Hyundai Palisade (LX2): Engine Control System / Accelerator Position Sensor (APS)

Hyundai Palisade (LX2) 2020-2026 Service Manual / Engine Control/Fuel System / Engine Control System / Accelerator Position Sensor (APS)

Description and operation

Description

Installed on the accelerator pedal module, the Accelerator Position Sensor (APS) detects the rotation angle of the accelerator pedal. The APS is one of the most important sensors in engine control system. Therefore, each of the two sensors comprising the APS has individual power and ground line. The second sensor monitors the first and its output voltage is half 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.

Hyundai Palisade. Description and operation

Specifications

Specification

Accelerator Position	Output Voltage (V) [Vref = 5V]
Accelerator Position	APS1	APS2
C.T	0.7 - 0.8	0.33 - 0.43
W.O.T	3.85 - 4.35	1.93 - 2.18

Hyundai Palisade. Specifications

Schematic diagrams

Circuit Diagram

Hyundai Palisade. Schematic diagrams

Harness Connector

Hyundai Palisade. Schematic diagrams

Repair procedures

Inspection

1.	Connect the diagnostic tool on the Data Link Connector (DLC).

2.	Switch "ON" the ignition.

Measure the output voltage of the APS 1 and 2 at C.T and W.O.T.

Accelerator Position	Output Voltage (V) [Vref = 5V]
Accelerator Position	APS1	APS2
C.T	0.7 - 0.8	0.33 - 0.43
W.O.T	3.85 - 4.35	1.93 - 2.18

Removal

1.	Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.	Disconnect the accelerator position sensor connector (A).

Remove the accelerator position sensor (B) after loosening the mounting bolts.

Accelerator pedal sensor mounting bolt :

8.8 - 13.7 N.m (0.9 - 1.4 kgf.m, 6.5 - 10.1 lb-ft)

Hyundai Palisade. Repair procedures

Installation

1.	Install in the reverse order of removal.

❮Oil Pressure Sensor (OPS)

Description and operation Description Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine speed and load.

Injector❯

Description and operation Description Based on information from various sensors, the ECM can calculate the fuel amount to be injected.

Other information:

Hyundai Palisade (LX2) 2020-2026 Service Manual: A/C Pressure Transducer

Description and operation Description The A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls the cooling fan by operating it high speed or low speed.

Hyundai Palisade (LX2) 2020-2026 Service Manual: Repair procedures

Inspection 1. Turn the ignition switch ON. 2. Manually operate the control switch and measure the voltage of the blower motor. 3. Select the control switch to raise the voltage until it reaches high speed.