Hyundai Genesis: 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 to 2 is out of the range (approximately 1/2), the
diagnostic system judges that it is abnormal.

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the OPS connector.
3.
Remove the OPS (Refer to "Removal").
4.
After immersing the thermistor of the sensor into engine coolant ...
Specification
AcceleratorPositionOutput Voltage (V)APS1APS2C.T0.7 ~ 0.80.33 ~ 0.43W.O.T3.85 ~ 4.351.93 ~ 2.18
...
Other information:
Basic Troubleshooting
Basic Troubleshooting Guide
Customer Problem Analysis Sheet
Basic Inspection Procedure
Measuring Condition of Electronic Parts' Resistance
The resistance measured at high temperature after running the
vehicle may be high or low. So all resistance must be measured at
...
Replacement
•
Put on gloves to protect your hands.
•
When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components.
•
When removing the interior trim pieces, use a pla ...