Engine Control Module (ECM) Connector End View C2

Fig 1: Engine Control Module (ECM) C2 Connector End Views

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) C2 Connector & Terminal Parts Information

Connector Part Information

OEM: 34566-2903
Service: See Catalog
Description: 73-Way F (BK)

Terminal Part Information

Pins: 24
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Pins: 73
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: 2/5
Release Tool/Test Probe: 12094430/J-35616-35 (VT)

Pins: 1, 2, 3, 4, 5, 6, 7, 8, 9, 16, 17, 18, 19, 23, 25, 27, 29, 31, 32, 33, 34, 35, 39, 41, 42, 43, 44, 48, 49, 51, 52, 53, 54, 55, 59, 61, 62, 63, 64, 66, 67, 70, 71, 72, 11, 12, 13, 68, 69
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 16, 17, 18, 19, 23, 25, 27, 29, 31, 32, 33, 34, 35, 39, 41, 42, 43, 44, 48, 49, 51, 52, 53, 54, 55, 59, 61, 62, 63, 64, 66, 67, 70, 71, 72 - J/J
Core/Insulation Crimp: Pins 11, 12, 13, 68, 69 - K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) C2 Connector End View

Pin	Wire Color	Circuit No.	Function
1	PU/BK	2121	IC 1 Control
2	TN/OG	3111	HO2S Low Reference Bank 2 Sensor 1
3	D-GN	3110	HO2S Reference Voltage Bank 2 Sensor 1
4	PK/OG	3120	HO2S 2 High Signal
5	TN/PK	3121	HO2S 2 Low Signal
6	PK/YE	1876	Knock Sensor 2 Signal
7	GY	2303	Knock Sensor 2 Signal
8	D-BU	496	Knock Sensor 1 Signal
9	WH/GY	1716	Knock Sensor 1 Signal
10	-	-	Not Used
11	YE	581	TAC Motor Control - 1
12	OG/PK	582	TAC Motor Control - 2
13	PK/BK	5290	Ignition 1 Voltage
14-15	-	-	Not Used
16	RD/BK	878	Fuel Injector 8 Control
17	RD/WH	2122	IC 2 Control
18	L-BU/WH	2126	IC 6 Control
19	BN/WH	2130	Low Reference
20-22	-	-	Not Used
23	BN	6266	Low Reference
24	-	-	Not Used
25	TN/D-GN	2753	Low Reference
26	-	-	Not Used
27	GY/BK	6272	Low Reference
28	-	-	Not Used
29	RD/YE	2752	Low Reference
30	-	-	Not Used
31	GY	435	EGR Solenoid Low Control
32	PK	1746	Fuel Injector 3 Control
33	OG	2127	IC 7 Control
34	D-GN	2125	IC 5 Control
35	BN	2129	Low Reference
36-38	-	-	Not Used
39	PK/WH	6259	5-Volt Reference 2
40	-	-	Not Used
41	PK/TN	2702	5-Volt Reference
42	TN/D-BU	2760	Low Reference
43	RD/GY	6270	CKP Sensor 5-Volt Reference
44	PK/RD	2701	5-Volt Reference 2
45-47	-	-	Not Used
48	L-GN/BK	1745	Fuel Injector 2 Control
49	TN/WH	845	Fuel Injector 5 Control
50	-	-	Not Used
51	RD/L-BU	1676	EGR Solenoid High Control
52	L-BU/BK	844	Fuel Injector 4 Control
53	L-BU	2123	IC 3 Control
54	D-GN/WH	2124	IC 4 Control
55	PU/WH	2128	IC 8 Control
56-58	-	-	Not Used
59	D-BU/WH	6265	CMP Sensor Signal
60	-	-	Not Used
61	L-GN/RD	1456	EGR Valve Position Signal
62	TN	472	IAT Sensor Signal
63	WH/BK	6271	CKP Sensor Signal
64	D-GN	485	TP Sensor 1 Signal
65	-	-	Not Used
66	PU	486	TP Sensor 2 Signal
67	TN/YE	492	MAF Sensor Signal
68	WH	3113	HO2S Heater Low Control Bank 2 Sensor 1
69	GY/WH	3122	HO2S 2 Heater Low Control
70	YE/BK	846	Fuel Injector 6 Control
71	RD/BK	877	Fuel Injector 7 Control
72	TN/BK	1744	Fuel Injector 1 Control
73	BK/WH	1551	Ground