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

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

Courtesy of GENERAL MOTORS CORP.

Connector Part Information

Terminal Part Information

Transmission Control Module (TCM), Engine Side terminal identification

Pin	Wire Color	Circuit No.	Function
1	BN	418	Torque Converter Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Control
2	L-GN	1222	1-2 Shift Solenoid Valve Control
3	OG/BK	1230	ISS High Signal
4-5	-	-	Not Used
6	TN	2501	High Speed GMLAN Serial Data Bus
7	TN/BK	2500	High Speed GMLAN Serial Data Bus
8	-	-	Not Used
9	WH	1804	TCC Release Switch Signal
10	PU	5526	TAP Up/TAP Down Switch Signal
11	BN	4	Ignition 3 Voltage
12-15	-	-	Not Used
16	PU	401	VSS Low Signal
17	L-BU/WH	1229	PC Solenoid Valve Low Control
18-19	-	-	Not Used
20	YE/BK	1223	2-3 Shift Solenoid Valve Control
21-22	-	-	Not Used
23	GY	773	Transmission Range Signal C
24-25	-	-	Not Used
26	D-BU/WH	1231	ISS Low Signal
27-28	-	-	Not Used
29	TN/WH	771	Transmission Range Signal A
30	TN	2762	Low Reference
31	PK	39	Ignition 1 Voltage
32	RD/WH	2040	Battery Positive Voltage
33-34	-	-	Not Used
35	YE/BK	1227	TFT Sensor Signal
36	-	-	Not Used
37	TN	2501	High Speed GMLAN Serial Data Bus
38	TN/BK	2500	High Speed GMLAN Serial Data Bus
39	WH	776	Transmission Range Signal P
40	OG/BK	1228	PC Solenoid Valve High Control
41	YE	400	VSS High Signal
42	WH	17	Stop Lamp Switch Signal
43-45	-	-	Not Used
46	YE	772	Transmission Range Signal B
47-48	-	-	Not Used
49	BK/WH	451	Ground