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

Repair procedures
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
|

|
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)
|

|
1. |
Install in the reverse order of removal.
|
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The ignition switch must be in the ON position for fan operation.
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