Transmission Control Module (TCM) Connector End View, Engine Side

Fig 1: Transmission Control Module (TCM), Engine Side Connector End View

Courtesy of GENERAL MOTORS CORP.

Transmission Control Module (TCM), Engine Side Connector & Terminal Parts Information

Connector Part Information

Transmission Control Module (TCM), Engine Side Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	TN/BK	422	Torque Converter Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Control
2	L-GN	1222	1-2 Shift Solenoid (SS) Valve Control
3	OG/BK	1230	Input Speed Sensor (ISS) High Signal
4-5	-	-	Not Used
6	TN	2501	High Speed GMLAN Serial Data Bus - (CAN)
7	TN/BK	2500	High Speed GMLAN Serial Data Bus + (CAN)
8	-	-	Not Used
9	YE	657	TCC Release Switch Signal
10	-	-	Not Used
11	BN	4	Accessory Voltage
12-15	-	-	Not Used
16	PU	401	Output Speed Sensor (OSS) Low Signal
17	L-BU/WH	1229	Pressure Control (PC) Solenoid Valve Low Control
18-19	-	-	Not Used
20	YE/BK	1223	2-3 SS Valve Control
21-22	-	-	Not Used
23	GY	773	Transmission Range Switch Signal C
24-25	-	-	Not Used
26	D-BU/WH	1231	ISS Low Signal
27-28	-	-	Not Used
29	BK/WH	771	Transmission Range Switch Signal A
30	TN	2762	Transmission Fluid Temperature (TFT) Sensor Low Reference
31	PK	1039	Ignition 1 Voltage
32	RD/WH	840	Battery Positive Voltage
33	OG	1226	Transmission Fluid Pressure (TFP) Switch Signal C
34	-	-	Not Used
35	YE/BK	1227	TFT Sensor Signal
36	-	-	Not Used
37	TN	2501	High Speed GMLAN Serial Data Bus - (CAN)
38	TN/BK	2500	High Speed GMLAN Serial Data Bus + (CAN)
39	WH	776	Transmission Range Switch Signal P
40	OG/BK	1228	PC Solenoid Valve High Control
41	YE	400	OSS High Signal
42	L-BU/WH	20	Stop Lamp Switch Signal
43	-	-	Not Used
44	D-BU	1225	TFP Switch Signal B
45	-	-	Not Used
46	YE	772	Transmission Range Switch Signal B
47-48	-	-	Not Used
49	BK/WH	451	Ground