Hyundai Tucson: Air Conditioning System / Ambient Sensor Repair procedures

Inspection
1.
Ignition "OFF"
2.
Disconnect ambient temperature sensor.
3.
Check the resistance of ambient temperature sensor between terminals 1 and 2 whether it is changed by changing of the ambient temperature.

1. Sensor Ground
2. Ambient Sensor Signal

Specification
Ambient temperature
[°C(°F)]
Resistance between terminals 1and 2 (kx)
-30(-22)
479.22
-20(-4)
271.45
-10(14)
158.32
0 (32)
95.10
10 (50)
58.76
20 (68)
37.30
30(86)
24.27
40(104)
16.17
50(122)
11.00

4.
If the measured resistance is not specification, substitute with a known-good ambient temperature sensor and check for proper operation.
5.
If the problem is corrected, replace the ambient temperature sensor.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Disconnect the connector and then remove the ambient temperature sensor (A).

3.
Install in the reverse order of removal.
Ambient Sensor Description and Operation
Description 1. The ambient temperature sensor is located at the front of the condenser and detects ambient air temperature. It is a negative type thermistor; resistance will increase with lowe ...

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