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 Owners Manual: Parking
Always come to a complete stop and continue to depress the brake pedal. Move
the shift lever into the P (Park) position, apply the parking brake, and place the
ignition switch in the LOCK/OFF position. Take the Key with you when exiting the
vehicle.
WARNING
When you stay in the vehicle with the e ...
Hyundai Sonata LF 2014-2019 Owners Manual: Operating condition
1. Place the light switch in the AUTO position.
2. Turn on the high beam by pushing the lever away from you.
The smart high beam () indicator
will illuminate.
3. The Smart High Beam will turn on when vehicle speed is above 28 mph (45km/h).
If the lever is pushed away when the Smart High Beam is o ...