Service manual

3-52 FUEL SYSTEM (DFI)
Inlet Air Temperature S ensor (Service Code 13)
Inlet Air Temperature Sensor Resistance
Inspection
•
Remove the i nlet air temperature sensor (see Inlet Air
Temperature S ensor Removal/Installation).
•
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-
tions [C] located in almost the same depth with the sen-
sor.
NOTE
○
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 a digital meter, measure the internal resistance
of the sensor across the terminals at the temperatures
shown in the following.
Inlet Air Temperature Sensor Resistance
Standard: 5.4 ∼ 6.6 kΩ at 0°C ( 32 °F)
0.29 ∼ 0.39 kΩ a t 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 (see ECU Removal/Installation).
Inlet Air Temperature Sensor Circuit
1. ECU (Electronic Control Unit)
2. Inlet Air Temperature Sensor