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

Fig 1: TCM (Engine Side) Connector End View

Courtesy of GENERAL MOTORS CORP.

TCM (Engine Side) Connector Part Information

Connector Part Information

TCM (Engine Side) Connector 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	TN/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	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