Hyundai Sonata: Engine Control System / Accelerator Position Sensor (APS) Description and Operation
Accelerator Position Sensor (APS) is installed on the
accelerator pedal module and detects the rotation angle of the
accelerator pedal. The APS is one of the most important sensors in
engine control system, so it consists of the two sensors which adapt
individual sensor power and ground line. The second sensor monitors the
first sensor and its output voltage is half of the first one. If the
ratio of the sensor 1 and 2 is out of the range (approximately 1/2), the
diagnostic system judges that it is abnormal.

Inspection
1.
Connect the GDS on the Data Link Connector (DLC).
2.
Measure the output voltage of the RPS at idle and various engine speed.
ConditionOutput Voltage (V)Idle Approx. 1.21, ...
Specification
AcceleratorPositionOutput Voltage (V)APS1APS2C.T0.7 ~ 0.80.29 ~ 0.46W.O.T3.85 ~ 4.351.93 ~ 2.18
...
Other information:
Hyundai Sonata LF 2014-2019 Service Manual: Blower Unit Components and Components Location
Component Location
1. Blower unit assembly
Components
1. Intake actuator2. Intake case [LH]3. Intake door assembly4. Air filter5. Filter cover assembly6. Intake inlet seal 7. Intake case [RH]8. Intake outlet seal 9. Blower upper cover10. Blower unit pad11. Blower lower case12. Resistor13 ...
Hyundai Sonata LF 2014-2019 Owners Manual: Gauges
Speedometer
The speedometer indicates the speed of the vehicle and is calibrated in miles
per hour (mph) and/or kilometers per hour (km/h).
Tachometer
The tachometer indicates the approximate number of engine revolutions per minute
(rpm).
Use the tachometer to select the correct shift points and ...