Powertrain Control Module (PCM) Connector End Views

WARNING: This page is about a different car, the 2004 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Powertrain Control Module (PCM) C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12191489 80-Way F Micro-Pack 100W Sealed (BU)
Pin	Wire Color	Circuit No.	Function
1	BK	750	Ground
2	L-GN	1867	12-Volt Reference
3	PK/BK	1746	Fuel Injector 3 Control
4	L-GN/BK	1745	Fuel Injector 2 Control
5-6	-	-	Not Used
7	GY	2705	5-Volt Reference A
8-10	-	-	Not Used
11	L-BU	1876	Knock Sensor 2 Signal
12	D-BU/WH	1869	CKP Sensor Signal
13	OG/BK	463	Requested Torque Signal
14	TN	800	UART Serial Data
15	D-BU/WH	774	UART Serial Data
16-18	-	-	Not Used
19	PK	239	Ignition 1 Voltage
20	RD/WH	1440	Battery Positive Voltage
21	YE/BK	1868	Low Reference
22	-	-	Not Used
23	TN	452	Low Reference
24	BK/WH	1451	Ground
25	TN	1671	HO2S Low Signal - Bank 2 Sensor 2
26	TN	1667	HO2S Low Signal - Bank 2 Sensor 1
27	BK/WH	1551	Ground
28	TN/WH	1669	HO2S Low Signal - Bank 1 Sensor 2
29	TN	1664	HO2S Low Signal - Bank 1 Sensor 1
30-34	-	-	Not Used
35	BN/WH	379	CPP Switch Signal
36	TN	1744	Fuel Injector 1 Control
37	YE/BK	846	Fuel Injector 6 Control
38	-	-	Not Used
39	YE	447	Starter Relay Coil Control
40	BK	750	Ground
41	-	-	Not Used
42	D-GN	335	Low Speed Cooling Fan Relay Control
43	OG/BK	877	Fuel Injector 7 Control
44	L-BU/BK	844	Fuel Injector 4 Control
45	GY	2700	5-Volt Reference B
46	GY	596	5-Volt Reference B
47	-	-	Not Used
48	GY	2704	5-Volt Reference A
49-50	-	-	Not Used
51	D-BU	496	Knock Sensor 1 Signal
52	-	-	Not Used
53	OG/BK	1057	Low Reference
54	OG/BK	469	Low Reference
55-56	-	-	Not Used
57	RD/WH	1440	Battery Positive Voltage
58	PU	1807	Class 2 Serial Data
59	PU	1807	Class 2 Serial Data
60	-	-	Not Used
61	PK/BK	632	Low Reference
62	GY	847	Extended Travel Brake Switch Signal
63	BK	2755	Low Reference
64	BK/WH	1451	Ground
65	PU	1670	HO2S High Signal - Bank 2 Sensor 2
66	PU	1666	HO2S High Signal - Bank 2 Sensor 1
67	BK/WH	1551	Ground
68	PU/WH	1668	HO2S High Signal - Bank 1 Sensor 2
69	PU/WH	1665	HO2S High Signal - Bank 1 Sensor 1
70	BN	1174	Oil Level Switch Signal
71-72	-	-	Not Used
73	BN/WH	633	CMP Sensor Signal
74	YE	410	ECT Sensor Signal
75	-	-	Not Used
76	TN/WH	845	Fuel Injector 5 Control
77	D-BU/WH	878	Fuel Injector 8 Control
78	-	-	Not Used
79	GY	587	Skip/Shift Solenoid Control
80	TN	2761	Low Reference

Powertrain Control Module (PCM) C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12191488 80-Way F Micro-Pack 100W Sealed (GN)
Pin	Wire Color	Circuit No.	Function
1	BK	750	Ground
2-4	-	-	Not Used
5	TN/BK	464	Delivered Torque Signal
6-8	-	-	Not Used
9	D-GN/WH	465	Fuel Pump Relay Control
10	WH	121	Engine Speed Signal
11-13	-	-	Not Used
14	OG/BK	380	A/C Refrigerant Pressure Sensor Signal
15	OG	225	Generator Turn On Signal
16-17	-	-	Not Used
18	PU/WH	1035	Starter Relay Coil Supply Voltage
19	-	-	Not Used
20	L-GN/BK	822	VSS Low Signal
21	PU/WH	821	VSS High Signal
22-24	-	-	Not Used
25	TN	472	IAT Sensor Signal
26	PU	2121	IC 1 Control
27	OG	2127	IC 7 Control
28	L-BU/WH	2126	IC 6 Control
29	D-GN/WH	2124	IC 4 Control
30	-	-	Not Used
31	YE	492	MAF Sensor Signal
32	L-GN	432	MAP Sensor Signal
33	D-BU	473	High Speed Cooling Fan Relay Control
34	D-GN/WH	428	EVAP Canister Purge Solenoid Control
35-38	-	-	Not Used
39	OG	631	12-Volt Reference
40	BK	750	Ground
41-42	-	-	Not Used
43	D-GN/WH	459	A/C Compressor Clutch Relay Control
44	L-GN	1652	Reverse Lockout Solenoid Control
45	WH	1310	EVAP Canister Vent Solenoid Control
46	BN/WH	419	MIL Control
47	WH	375	Skip Shift Indicator Control
48-49	-	-	Not Used
50	BN	818	Vehicle Speed Signal
51	YE/BK	1227	TFT Sensor Signal
52	BN	2391	HO2S Heater Low Control - Bank 1 Sensor 2
53	OG/WH	3223	HO2S Heater Low Control - Bank 2 Sensor 2
54	D-BU	1936	Fuel Level Sensor Signal - Primary
55-56	-	-	Not Used
57	TN	552	Low Reference
58	TN/WH	331	Oil Pressure Sensor Signal
59	YE	5	Crank Voltage
60	BN	2129	Low Reference
61	BN/WH	2130	Low Reference
62-63	-	-	Not Used
64	D-GN	890	Fuel Tank Pressure Sensor Signal
65	BN	5069	MAIN Relay Control
66	PU/WH	2128	IC 8 Control
67	OG/WH	2122	IC 2 Control
68	D-GN	2125	IC 5 Control
69	L-BU	2123	IC 3 Control
70-71	-	-	Not Used
72	GY/WH	3113	HO2S Heater Low Control - Bank 1 Sensor 1
73	L-BU	1937	Fuel Level Sensor Signal - Secondary
74	L-GN	3212	HO2S Heater Low Control - Bank 2 Sensor 1
75	GY	23	Generator Field Duty Cycle Signal
76-79	-	-	Not Used
80	TN	5514	Low Reference