Kia Forte: Dual Clutch Transmission Control System / DCT Control Module (TCM)

Kia Forte 2019-2020 (BD) Service Manual / DCT(Dual Clutch Transmission) System / Dual Clutch Transmission Control System / DCT Control Module (TCM)

Schematic diagrams
TCM Connector

TCM Terminal Function

Connector [A]

Pin
Description
Pin
Description
1
Clutch actuator (Clutch motor 1 (Odd)_Phase V)
15
Clutch actuator (Clutch motor 1 (Odd)_Sensor ground)
2
Clutch actuator (Clutch motor 2 (Even)_Phase V)
18
Clutch actuator (Clutch motor 1 (Odd)_Hall 1)
3
Select actuator (Select solenoid 2 (Even)_Sensor ground)
19
Clutch actuator (Clutch motor 1 (Odd)_Supply)
4
Select actuator (Select solenoid 1 (Odd)_Push)
20
Select actuator (Select solenoid 1 (Odd)_Sensor supply)
5
Clutch actuator (Clutch motor 1 (Odd)_Phase U)
21
Select actuator (Select solenoid 2 (Even)_Sensor supply)
6
Clutch actuator (Clutch motor 2 (Even)_Phase U)
22
Select actuator (Select solenoid 2 (Even)_Sensor ouput)
7
Select actuator (Select solenoid 1 (Odd)_Sensor ground)
23
Clutch actuator (Clutch motor 2 (Even)_Hall 2)
8
Select actuator (Select solenoid 2 (Even)_ Pull)
24
Clutch actuator (Clutch motor 2 (Even)_Hall 3)
9
Clutch actuator (Clutch motor1 (Odd)_Phase W)
25
Clutch actuator (Clutch motor 2 (Even)_Sensor ground)
10
Clutch actuator (Clutch motor 2 (Even)_Phase W)
26
Select actuator (Select solenoid 1 (Odd)_Sensor output)
11
Select actuator (Shifts olenoid 1 (Odd)_Pull)
28
Clutch actuator (Clutch motor 2 (Even)_Hall 1)
12
Select actuator (Shift solenoid 2 (Even)_Push)
29
Clutch actuator (Clutch motor 2 (Even)_Sensor supply)
13
Clutch actuator (Clutch motor 1 (Odd)_Hall 2)
30
Select actuator (Select solenoid 1 (Odd)_Sensor ground)
14
Clutch actuator (Clutch motor (Odd)_Hall 3)
31
Select actuator (Select solenoid 2 (Even)_Sensor ground)

Connector [B]

Pin
Description
Pin
Description
3
ON / START input
42
Shift actuator (Shift motor 2 (Even) _Hall 3)
5
Inhibitor switch "P" input signal
43
Inhibitor switch "M" Input signal
6
Inhibitor switch "R" input signal
44
CAN1 communication port1 High
7
Inhibitor switch "D" input signal
45
CAN1 communication port1 low
8
Manual mode "Down" switch
48
Flex ray high (BP)
9
Input speed sensor signal 2 (Even)
49
Input speed supply 1 (Odd)
13
Shift actuator (Shift motor 1 (Odd) _Hall 2)
50
Input speed signal 1 (Odd)
14
Shift actuator (Shift motor 1 (Odd) _Hall 3)
54
Shift actuator (Shift motor 2 (Even) _Sensor supply)
17
Battery power low VBD 
55
Shift actuator (Shift motor 2 (Even) _Hall 1)
19
Manual mode "Select" switch
56
Shift actuator (Shift motor 2 (Even) _Sensor ground)
20
Inhibitor switch "N" input signal
57
Power ground 1 for high current modules
21
Manual mode "Up" switch
58
Power ground 2 for high current modules
23
Input speed supply 2 (Even)
59
Shift actuator (Shift motor 2 (Even)_Phase W)
24
5V spare supply output
60
Shift actuator (Shift motor 1 (Odd)_Phase W)
26
Shift actuator (Shift motor 1 (Odd)_Sensor supply
61
 Power ground 3 for high current modules
27
Shift actuator (Shift motor 1 (Odd)_Hall 1)
63
Shift Actuator (Shift motor 2 (Even)_Phase V)
28
Shift actuator (Shift motor 1 (Odd)_Sensor ground)
64
Shift Actuator (Shift Motor 1 (Odd)_Phase V)
30
CAN2 communication port2 High
65
Motor supply voltage 1 from direct battery
31
CAN2 communication port2 Low
66
Motor supply voltage 2 from direct battery
34
Flex ray bus, BM
67
Shift actuator (Shift motor 2 (Even)_Phase U)
41
Shift actuator (Shift motor 2 (Even) _Hall 2)
68
Shift actuator (Shift motor 1 (Odd)_Phase U)

Terminal input/output signal

Connector [A]

Pin
Description
Condition
Input / output value
Type
Level
1
Clutch actuator (Clutch motor 1 (Odd)_Phase V)
Low
Output
0V
PWM
0V ~ Battery voltage
2
Clutch actuator (Clutch motor 2 (Even)_Phase V)
Low
Output
0V
PWM
0V ~ Battery voltage
3
Select actuator (Select solenoid 2 (Even)_Sensor ground)
Static on
Output
0V
4
Select actuator (Select solenoid 1 (Odd)_Push)
On
Output
Battery voltage
Off
0V
5
Clutch actuator (Clutch motor 1 (Odd)_Phase U)
Low
Output
0V
PWM
0V ~ Battery voltage
6
Clutch actuator (Clutch motor 2 (Even)_Phase U)
Low
Output
0V
PWM
0V ~ Battery voltage
7
Select actuator (Select solenoid 1 (Odd)_Sensor ground)
Static on
Output
0V
8
Select actuator (Select solenoid 2 (Even)_ Pull)
On
Output
Battery voltage
Off
0V
9
Clutch actuator (Clutch motor1 (Odd)_Phase W)
Low
Output
0V
PWM
0V ~ Battery voltage
10
Clutch actuator (Clutch motor 2 (Even)_Phase W)
Low
Output
0V
PWM
0V ~ Battery voltage
11
Select actuator (Select solenoid 1 (Odd)_Pull)
On
Output
Battery voltage
Off
0V
12
Select actuator (Select solenoid 2 (Even)_Push)
On
Output
Battery voltage
Off
0V
13
Clutch actuator (Clutch motor 1 (Odd)_Hall 2)
High
Input
4.5V
Low
0V
14
Clutch actuator (Clutch motor (Odd)_Hall 3)
High
Input
4.5V
Low
0V
15
Clutch actuator (Clutch motor 1 (Odd)_Sensor ground)
Ground
Ground
0V
18
Clutch actuator (Clutch motor 1 (Odd)_Hall 1)
High
Input
4.5V
Low
0V
19
Clutch actuator (Clutch motor 1 (Odd)_Sensor supply)
-
Power
8.75V
20
Select actuator (Select solenoid 1 (Odd)_Sensor supply)
-
Power
8.75V
21
Select Actuator (Select solenoid 2 (Even)_Sensor Supply)
-
Power
8.75V
22
Select actuator (Select solenoid 2 (Even)_Sensor ouput)
High
Input
4V
Low
1V
23
Clutch actuator (Clutch motor 2 (Even)_Hall 2)
High
Input
4.5V
Low
0V
24
Clutch actuator (Clutch motor 2 (Even)_Hall 3)
High
Input
4.5V
Low
0V
25
Clutch actuator (Clutch motor 2 (Even)_Sensor ground)
Ground
Ground
0V
26
Select actuator (Select solenoid 1 (Odd)_Sensor output)
High
Input
4V
Low
1V
28
Clutch actuator (Clutch motor 2 (Even)_Hall 1)
High
Input
4.5V
Low
0V
29
Clutch actuator (Clutch motor 2 (Even)_Supply)
-
Power
8.75V
30
Select actuator (Select solenoid 1 (Odd)_Sensor ground)
Ground
Ground
0V
31
Select actuator (Select solenoid 2 (Even)_Sensor ground)
Ground
Ground
0V

Connector [B]

Pin
Description
Condition
Input / output value
Type
Level
3
ON / START input
-
Power
9V < Battery voltage < 16V
5
Inhibitor switch "P" input signal
High
Input
9V < Battery voltage < 16V
Low
0V
6
Inhibitor switch "R" input signal
High
Input
9V < Battery voltage < 16V
Low
0V
7
Inhibitor switch "D" input signal
High
Input
9V < Battery voltage < 16V
Low
0V
8
Manual mode "Down" switch
High
Input
9V < Battery voltage < 16V
Low
0V
9
Input speed sensor signal 2 (Even)
High
Input
0.448V
Low
0.224V
13
Shift actuator (Shift motor 1 (Odd) _Hall 2)
High
Input
4.5V
Low
0.8
14
Shift actuator (Shift motor 1 (Odd) _Hall 3)
High
Input
4.5V
Low
0.8
17
Battery power low VBD 
-
Power
9V < Battery voltage < 16V
18
Paddle shift down signal
High
Input
9V < Battery voltage < 16V
Low
0V
19
Shift lever select switch
High
Input
9V < Battery voltage < 16V
Low
0V
20
Inhibitor switch "N" input signal
High
Input
9V < Battery voltage < 16V
Low
0V
21
Manual mode "Up" switch
High
Input
9V < Battery voltage < 16V
Low
0V
23
Input speed supply 2 (Even)
-
Power
8.75V
24
5V spare supply output
-
Power
5V
26
Shift actuator (Shift motor 1 (Odd)_Sensor supply)
 
Power
8.75V
27
Shift actuator (Shift motor 1 (Odd)_Hall 1)
High
Input
4.5V
Low
0.8V
28
Shift actuator (Shift Motor 1 (Odd)_Sensor Ground)
Ground
Ground
0V
30
CAN2 communication port2 High
Rec./Dom
CAN Line
Recessive : 2.5V
Dominant : 3.5V
31
CAN2 communication port2 Low
Rec./Dom
CAN Line
Recessive : 2.5V
Dominant : 1.5V
34
Flex ray bus, BM
Idle
CAN Line
Idle : 2.5V
Differential
Differential : 2.0 V / 3.0 V
41
Shift actuator (Shift motor 2 (Even) _Hall 2)
High
Input
4.5V
Low
0.8V
42
Shift actuator (Shift motor 2 (Even) _Hall 3)
High
Input
4.5V
Low
0.8V
43
Inhibitor switch "M" input signal
High
Input
9V < Battery voltage < 16V
Low
0V
44
CAN1 communication port1 High
Idle
CAN Line
 
Differential
 
45
CAN1 communication port1 Low
Idle/Diff.
Rec./Dom
Recessive : 2.5V
Dominant : 3.5V 
48
Flex ray High (BP)
Idle/Diff.
CAN Line
Idle : 2.5V
Differenital : 2.0V / 3.0V
49
Input speed supply 1 (Odd)
-
Power
8.75V
 
50
Input speed signal 1 (Odd)
High
Input
0.448V
Low
0.224V
54
Shift actuator (Shift motor 2 (Even) _Sensor supply)
-
Power
8.75V
55
Shift actuator (Shift motor 2 (Even) _Hall 1)
High
Input
4.5V
Low
0.8V
56
Shift actuator (Shift motor 2 (Even) _Sensor ground)
Ground
Ground
0V
57
Power ground 1 for high current modules
Ground
Ground
0V
58
Power ground 2 for high current modules
Ground
Ground
0V
59
Shift actuator (Shift motor 2 (Even)_Phase W)
Low
Output
0V
PWM
0V~Battery voltage
60
Shift actuator (Shift motor 1 (Odd)_Phase W)
Low
Output
0V
PWM
0V~Battery voltage
61
 Power ground 3 for high current modules
Ground
Ground
Ground
63
Shift actuator (Shift motor 2 (Even)_Phase V)
Low
Output
0V
PWM
0V~Battery voltage
64
Shift actuator (Shift motor 1 (Odd)_Phase V)
Low
Output
0V
PWM
0V~Battery voltage
65
Motor supply voltage 1 from direct battery
-
Power
9V < Battery voltage < 16V
66
Motor supply voltage 2 from direct battery
-
Power
9V < Battery voltage < 16V
67
Shift actuator (Shift motor 2 (Even)_Phase U)
Low
Output
0V
PWM
0V~Battery voltage
68
Shift actuator (Shift motor 1 (Odd)_Phase U)
Low
Output
0V
PWM
0V~Battery voltage

Circuit Diagram

Repair procedures
Inspection
1.

TCM ground circuit test: Measure resistance between TCM and chassis ground using the backside of TCM harness connector as TCM side check point.

Specification : Below 1Ω

2.

TCM connector test: Disconnect the TCM connector and visually check the ground terminals on TCM side and harness side for bent pins or poor contact pressure.

3.

If problem is not found in Steps 1 and 2, the TCM could be faulty. If so, replace the TCM with a new one, and then check the vehicle again. If the vehicle operates properly, then the problem was likely with the TCM.

4.

The original TCM re-test : 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. If the problem does not occur, the problem was likely with other parts.

Removal
1.

Disconnect the battery negative (-) cable.

2.

Remove the Integrated central control unit (ICU).

(Refer to Body Electrical System - "Integrated Central Control Unit (ICU)")

3.

Disconnect the TCM connectors (A).

4.

Remove the TCM (A) after loosening the nuts.

Installation
1.

Install in the reverse order of removal.

  

Perform the clutch touch point learning procedure using the KDS after replacing TCM.

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