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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 ...

See also:

Turn Signal Lamp Repair procedures
Removal Door Mirror Turn Signal Lamp 1. Disconnect the negative (-) battery terminal. 2. Remove the mirror (C) after disconnecting the heater connector (A) and BSD warning connector (B). 3 ...

Installation
Installation is in the reverse order of removal. Perform the following : • Adjust a shift cable. • Refill engine with engine oil. • Refill a transaxle with ...

Rear Seat Armrest
This armrest is located in the center of the rear seatback. Pull the armrest down using the strap provided on the armrest. To open the armrest cover, press the button on the top of the cover and ...

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