Transmission Control Module (TCM) (LS4)

Fig 1: Transmission Control Module (TCM) (LS4) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire Color	Circuit No.	Function
1	0.35 BN	418	Torque Converter Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Control
2	0.35 L-GN	1222	1-2 Shift Solenoid (SS) Valve Control
3	0.35 RD/BK	1230	Input Speed Sensor (ISS) High Signal
4	-	-	Not Used
5	0.5 RD	381	Vehicle Speed Signal
6	D-GN	2362	High Speed GMLAN Serial Data Bus
7	0.35 YE	2361	High Speed GMLAN Serial Data Bus
8	-	-	Not Used
9	0.35 WH	1804	TCC Release Switch Signal
10	0.35 YE	1996	Remote Shift Selector Signal
11	0.35 BN	1141	Ignition 3 Voltage
12-15	-	-	Not Used
16	0.35 PU	401	VSS Low Signal
17	0.35 L-BU/WH	1229	Pressure Control (PC) Solenoid Valve Low Control
18-19	-	-	Not Used
20	0.35 YE/BK	1223	2-3 Shift Solenoid Valve Control
21-22	-	-	Not Used
23	0.35 GY	773	Transmission Range Signal C
24-25	-	-	Not Used
26	0.35 D-BU/WH	1231	ISS Low Signal
27-28	-	-	Not Used
29	0.35 BK/WH	771	Transmission Range Signal A
30	0.35 BK	2762	Low Reference
31	0.35 PK	1339	Ignition 1 Voltage
32	0.5 OG	540	Battery Positive Voltage
33-34	-	-	Not Used
35	0.35 YE/BK	1227	TFT Sensor Signal
36	-	-	Not Used
37	0.5 TN	2501	High Speed GMLAN Serial Data Bus -
38	0.5 TN/WH	2500	High Speed GMLAN Serial Data Bus +
39	0.35 WH	776	Transmission Range Signal P
40	0.35 RD/BK	1228	PC Solenoid Valve High Control
41	0.35 YE	400	VSS High Signal
42	0.5 WH	17	Stop Lamp Switch Signal
43-45	-	-	Not Used
46	0.35 YE	772	Transmission Range Signal B
47-48	-	-	Not Used
49	3 BK/WH	251	Ground

Connector Part Information

Terminal Part Information