Water Temperature Sensor (Service Code 14)
Water Temperature Sensor Inspection
Remove the water temperature sensor (see Water Tem-
perature Sensor Removal/Installation).
Suspend the sensor [A] in a container of machine oil so
that the heat-sensitive portion and threaded portion are
Suspend an accurate thermometer [B] with heat-sensitive
portions [C] located in almost the same depth.
The sensor and thermometer must not touch the con-
tainer side or bottom.
Place the container over a source of heat and gradually
raise the temperature of the oil while stirring the oil gently
for even temperature.
Using the hand tester, measure the internal resistance of
If the measurement is out of the range, replace the sensor.
Water Temperature Sensor Resistance
*: Reference Information
If the reading is within the standard, but the problem still
exists, replace the ECU (see ECU Removal/Installation).
Water Temperature Sensor Circuit
2. Water Temperature Sensor
FUEL SYSTEM (DFI) 3-51