DSM/TCU

Subpages

• DSM/TCU/TCU Numbers
• DSM/TCU/JG331A002C

Info

• https://www.dsmtuners.com/threads/1g-tcu-guide.277172/
• https://www.dsmtuners.com/threads/1g-tcu-awd-or-fwd.161911/#post-1342644
• https://www.dsmtuners.com/threads/1g-tcu-compatibility.379984/
• https://www.dsmtuners.com/threads/90-1g-tcu-wiring-diagram.503723/#post-153590821
• https://www.dsmtalk.com/threads/compatible-tcus.186535/
• http://www.vfaq.com/mods/Trannies.html
• https://w4a33.com/doku.php?id=tcu

Lists

• http://www.foreignecurepair.com/laserTCM.htm
• http://www.foreignecurepair.com/mitsubishi.htm

Codes

• https://web.archive.org/web/20070104065324/http://www.plymouthlaser.com/tcucodes.htm

Transmission Codes

Year	Model Name	Model Code	Class Code	Displacement	Engine	Transmission	Transmission MB part #
1990	Eclipse (50G)	D21A	MRHEL4M	1.8L	4G37	KM175-5-RS
1990	Eclipse (50G)	D22A	MRHML4M	2.0L	4G63	KM175-5-RDS
1992	Eclipse (50G)	D22A	MRHML4M	2.0L	4G63	F4A22-2-MPD1	MD996312
90-06.2 - 92-06.3	Eclipse (50G)	D22A	MRPFL4M	2.0L	4G63T	F4A33-1-UP61	MD996357
92-07.1 - 94-05.1	Eclipse (50G)	D22A	MRPFL4M	2.0L	4G63T	F4A33-1-UP63	MD971610

Connector Pinout

1991-1992 (F4A22[2])

TCU side/ATSG numbering/Facing the back of the TCU

Con A					Con B									Con C
101	102	103	104	105	1	2	3	4	5	6	7	8	9	51	52	53	54	55	56	57
106	107	108	109	110	10	11	12	13	14	15	16	17	18	58	59	60	61	62	63	64

TCU side/PCB Numbering/Facing the back of the TCU

Con A					Con B									Con C
A1	A2	A3	A4	A5	B1	B2	B3	B4	B5	B6	B7	B8	B9	C1	C2	C3	C4	C5	C6	C7
A6	A7	A8	A9	A10	B10	B11	B12	B13	B14	B15	B16	B17	B18	C8	C9	C10	C11	C12	C13	C14

ATSG #	PCB #	ATSG Desc.	Circuit	Signal
101	A1	Torque converter clutch solenoid
102	A2	Shift control solenoid valve A
103	A3	-
104	A4	Power source	Main Power (connected to A9)	12V
105	A5	Ground	GND (connected to A10, B1 and C12)	GND
106	A6	Pressure control solenoid valve
107	A7	Shift control solenoid valve B
108	A8	Engine communication signal
109	A9	Power source	Main Power (connected to A4)	12V
110	A10	Ground	GND (connected to A5, B1 and C12)	GND
1	B1	Ground	GND (connected to A5, A10 and C12)	GND
2	B2	-
3	B3	Accelerator switch	Pull-up to 12V	0v -or- 12v
4	B4	-
5	B5	On-board diagnostic output
6	B6	Air conditioning compressor clutch relay signal
7	B7	Engine communication signal	Not connected??
8	B8	Diagnostic test mode control terminal
9	B9	Engine communication signal
10	B10	Power source (backup)	microprocessor battery backed RAM	12v
11	B11	Kickdown servo switch
12	B12	Closed throttle position switch		0v -or- 12v
13	B13	-
14	B14	Oil temperature sensor (Low temperature side)
15	B15	Oil temperature sensor (High temperature side)
16	B16	Throttle position sensor
17	B17	Sensor ground	MPU reference ground	GND
18	B18	Vehicle-speed reed switch
51	C1	Park/neutral position switch(P/NPS) - "P" Park position
52	C2	P/NPS - "R" Reverse position
53	C3	P/NPS - "N" Neutral position
54	C4	P/NPS - "D" Drive position
55	C5	P/NPS - "2" Second position
56	C6	P/NPS - "L" Low position
57	C7	Overdrive switch		0v -or- 12v
58	C8	Pulse generator B
59	C9	Pulse generator B
60	C10	Pulse generator A
61	C11	Pulse generator A
62	C12	Ground	GND (connected to A5, A10, and B1)	GND
63	C13	Ignition pulse
64	C14	Power mode signal		0v -or- 12v