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FUEL SYSTEM (DFI) 3-49
Inlet Air Temperature Sensor (Service Code 13)
Sensor Resistance Inspection
•
Remove the inlet air temperature sensor (see this sec-
tion).
•
Suspend the sensor [A] in a container of machine oil so
that the heat-sensitive portion is submerged.
•
Suspend a thermometer [B] with the heat-sensitive por-
tion [C] located in almost the same depth with the sensor.
NOTE
○
The sensor and thermometer must not touch the con-
taine
r side or bottom.
•
Place t he container over a source of heat and gradually
raise the temperature of the oil while stirring the oil gently
for even temperature.
•
Using a digital meter, measure the internal resistance
of the sensor across the terminals at the temperatures
shown in the table.
Inlet A ir Temperature Sensor Resistance
Standard: 1.6 ∼ 3.7 kΩ at 20°C (68°F)
0.24 ∼ 0.43 kΩ at 80°C (176°F)
If the measurement is out of the range, replace the sensor.
If the measurement is within the specified, replace the
ECU.
A. ECU
F. Inlet Air Temperature Sensor