Hyundai Elantra: Dual Clutch Transmission Control System / Input Speed Sensor

Hyundai Elantra (CN7) 2021-2025 Service Manual / DCT(Dual Clutch Transmission) System / Dual Clutch Transmission Control System / Input Speed Sensor

Description and operation

Description

•	Components location : DCT (Dual Clutch Transmission)

•

Function

The input shaft speed sensor is important in that it detects the input shaft RPM and sends this information to the Transmission Control Module (TCM).

It provides important input information for electric control.

The information is needed in all operations, including feedback control, gear shift control and failure detection of other sensors.

Specifications

Specification

Item	Specification
Type	Hall effect sensor
Output signal	High: 11.8 - 16.8 mA
Output signal	Low: 5.9 - 8.4 mA

Schematic diagrams

Circuit Diagram

Components and components location

Components

1. Input shaft speed sensor 1 (Odd)

2. Input shaft speed sensor 2 (Even)

Repair procedures

Inspection

The DCT system can be more quickly diagnosed for troubles by using the vehicle diagnostic system (diagnostic tool). (Refer to DTC guide)

diagnostic tool provides the following information.

1)	Self diagnosis : Inspects and displays diagnostic trouble code (DTC)

2)	Sensor data : Checks the system input/output value status

3)	Forced operation : Checks the system operating status

4)	Additional function : Controls system options, zero point adjustment and other functions

Removal

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

2.	Remove the air cleaner assembly and air duct. (Refer to Engine Mechnical System - "Air cleaner")

3.	Disconnect the input shaft speed sensor connector (A).

4.	Remove the clutch actuator. (Refer to Dual Clutch Transmission Control System - "Clutch Actuator & TCM Assembly")

Remove the input shaft speed sensor (A).

Tightening torque :

9.8 - 11.8 N.m (1.0 - 1.2kgf.m, 7.2 - 8.7 lb-ft)

Installation

Install in the reverse order of removal.

•	Before installing the input speed sensor,check the assembled state of the O-rings (A) and should apply gear oil to the surface of O- rings.

Gear Actuator Assembly

Description and operation Description• Gear actuator uses signals from TCM to control the gear. Specifications Specification Item Specification Operation condition-40 to 257 °F (- 40 to 125 °C )Rated voltage12V Components and components location Components1...

Inhibitor Switch

Description and operation Description• The inhibitor switch is installed on top of transmission, and is connected to the shift lever through shift cable...

Other information:

Hyundai Elantra (CN7) 2021-2025 Owner's Manual: Function operation

Basic function Function warning and control The basic feature of Forward Collision- Avoidance Assist is to help warn and control the vehicle depending on collision level: ‘Collision Warning’, ‘Emergency Braking’ and ‘Stopping vehicle and ending brake control ’...

Hyundai Elantra (CN7) 2021-2025 Owner's Manual: Brake fluid

Checking the brake fluid level Check the fluid level in the reservoir periodically. The fluid level should be between MAX and MIN marks on the side of the reservoir. Before removing the reservoir cap and adding brake fluid, clean the area around the reservoir cap thoroughly to prevent brake fluid contamination...

Rear center seat belt

When using the rear center seat belt, the buckle with the “CENTER” mark must be used.

WARNING

Make sure that the seatback is locked in place when using the rear center seat belt.

If not, the seatback may move when there is a sudden stop or collision, which could result in serious injury.