Hyundai Sonata LF: Air Conditioning System / Ambient Temperature Sensor Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Heating, Ventilation and Air Conditioning / Air Conditioning System / Ambient Temperature Sensor Repair procedures

Inspection

Check the resistance of the ambient temperature sensor between terminals 1 and 2 whether it changes by changing the ambient temperature.

1. Ambient Sensor (+)

2. Sensor ground

Specification

Ambient temperature [°C (°F)]	Resistance between terminal 1 and 2 (k?)
-40 (-40)	881.03
-30 (-22)	480.41
-20 (-4)	271.21
-10 (14)	158.18
0 (32)	95.096
10 (50)	58.799
20 (68)	37.315
30 (86)	24.260
40 (104)	16.130
50 (122)	10.950
60 (140)	7.579
70 (158)	5.341
80 (176)	3.828

Diagnosis With GDS

The heating, ventilation and air conditioning can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).

? The diagnostic system (GDS) provides the following information.

(1) Self diagnosis: Checking the failure code (DTC) and display.

(2) Current data: Checking the system input/output data state.

(3) Actuation test: Checking the system operation condition.

(4) Additional function: Other controlling such as he system option and zero point adjustment.

2.	Select the 'Car model' and the system to be checked in order to check the vehicle with the tester.

3.	Select the 'Current data' menu to search the current state of the input/output data. The input/output data for the sensors corresponding to the Ambient Temperature Sensor can be checked.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the front bumper. (Refer to Body - "Front Bumper Cover")

3.	Disconnect the connector (A) and then remove the ambient temperature sensor (B).

4.	Install in the reverse order of removal.

Ambient Temperature Sensor Description and Operation

Description 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 lower temperature, and decrease with higher temperature...

Heater

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Occupant Classification Sensor (OCS) Description and Operation

Description In order to make normal activation of airbag system, SRSCM detects DTC(s) for the Occupant Classification System (OCS). If the seat is occupied, OCS detects passenger presences status and send signal to SRSCM via CAN. SRSCM recognizes the signal as 2(two) different classifications; that is, 1(Empty or small occupant with child restraint system), 2(Occupied with large occupant and small occupant)...

Hyundai Sonata LF 2014-2019 Service Manual: Power Mosfet Repair procedures