Hyundai Elantra (CN7): Engine Control System / Accelerator Position Sensor (APS)

Hyundai Elantra (CN7) 2021-2026 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.

Specifications

Specification

Accelerator Position	Output Voltage [V]
Accelerator Position	APS1	APS2
C.T	0.7 - 0.8	0.33 - 0.43
W.O.T	3.98 - 4.22	1.93 - 2.17

Schematic diagrams

Circuit Diagram

Harness Connector

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 3 and 6 at C.T and W.O.T.

Specification : Refer to "Specification"

Removal

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

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

3.	Remove the accelerator pedal module after loosening the nut (A).

Installation

1.	Install in the reverse order of removal.

❮Heated Oxygen Sensor (HO2S)

Description and operation DescriptionHeated Oxygen Sensor (HO2S) consists of the zirconium and the alumina and is installed on upstream and downstream of the Manifold Catalyst Converter (MCC).

CVVT Oil Temperature Sensor (OTS)❯

Description and operation DescriptionContinuous 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.

Other information:

Hyundai Elantra (CN7) 2021-2026 Service Manual: Components and components location

Hyundai Elantra (CN7) 2021-2026 Service Manual: Repair procedures

Refrigerant System Service Basics (R-134a)Refrigerant Recovery Use only service equipment that is U.L-listed and is certified to meet the requirements of SAE J2210 to remove HFC-134a(R-134a) from the air conditioning system. • Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or