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.)
|
| 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).
|
| Installation |
| 1. | To install, reverse the removal procedure.
|
| 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
|
Description and operation
DescriptionThe Dual Clutch Transmission (DCT) control system measures required data to identify the state of the control target and computes the appropriate compensation value if adjustment is necessary...
Clutch Actuator & TCM Assembly
Specifications
Specification
Item
Specification
Rated voltage12VRod length79.0 - 80.0 mm (3.1102 - 3...
Other information:
Hyundai Elantra (CN7) 2021-2024 Service Manual: Components and components location
Component Location1. DDM (Driver Door Module)2. ADM (Assist Door Module)3. Integrated Central Control Unit (ICU)4. Door lock knob5. Trunk lid actuator6. Door latch module7. Door lock/unlock switch8. RLDM (Rear Left Door Module)9. RRDM (Rear Right Door Module)..
Hyundai Elantra (CN7) 2021-2024 Service Manual: Troubleshooting
TroubleshootingIgnition System Symptom Suspect Area Remedy Engine will not start or is hard to start (Cranks OK)Ignition lock switchInspect ignition lock switch, or replace as requiredIgnition coilInspect ignition coil, or replace as requiredSpark plugsInspect spark plugs, or replace as requiredIgnition wiring disconne..
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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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