Hyundai Creta: Automatic Transaxle Control System / Transaxle Control Module (TCM)
Hyundai Creta GS 2014-2026 Service Manual / Automatic Transaxle System / Automatic Transaxle Control System / Transaxle Control Module (TCM)
Description and operation
| Description |
| • |
Monitoring the vehicle's operating conditions to determine the optimal
gear setting.
|
| • |
Performing a gear change if the current gear setting differs from the
identified optimal gear setting.
|
| • |
Determining the need for damper clutch (D/C) activation and engages
the clutch accordingly.
|
| • |
Calculating the optimal line pressure level by constantly monitoring
the torque level and adjusts the pressure accordingly.
|
| • |
Diagnosing the automatic transaxle for faults and failures.
|
Schematic diagrams
| 1. TCM Connector and Terminal Function |
| 2. TCM Terminal Function |
Connector [A]
|
Pin |
Description |
Pin |
Description |
|
22 |
Overdrive clutch control solenoid valve (OD/C_VFS) |
73 |
Inhibitor switch signal "S4" |
|
23 |
Pressure control solenoid (VFS-LINE) |
74 |
Inhibitor switch signal "S2" |
|
26 |
ON/OFF solenoid valve B (SS-B) |
75 |
Inhibitor switch signal "S3" |
|
37 |
Sports mode up switch |
87 |
Solenoid power 1 |
|
38 |
Sports mode select switch |
88 |
Solenoid power 2 |
|
39 |
Oil temperature sensor (-) |
89 |
ON/OFF solenoid valve A (SS-A) |
|
43 |
Underdrive brake control solenoid valve (UD/B_VFS) |
94 |
Inhibitor switch signal "S1" |
|
44 |
35R clutch control solenoid valve (35R/C_VFS) |
95 |
Output speed sensor power |
|
45 |
Torque converter control solenoid (T/CON_VFS) |
96 |
Input speed sensor power |
|
46 |
26 brake control solenoid valve (26/B_VFS) |
99 |
Input speed sensor signal |
|
58 |
Sports mode down switch |
100 |
Output speed sensor signal |
|
59 |
Oil temperature sensor (+) |
|
|
Connector [B]
|
Pin |
Description |
Pin |
Description |
|
1 |
GND (Power) |
5 |
VB (Battery voltage) |
|
2 |
GND (Power) |
60 |
CAN High |
|
3 |
VB (Battery voltage) |
68 |
IG.1 ( Ignition key) |
|
4 |
Ground (Power) |
77 |
CAN Low |
| TCM Terminal input/ output signal |
Connector [A]
|
Pin |
Description |
Condition |
Input/output value |
|
|
Type |
Level |
|||
|
22 |
Overdrive clutch control solenoid valve (OD/C_VFS) |
- |
Output |
0V / Battery voltage level |
|
9V < Battery voltage level < 16V |
||||
|
23 |
Line pressure control solenoid valve (LINE_VFS) |
- |
Output |
0V / Battery voltage level |
|
9V < Battery voltage level < 16V |
||||
|
26 |
ON/OFF solenoid valve B (SS-B) |
High |
Output |
0V / Battery voltage level |
|
Low |
9V < Battery voltage level < 16V |
|||
|
37 |
Sports mode up switch |
Up ON |
Input |
0V / Battery voltage level |
|
Other |
9V < Battery voltage level < 16V |
|||
|
38 |
Sports mode select switch |
Sport mode |
Input |
0V / Battery voltage level |
|
Other |
9V < Battery voltage level < 16V |
|||
|
39 |
Oil temperature sensor (+) |
ON |
Input |
0V / 3.3V |
|
OFF |
||||
|
43 |
Underdrive brake control solenoid valve (UD/B_VFS) |
- |
Output |
0V / Battery voltage level |
|
9V < Battery voltage level < 16V |
||||
|
Power supply : V_SOL2 |
||||
|
44 |
35R clutch control solenoid valve (35R/C_VFS) |
- |
Output |
0V / Battery voltage level |
|
9V < Battery voltage level < 16V |
||||
|
45 |
Torque converter control solenoid valve (T/CON_VFS) |
- |
Output |
0V / Battery voltage level |
|
9V < Battery voltage level < 16V |
||||
|
46 |
26 brake control solenoid valve (26/B_VFS) |
- |
Output |
0V / Battery voltage level |
|
9V < Battery voltage level < 16V |
||||
|
Power supply : V_SOL2 |
||||
|
58 |
Sports mode down switch |
Down ON |
Input |
0V
/ Battery voltage level |
|
Other |
9V < Battery voltage level < 16V |
|||
|
59 |
Oil temperature sensor (-) |
- |
Ground |
0V |
|
73 |
Inhibitor switch signal "S4" |
High |
Input |
0V / Battery voltage level |
|
Low |
9V < Battery voltage level < 16V |
|||
|
74 |
Inhibitor switch signal "S2" |
High |
Input |
0V / Battery voltage level |
|
Low |
9V < Battery voltage level < 16V |
|||
|
75 |
Inhibitor switch signal "S3" |
High |
Input |
0V / Battery voltage level |
|
Low |
9V < Battery voltage level < 16V |
|||
|
89 |
ON/OFF solenoid valve A (SS-A) |
High |
Output |
0V / Battery voltage level |
|
Low |
9V < Battery voltage level < 16V |
|||
|
94 |
Inhibitor switch signal "S1" |
High |
Input |
0V / Battery voltage level |
|
Low |
9V < Battery voltage level < 16V |
|||
|
95 |
Output speed sensor power |
ON |
Power |
0V / 7.5V |
|
OFF |
||||
|
96 |
Input speed sensor power |
ON |
Power |
0V / 7.5V |
|
OFF |
||||
|
99 |
Input speed sensor signal |
High |
Input |
0.7V / 1.4V |
|
Low |
||||
|
100 |
Output speed sensor signal |
High |
Input |
0.7V / 1.4V |
|
Low |
||||
| Circuit Diagram |
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. |
Turn ignition switch OFF.
|
| 2. |
Disconnect the negative (-) battery cable.
|
| 3. |
Remove the battery.
|
| 4. |
Disconnect the TCM connector (A).
|
| 5. |
Remove the TCM (A) after removing the bolt and nut.
|
| Installation |
| 1. |
Install in the reverse order of removal.
|
Repair procedures
Adjustment
Transaxle Control Module
(TCM) Learning
When shift shock is occurred or parts related with the transaxle are replaced,
TCM learning should be performed.
...
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Description
•
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