Hyundai Elantra Owners and Service Manuals

Hyundai Elantra: Dual Clutch Transmission Control System / DCT Control Module (TCM)

Hyundai Elantra (CN7) 2021-2024 Service Manual / DCT(Dual Clutch Transmission) System / Dual Clutch Transmission Control System / DCT Control Module (TCM)

Description and operation
Description
•
Function
The Transmission Control Module (TCM) is like the brain for the Dual Clutch Transmission (DCT). It receives information from various sensors for a wide range of transmission controls to provide an optimal driving environment for the driver. The TCM is programmed for optimal operation in all driving conditions. If the TCM malfunctions, store the failure information in memory and provide the error information to a mechanic for fast and accurate repair.
Components and components location
Components

1. Fork cover
2. Clutch actuator & TCM assembly
3. Clutch actuator assembly
4. O-ring
5. DCT control module (TCM)


Schematic diagrams
Connector and Terminal Function

Pin
Description
Pin
Description
1
Ground 2 (Power)
14
Battery power 2 (Motor)
2
Ground 1 (Power)
15
Battery power 1 (Motor)
3
Shift lock solenoid
16
Battery voltage (Low Power)
4
Paddle shift "Up"
17
P-CAN 1 Low
5
Paddle shift "Down"
18
P-CAN 1 High
6
Inhibitor switch signal "R"
19
Local-DCT 1 Low
7
Inhibitor switch signal "N"
20
Local-DCT 1 High
8
Inhibitor switch signal "D"
21
Local-DCT 2 Low
9
Inhibitor switch signal "P"
22
Local-DCT 2 High
10
-
23
PT-Local 1 Low
11
Ignition voltage
24
PT-Local 1 High
12
Input speed sensor signal 2 (Even)
25
Input speed sensor signal 1 (Odd)
13
Input speed sensor power 2 (9 V)
26
Input speed sensor power 1 (9 V)

Repair procedures
Inspection
Transmission Control Module (TCM) Inspection Procedure
1.
Inspecting TCM ground circuit: Measure the resistance between the TCM and chassis ground.
(Check the terminal connected to the chassis ground while using the back of the harness connector as the base point for TCM.)
Normal reading (resistance): Below 1Ω
2.
Inspecting the TCM connector: Disconnect the TCM connector and visually inspect to see whether there is a bend on the ground terminal of the harness connector. Also visually check the connection pressure.
3.
If no problem is found during inspection in step 1 and step 2, then the problem is with the TCM itself. In this case, replace the TCM and inspect the vehicle again.
4.
Re-inspecting TCM: Install the TCM that was determined to have malfunctioned from step 3 in another vehicle. Reset the error code and then check the operation in that vehicle. If the vehicle operates without any problems, then inspect the first vehicle with the initial problem again.
Removal
1.
Prior to replacing the TCM, check the TCM clutch compensation value with the diagnostic tool tool.

2.
Turn ignition switch OFF and disconnect the battery negative (-) terminal.
3.
Remove the clutch actuator assembly.
(Refer to Dual Clutch Transmission Control System - "Clutch Actuator Assembly")
4.
Loosen the bolts (A) and then removing the TCM (B).
Tightenning torque:
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)

Installation
1.
To install, reverse the removal procedure.
   
•
The existing O-rings (A) must be replaced with a new one. (Do not reuse it.)

2.
Perform the clutch compensation value setting procedure using the diagnostic tool after replacing TCM.

3.
Perform the clutch touch point learning procedure using the diagnostic tool after replacing TCM

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    Categories

    Tire Rotation

    To equalize tread wear, HYUNDAI recommends that the tires be rotated according to the maintenance schedule or sooner if irregular wear develops.

    During rotation, check the tires for correct balance.

    When rotating tires, check for uneven wear and damage. Abnormal wear is usually caused by incorrect tire pressure, improper wheel alignment, out-ofbalance wheels, severe braking or severe cornering. Look for bumps or bulges in the tread or side of the tire. Replace the tire if you find any of these conditions. Replace the tire if fabric or cord is visible. After rotation, be sure to bring the front and rear tire pressures to specification and check lug nut tightness (proper torque is 79~94 lbf·ft [11~13 kgf·m]).

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