Hyundai Elantra: Automatic Transaxle Control System / Transaxle Control Module (TCM) Repair procedures
Hyundai Elantra AD (2016-2020) Service Manual / Automatic Transaxle System / Automatic Transaxle Control System / Transaxle Control Module (TCM) Repair procedures
| Inspection |
Transaxle Control Module(TCM) Problem Inspection Procedure
| 1. |
TEST TCM GROUND CIRCUIT: Measure resistance between TCM and
chassis ground using the backside of TCM harness connector as TCM side
check point. If the problem is found, repair it.
|
| 2. |
TEST TCM CONNECTOR: Disconnect the TCM connector and visually
check the ground terminals on TCM side and harness side for bent pins
or poor contact pressure. If the problem is found, repair it. |
| 3. |
If problem is not found in Step 1 and 2, the TCM could be
faulty. If so, make sure there were no DTC's before swapping the TCM
with a new one, and then check the vehicle again. If DTC's were found,
examine this first before swapping TCM. |
| 4. |
RE-TEST THE ORIGINAL TCM: Install the original TCM (may be
broken) into a known-good vehicle and check the vehicle. If the problem
occurs again, replace the original TCM with a new one. If problem does
not occur, this is intermittent problem (Refer to “Intermittent Problem
Inspection Procedure” in Basic Inspection Procedure).
|
| Removal |
| 1. |
Oil-pressure characteristics backup (TCM exchange)
|
| 2. |
Turn ignition switch OFF. |
| 3. |
Disconnect the negative (-) battery cable. |
| 4. |
Remove the air cleaner assembly and air duct.(Refer to Engine Mechanical System - "Air cleaner") |
| 5. |
Disconnect the TCM connector (A).
|
| 6. |
Remove the fixing clip (A) of wiring. |
| 7. |
Remove the TCM (B).
|
| Installation |
| 1. |
To install, reverse the removal procedure. |
| 2. |
Oil-pressure characteristics input (TCM exchange)
|
| 3. |
Perform the procedures related in the ECM after replacing the TCM.
(Refer to Engine Control / Fuel System - "Engine Control Module") |
| 4. |
Perform TCM learning after replacing the transaxle to prevent slow transaxle response, jerky acceleration and jerky startup.
(Refer to Automatic Transaxle Control System - "Repair procedures") |
Transaxle Control Module (TCM) Schematic Diagrams
TCM Connector and Terminal Function
TCM Terminal Function
Connector [A] Connector [K] PinDescriptionPinDescriptionA1Overdrive clutch control solenoid valve(OD/C_VFS)K8FLEXRAY COMM. Signal HIGHA5 ...
Transaxle Oil Temperature Sensor Description and Operation
Description
•
Transaxle oil temperature sensor monitors the automatic transaxle fluid's temperature and conveys the readings to TCM.
•
It is an NTC (Negative Thermal Coefficient) senso ...
Other information:
Hyundai Elantra AD (2016-2020) Service Manual: TPMS Receiver Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box.
(Refer to Body - "Glove Box Upper Cover Assembly")
3.
Remove the smart key unit.
(Refer to Body - "Smart Key Unit")
4.
Disconnect the body control module connectors (A).
5.
Remove the body control ...
Hyundai Elantra AD (2016-2020) Service Manual: Repair procedures
Operation and Leakage Check
Check all of the following items:
ComponentProcedureBrake Booster (A)Check brake operation by applying the brakes during a test
drive. If the brakes do not work properly, check the brake booster.
Replace the brake booster as an assembly if it does not work properl ...
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