Kia Rio: Engine Control System / Accelerator Position Sensor (APS)

Kia Rio 2017-2021 YB Service Manual / Engine Control / Fuel System / Engine Control System / Accelerator Position Sensor (APS)

Specifications
Specification

Accelerator
Position
Output Voltage (V) [Vref = 5V]
APS1
APS2
C.T
0.7 - 0.8
0.32 - 0.42
W.O.T
3.98 - 4.22
1.93 - 2.17

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.

Schematic diagrams
Circuit Diagram

Repair procedures
Inspection
1.

Connect the KDS/GDS on the Diagnosis Link Connector (DLC).

2.

Start engine and check output voltages of APS 1 and 2 at C.T and W.O.T.

Accelerator
Position
Output Voltage (V) [Vref = 5V]
APS1
APS2
C.T
0.7 - 0.8
0.32 - 0.42
W.O.T
3.98 - 4.22
1.93 - 2.17

Removal
1.

Turn the ignition switch OFF and disconnect the battery negative (-) terminal.

2.

Disconnect the accelerator position sensor connector (A).

3.

Remove the installation nuts (B) and then remove the accelerator pedal module.

Accelerator pedal module mounting nut:

12.7 - 15.7 N·m (1.3 - 1.6 kgf·m, 9.4 - 11.6 lb·ft)

Installation
1.

Install in the reverse order of removal.

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