Kia Optima: Transaxle Control Module (TCM) Schematic Diagrams - Automatic Transaxle Control System - Automatic Transaxle SystemKia Optima: Transaxle Control Module (TCM) Schematic Diagrams

TCM connector and terminal function

TCM terminal function

Connector [A]
Pin
Description
Pin
Description
2
-
33
ON/OFF solenoid valve A (SS-A)
3
Line pressure control solenoid valve (LINE_VFS)
34
Ground (Power 1)
4
Engine clutch control solenoid valve (EC_VFS)
35
Ground (Power 2)
5
35R clutch control solenoid valve (35R/C_VFS)
36
Sports mode down switch
6
Input speed sensor power
37
Sports mode up switch
7
Output speed sensor power
38
Sports mode select switch
8
Input speed sensor signal
40
Inhibitor switch signal "S1"
9
Output speed sensor signal
47
Solenoid supply power 1
17
Underdrive brake control solenoid valve
(UD/B_VFS)
48
Solenoid supply power 2
49
TCM Input power 1 (For solenoid)
18
26 brake control solenoid valve (26/B_VFS)
50
TCM Input power 2 (For solenoid)
19
Shift lock solenoid
51
PWM_command
20
Overdrive clutch control solenoid valve
(OD/C_VFS)
52
Status_OPU
53
Oil temperature sensor (-)
25
Inhibitor switch signal "S2"
54
Oil temperature sensor (+)
26
Inhibitor switch signal "S3"
55
CAN communication line (HIGH)
27
Inhibitor switch signal  "S4"
56
CAN communication line (Low)
32
ON/OFF solenoid valve B (SS-B)
56
CAN communication line (Low)
33
ON/OFF solenoid valve A (SS-A)
?
?

Connector [B]
Pin
Description
Pin
Description
1
Power ground
4
Battery power (B+)
2
Battery power (B+)
5
ECU ground
3
Power ground
6
Battery power (B+)

TCM Terminal input/ output signal
Pin
Description
Condition
Input/output value
Type
Level
3
Line pressure control solenoid valve (LINE_VFS)
?
Output
0V/Battery voltage level
9V < Battery voltage level < 16V
4
Engine clutch control solenoid valve (EC_VFS)
?
Output
0V/Battery voltage level
9V < Battery voltage level < 16V
5
35R clutch control solenoid valve (35R/C_VFS)
?
Output
0V/Battery voltage level
9V < Battery voltage level < 16V
6
Input speed sensor power
ON
Power
0V/7.5V
OFF
7
Output speed sensor power
ON
Power
0V/7.5V
OFF
8
Input speed sensor signal
High
Input
0.7V/1.4V
Low
9
Output speed sensor signal
High
Input
0.7V/1.4V
Low
17
Underdrive brake control solenoid valve (UD/B_VFS)
?
Output
0V/Battery voltage level
9V < Battery voltage level < 16V
Power supply : V_SOL2
18
26 brake control solenoid valve (26/B_VFS)
?
Output
0V/Battery voltage level
9V < Battery voltage level < 16V
Power supply : V_SOL2
19
Shift lock solenoid
High
Output
0V/Battery voltage level9V < Battery voltage level < 16V
Low
20
Overdrive clutch control solenoid valve (OD/C_VFS)
?
Output
0V/Battery voltage level
9V < Battery voltage level < 16V
Power supply : V_SOL1
22
Rear lamp relay
R  ON
Output
0V/Battery voltage level
9V < Battery voltage level < 16
Other
25
Inhibitor switch signal "S2"
High
Input
0V/Battery voltage level
9V < Battery voltage level < 16V
Low
26
Inhibitor switch signal "S3"
High
Input
0V/Battery voltage level
9V < Battery voltage level < 16V
Low
27
Inhibitor switch signal "S4"
High
Input
0V/Battery voltage level
9V < Battery voltage level < 16V
Low
32
ON/OFF solenoid valve B(SS-B)
High
Output
0V / Battery voltage level
9V < Battery voltage level < 16V
Low
33
ON/OFF solenoid valve A (SS-A)
High
Output
0V / Battery voltage level
9V < Battery voltage level < 16V
Low
34
Ground (Power 1)
?
?
Ground
0V
35
Ground (Power 2)
Ground
0V
36
Sports mode down switch
Down ON
Input
 0V/Battery voltage level
9V < Battery voltage level < 16V
Other
37
Sports mode up switch
Up ON
Input
0V/Battery voltage level
9V < Battery voltage level < 16V
Other
38
Sports mode select switch
Sport mode
Input
0V/Battery voltage level
9V < Battery voltage level < 16V
Other
40
Inhibitor switch signal "S1"
High
Input
0V/Battery voltage level
9V < Battery voltage level < 16
Low
47
Solenoid supply power 1
ON
Power
0V/Battery voltage level
9V < Battery voltage level < 16V
OFF
48
Solenoid supply power 2
ON
Power
0V/Battery voltage level
9V < Battery voltage level < 16V
OFF
49
TCM Input power 1 (For solenoid)
?
Power
Battery voltage level
9V < Battery voltage level < 16V
50
TCM Input power 2 (For solenoid)
?
Power
Battery voltage level
9V < Battery voltage level < 16
51
PWM_command
?
?
Output
0V / Battery voltage level
9V < Battery voltage level < 16V
52
Status_OPU
Input
0V / Battery voltage level
9V < Battery voltage level < 16V
53
Oil temperature sensor (-)
?
Ground
0V
54
Oil temperature sensor (+)
ON?
Input?
?0V/3.3V
OFF
55
CAN communication line (HIGH)
High?
Command?
?
Low?
56
CAN communication line (Low)?
High?
Command?
?
Low?

Circuit Diagram


Transaxle Control Module (TCM) Description and Operation
Description Transaxle Control Module (TCM) is the automatic transaxle''s brain. The module receives and processes signals from various sensors and implements a wide range of transaxle controls ...

Transaxle Control Module (TCM) Repair procedures
Inspection 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 poin ...

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