Engine Control Module (ECM) C2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15460228 73-Way F Micro 64 Series (BK)
Pin	Wire Color	Circuit No.	Function
1-2	-	-	Not Used
3	D-GN	485	TP Sensor 1 Signal
4	PU	486	TP Sensor 2 Signal
5-7	-	-	Not Used
8	L-GN	432	MAP Sensor Signal
9	-	-	Not Used
10	YE	573	CKP Sensor 1 Signal
11	L-BU	1876	Knock Sensor 2 Signal
12	GY	23	Generator Field Duty Cycle Signal
13	GY	1716	Low Reference
14	L-GN	5282	CMP Actuator Solenoid Control Exhaust Bank 1
15-16	-	-	Not Used
17	TN	1744	Fuel Injector 1 Control
18	OG/BK	1745	Fuel Injector 2 Control
19	D-BU	496	Knock Sensor 1 Signal
20	L-BU/BK	1746	Fuel Injector 3 Control
21	OG/BK	877	Fuel Injector 7 Control
22	L-GN/BK	845	Fuel Injector 5 Control
23	YE/BK	846	Fuel Injector 6 Control
24	D-BU/WH	878	Fuel Injector 8 Control
25	D-GN	5273	CMP Sensor Signal Exhaust Bank 1
26	-	-	Not Used
27	BN/WH	5303	Low Reference
28	GY	2303	Low Reference
29	PU	5284	CMP Actuator Solenoid Control Intake Bank 1
30	YE/BK	844	Fuel Injector 4 Control
31	OG/BK	5272	CMP Actuator Solenoid Control Intake Bank 2
32	OG	5275	CMP Sensor Signal Intake Bank 1
33	D-BU	5300	12-Volt Reference
34	WH/BK	5283	CMP Actuator Solenoid Control Exhaust Bank 2
35	TN	5301	Low Reference
36	OG/BK	469	Low Reference
37	TN	2752	Low Reference
38	TN	2761	Low Reference
39	BN/WH	2130	Low Reference
40	L-BU	5302	12-Volt Reference
41	PU	574	Low Reference
42	BN	2129	Low Reference
43	PU	5274	CMP Sensor Signal Exhaust Bank 2
44	TN	582	TAC Motor Control - 2
45	GY	5296	Low Reference
46	L-GN	5298	12-Volt Reference
47	BN	5299	Low Reference
48	YE	581	TAC Motor Control - 1
49	YE	5276	CMP Sensor Signal Intake Bank 2
50	L-GN	1867	12-Volt Reference
51	GY	2701	5-Volt Reference
52-53	-	-	Not Used
54	YE	410	ECT Sensor Signal
55	D-GN/WH	428	EVAP Canister Purge Solenoid Control
56-57	-	-	Not Used
58	PU	2121	IC 1 Control
59	OG/WH	2122	IC 2 Control
60	OG	2127	IC 7 Control
61	L-BU	2123	IC 3 Control
62	D-GN/WH	2124	IC 4 Control
63	PU/WH	2128	IC 8 Control
64	D-GN	2125	IC 5 Control
65	GY	2704	5-Volt Reference
66-67	-	-	Not Used
68	OG	225	Generator Turn On Signal
69	L-BU/WH	2126	IC 6 Control
70	-	-	Not Used
71	YE/BK	5297	12-Volt Reference
72	-	-	Not Used
73	BK/WH	1551	Ground

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		1928403386 64-Way F Bosch (BK)
Pin	Wire Color	Circuit No.	Function
1	PK/BK	5290	Ignition 1 Voltage
2	GY/WH	3122	HO2S Heater Low Control - Bank 1 Sensor 2
3	PK	239	Ignition 1 Voltage
4	D-BU	473	High Speed Cooling Fan Relay Control
5	WH	121	Engine Speed Signal
6	-	-	Not Used
7	WH/BK	1164	5-Volt Reference A
8	PU	1272	Low Reference
9	OG/BK	380	A/C Refrigerant Pressure Sensor Signal
10	OG	5371	BAS Relay Coil Supply Voltage
11	TN	472	IAT Sensor Signal
12	D-GN	890	Fuel Tank Pressure Sensor Signal
13-14	-	-	Not Used
15	OG/BK	463	Requested Torque Signal
16	-	-	Not Used
17	PK/BK	5290	Ignition 1 Voltage
18	OG/WH	3223	HO2S Heater Low Control - Bank 2 Sensor 2
19	D-GN/WH	465	Fuel Pump Relay Control
20	D-GN	335	Low Speed Cooling Fan Relay Control
21	-	-	Not Used
22	BN	818	Vehicle Speed Signal
23	WH	2500	High Speed GMLAN Serial Data Bus+ (M82)
24	BN	5069	MAIN Relay Control
25	TN	452	Low Reference
26	TN	2760	Low Reference
27	L-BU	1937	Fuel Level Sensor Signal - Secondary
28	-	-	Not Used
29	PU/WH	1668	HO2S Signal - Bank 1 Sensor 2
30	-	-	Not Used
31	YE	5	Crank Voltage
32	OG/BK	1786	Park/Neutral Signal (M82)
33	WH	1310	EVAP Canister Vent Solenoid Control
34	-	-	Not Used
35	YE	447	Starter Relay Coil Control
36	RD/WH	1440	Battery Positive Voltage
37	TN/BK	464	Delivered Torque Signal
38	-	-	Not Used
39	GY	596	5-Volt Reference A
40	BN	1271	Low Reference
41	TN	1671	HO2S Low Reference - Bank 2 Sensor 2
42	D-BU	1936	Fuel Level Sensor Signal - Primary
43	YE	492	MAF Sensor Signal
44	L-BU	1162	APP Sensor 2 Signal
45-46	-	-	Not Used
47	YE/BK	5270	Traction Control Data Signal
48	PU	1807	Class 2 Serial Data
49	D-GN/WH	459	A/C Compressor Clutch Relay Control
50	BN/WH	419	MIL Control
51-54	-	-	Not Used
55	L-GN	2501	High Speed GMLAN Serial Data Bus- (M82)
56	TN	1274	5-Volt Reference C
57	TN/WH	1669	HO2S Low Reference - Bank 1 Sensor 2
58	YE	343	Accessory Voltage
59	GY	1884	Cruise Control Switch Signal
60	D-BU	1161	APP Sensor Signal 1
61	PU	1670	HO2S Signal - Bank 2 Sensor 2
62	-	-	Not Used
63	GY	847	Extended Travel Brake Switch Signal
64	-	-	Not Used