Kia Optima Hybrid: Automatic Transaxle Control System / 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 to ensure ...

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 point. If the problem ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Description and Operation


Description Ignition timing is controlled by the electronic control ignition timing system. The standard reference ignition timing data for the engine operating conditions are preprogrammed in the memory of the ECM (Engine Control Module). The engine operating conditions (speed, load, warm-up condition, ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Automatic Transaxle Description and Operation


Description Automatic Transaxle’s Role Both the engine clutch and the motor are mounted within the automatic transaxle assembly. The engine clutch is used to link the engine with the transaxle. The motor is used to turn the input of the transaxle or can be used as a generator. When used as a generator, ...

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