Transmission Control Module (TCM) (LY7)

Fig 1: Transmission Control Module (TCM) (LY7) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	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
4-5	-	-	Not Used
6	0.35 D-GN	2362	High Speed GMLAN Serial Data Bus - (CAN)
7	0.35 YE	2361	High Speed GMLAN Serial Data Bus
8	-	-	Not Used
9	0.35 WH	1804	TCC Release Switch Signal
10	-	-	Not Used
11	0.35 BN	1141	Ignition 3 Voltage
12-15	-	-	Not Used
16	0.35 PU	401	Output Speed Sensor (OSS) 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 SS 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	Transmission Fluid Temperature (TFT) Sensor Low Reference
31	0.35 PK	1339	Ignition 1 Voltage
32	0.5 OG	1640	Battery Positive Voltage
33-34	-	-	Not Used
35	0.35 YE/BK	1227	TFT Sensor Signal
36	-	-	Not Used
37	0.5 L-BU	6106	High Speed GMLAN Serial Data Bus
38	0.5 D-BU	6105	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	0.35 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	1451	Ground

Connector Part Information

Terminal Part Information