Hyundai Accent (HC): Engine Control System / ETC (Electronic Throttle control) System

- Description The Electronic Throttle Control (ETC) System consists of a throttle body with an integrated control motor and throttle position sensor (TPS). Instead of the traditional throttle cable, an Accelerator Position Sensor (APS) is used to receive driver input. The ECM uses the APS signal to calculate the target throttle angle; the position of the throttle is then adjusted via ECM control of the ETC motor. The TPS signal is used to provide feedback regarding throttle position to the ECM. Using ETC, precise control over throttle position is possible; the need for external cruise control modules/cables is eliminated.

- Specification Throttle Position Sensor (TPS) ▷ Type : Absolute Rotary Sensor IC▷ Specification

[ETC Motor]

ItemSensor Resistance
Coil Resistance (Ω)1.4 ~ 1.5 [25 ± 5°C (77 ± 41°F)]

- Fail-safe Mode
ItemsFail-safe
ETC MotorThrottle valve stuck at 9.2°
TPSTPS 1 faultReplace it with TPS 2
TPS 2 faultReplace it with TPS 1
TPS 1, 2 faultThrottle valve stuck at 9.2°

   

• When throttle valve is stuck at 9.2°, engine speed is limited at 1,200 ~ 1,700 rpm.

- Schematic Diagram

- Circuit Diagram [M/T]

Harness Connector

[A/T]

Harness Connector

- Inspection Throttle Position Sensor (TPS)

1.Connect a GDS on the Data Link Connector (DLC).

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

Specification : Refer to Specification Section.

ETC Motor

1.Turn the ignition switch OFF.

2.Disconnect the ETC module connector.

3.Measure resistance between the ETC module terminals 1 and 2.

4.Check that the resistance is within the specification.

Specification : Refer to Specification Section.

- Removal

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

2.Remove the resonator and the air intake hose.(Refer to Engine Mechanical System - "Air Cleaner")

3.Disconnect the ETC module connector (A).

4.Remove the installation bolts and then remove the ETC module (B) from the engine.

5.Disconnect the vapor hose (C).

Electronic throttle body Installation bolt :9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

- Cleaning

1.Remove the ETC Module.(Refer to Engine Control System - "ETC System")

2.Keep the ETC module plate (A) open.

3.Clean the pollutant in the throttle body with a soft cloth moistened with cleaning fluid.

   

• Do not spray cleaning fluid directly onto ETC. Use a lint free cloth moistened with cleaning fluid.

• Be careful not to clean the coating fluid around the shaft. If coating fluid is removed, idling control failure might occur by foreign substance inflow or excessive air leakage.

4.After cleaning, re-install the ETC module and then perform the ETC module learning procedure.(Refer to Engine Control System - "ETC System" - Adjustment)

- Installation

   

• Install the component to the specified torques.

• Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.

1.Install in the reverse order of removal.

- Adjustment ETC module learning procedure Be sure to perform the ETC module learning procedure when replacing or re-installing the ETC module.

1.Wait for 1 minute with the ignition switch ON.

2.Start the engine and hold the idle status for 15 minutes.

3.Waif for 1 minute with the ignition switch OFF.

4.Restart the engine, and check that the idle speed is stable.

   

• If the ETC module learning procedure is not performed after replacing or reinstalling the ETC module, MIL illumination with DTCs may occur.

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: TPMS Sensor

- Description 1.General descriptionWU is a sensor placed in the tire that reports pressure and temperature.The WU is mounted inside the wheels, fixed to the valve. The angle between the valve and the housing of the WU is variable.This allows adaptation to various types of rims.The Wheel Unit is made of a PCB supporting the electronic hardware and encapsulated inside a housing which is potted with polyurethane.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Control Shaft Complete

- Components 1. Control shaft complete - Removal 1.Set shift lever to N position. 2.Turn OFF ignition switch and disconnect the negative (-) battery cable. 3.Remove the air cleaner assembly and air duct.(Refer to Engine Mechanical System - "Air Cleaner") 4.Remove the battery and battery tray.(Refer to Engine Electrical System - "Battery") 5.

Categories


 
Copyright © 2025
0.0066