FUNCTION
AND OPERATION PRINCIPLE
Intake Air Temperature
Sensor (IATS) is installed inside the Mass Air Flow Sensor (MAFS) and
detects the intake air temperature. To calculate precise air quantity,
correction of the air temperature is needed because air density varies
according to the temperature. So the PCM uses not only MAFS signal but
also IATS signal. This sensor has a Negative Temperature Coefficient (NTC)
and its resistance is in inverse proportion to the
temperature.
SPECIFICATION
Temperature
|
Resistance
(kΩ)
|
°C
|
°F
|
-40
|
-40
|
100.87
|
-20
|
-4
|
28.58
|
0
|
32
|
9.40
|
10
|
50
|
5.66
|
20
|
68
|
3.51
|
40
|
104
|
1.47
|
60
|
140
|
0.67
|
80
|
176
|
0.33
|
SCHEMATIC
DIAGRAM
COMPONENT
INSPECTION
| 1. |
Turn ignition switch
OFF. |
| 2. |
Disconnect IATS
connector. |
| 3. |
Measure resistance between IATS terminals 4
and 5. |
| 4. |
Check that the resistance is within the
specification.
Specification: Refer to
SPECIFICATION.
| |
