperature sensing projection and threaded portion are
submerged.
.Using an ohmmeter, measure the internal resistance of
the sensor across the terminal and the body at the
temperatures shown in the table.
Fan Switch Resistance
0 Rising temperature:
From OFF to ON at 93-103° C
(199-217° F)
OFalling temperature:
From ON to OFF at 91 -95°C
(196 -203°F)
ON: Less than 0.5 Q
OFF: More than 1 M Q
Water Temperature Sensor
80°C (175°F): 47 -57 O
100°C (21TF): 25 -30 O
NOTE
0 The sensor and thermometer must not touch the
container sides or bottom.
1 .Fan Switch
1. Water Temperature Sensor
.Suspend the switch in a container of coolant so that the
temperature-sensing projection and threaded portion
are submerged.
.Suspend an accurate thermometer in the coolant.
2. Thermometer
*If the ohmmeter does not show the specified values,
replace the sensor.
NOTE
0 The switch and thermometer must not touch the
container sides or bottom.
.Place the container over a source of heat and gradually
raise the temperature of the coolant while stirring the
coolant gently.
Fan Switch Inspection
.Using an ohmmeter, check to see that only the
connections shown in the table have continuity (about
zero ohms).
* If the switch has an open or short, repair or replace it
with new one.