Kia Carnival (2009+). Manual — part 250

2009 > G 2.7 DOHC >

INSPECTION

FUNCTION AND OPERATION PRICIPLE

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 a malfunction has occurred.

SPECIFICATION

Pedal Position

Output Voltage (V) [Vref = 5.0V]

APS1

APS2

C.T

0.7 ~ 0.8V

0.29 ~ 0.46V

W.O.T

3.85 ~ 4.35V

1.93 ~ 2.18V

Item

Sensor Resistance

APS1

0.7 ~ 1.3k! at 20°C (68°F)

APS2

1.4 ~ 2.6k! at 20°C (68°F)

CIRCUIT DIAGRAM

COMPONENT INSPECTION

1. Connect a scantool on Diagnoisis Link Connector (DLC).

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

Specification

Condition

Output Voltage (V)

APS1

APS2

C.T

0.70 ~ 0.80

0.29 ~ 0.46

W.O.T

3.85 ~ 4.35

1.93 ~ 2.18

3. Turn ignition switch OFF and disconnect the scantool from the DLC.

4. Disconnect APS connector and measure resistance between APS terminals 5(6) and 4(5) (APS 1).

Specification: Refer to SPECIFICATION.

5. Disconnect APS connector and measure resistance between APS terminals 6(3) and 2(4) (APS 2).

Specification: Refer to SPECIFICATION.

Fuel System

Engine Control System - Heated Oxygen

Sensor (HO2S)

Fuel System