Hyundai Sonata: Engine Control System / Accelerator Position Sensor (APS) Description and Operation

Hyundai Sonata LF 2014-2019 Service Manual / Engine Control / Fuel System / Engine Control System / Accelerator Position Sensor (APS) Description and Operation

Description
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.

Rail Pressure Sensor (RPS) Repair procedures
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, ...

Accelerator Position Sensor (APS) Specifications
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: Thermostat Repair procedures
Removal     Disassembly of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. 1. Drain engine coolant so that its level would be under the thermostat height. 2. Remove the radiator lower hose. (Refer to Cooling System - "Radiator Hose ...

Hyundai Sonata LF 2014-2019 Owners Manual: Immobilizer Indicator Light (With Smart Key)
This indicator light illuminates for up to 30 seconds: When the vehicle detects the smart key in the vehicle properly while the ignition switch or the Engine Start/ Stop button is ACC or ON. - At this time, you can start the engine. - The indicator light goes off after starting the engine. This in ...

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