Hyundai Sonata LF: Air Conditioning System / Ambient Temperature Sensor Description and Operation

Hyundai Sonata LF 2014-2019 Service Manual / Heating, Ventilation and Air Conditioning / Air Conditioning System / 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.

The sensor output will be used for discharge temperature control, temperature regulation door control, blower motor level control, mix mode control and in-car humidity control.

If the ambient temperature is below 1.0°C (33.8°F), the A/C compressor will stop.

The compressor will operate manually.

Photo Sensor Repair procedures

Inspection 1. Turn the ignition switch ON. 2. Connect the GDS. 3. Emit intensive light toward the photo sensor using a lamp, and check the output voltage change...

Ambient Temperature Sensor Repair procedures

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

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Fuel Pump Control Module (FPCM) Description and Operation

Description The fuel pump control module (FPCM) is installed on the right side of the fuel tank on the fuel pump top plate and controls the DC motor mounted inside the low pressure fuel pump. The module compares instantaneous fuel pressure information measured by the fuel pressure sensor (FPS) with target fuel pressure information provided by the ECM and generates the desired target fuel pressure by controlling the fuel pump motor and regulating fuel flow rate in the low pressure fuel line between the low and high pressure fuel pumps...

Hyundai Sonata LF 2014-2019 Service Manual: Photo Sensor Repair procedures