16-64 ELECTRICAL SYSTEM
Switches and Sensors
Water Temperature Sensor Inspection
Water Temperature Sensor (ECU) (see Water Temper-
ature Sensor (ECU) Removal in the Fuel System (DFI)
Water Temperature Sensor (Meter) (see Water Temper-
ature Sensor (Meter) Removal in the Cooling System
Suspend the sensor [A] in a container of coolant so that
the temperature-sensing portion [C] is submerged.
Suspend an accurate thermometer [B] with temperature
-sensing portion located in almost the same depth with
The sensor and thermometer must not touch the con-
tainer side or bottom.
Place the container over a source of heat and gradu-
ally raise the temperature of the coolant while stirring the
Using the digital meter, measure the internal resistance
of the sensor.
If the digital meter does not show the specified values,
replace the sensor.
Water Temperature Sensor (ECU) Resistance
Water Temperature Sensor (Meter) Resistance