Engine Control Module (ECM) Connector End View C2

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

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) C2 Connector Parts Information

Connector Part Information

OEM: 34566-0103
Service: 88988931
Description: 73-Way F (BK)

Terminal Part Information

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

Pins: 13, 28, 45, 65
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72, 11, 12
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72 - J/J
Core/Insulation Crimp: Pins 11, 12 - 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	2121	IC 1 Control
2	TN/WH	3111	HO2S Low Signal (Bank 1 Sensor 1)
3	PU/WH	3110	HO2S High Signal (Bank 1 Sensor 1)
4	PU	3120	HO2S High Signal (Bank 1 Sensor 2)
5	TN/WH	3121	HO2S Low Signal (Bank 1 Sensor 2)
6	L-BU	1876	Knock Sensor 2 Signal
7	GY	2303	Knock Sensor 2 Signal
8	D-BU	496	Knock Sensor 1 Signal
9	GY	1716	Knock Sensor 1 Signal
10	-	-	Not Used
11	YE	581	TAC Motor Control - 1
12	BN	582	TAC Motor Control - 2
13	PK/BK	5290	Ignition 1 Voltage
14	PK/BK	6395	Camshaft Position (CMP) Actuator Solenoid - Intake Bank 1 Control
15	TN/BK	6397	Camshaft Position (CMP) Actuator Solenoid - Intake Bank 2 Control
16	D-BU/WH	878	Fuel Injector 8 Control
17	OG/WH	2122	IC 2 Control
18	L-BU/WH	2126	IC 6 Control
19	BN/WH	2130	Low Reference
20	PU	6267	Low Reference
21	TN	6268	Low Reference
22	WH	6269	Low Reference
23	BN	6266	Low Reference
24	BK	2755	Low Reference
25	D-GN	7125	Super Charger Inlet Air Pressure Sensor Return
26	-	-	Not Used
27	GY/BK	6272	Low Reference
28	PK/BK	5290	Ignition 1 Voltage
29	TN	2752	Low Reference
30	BN/WH	6754	Low Reference
31	D-BU/WH	6756	Low Reference
32	PK/BK	1746	Fuel Injector 3 Control
33	OG	2127	IC 7 Control
34	D-GN	2125	IC 5 Control
35	BN	2129	Low Reference
36	D-GN	6457	5-Volt Reference
37	OG	6260	5-Volt Reference
38	PK	6261	5-Volt Reference
39	D-GN	6259	5-Volt Reference
40	GY	2705	5-Volt Reference
41	YE/BK	7124	5-Volt Reference
42	TN	2760	Low Reference
43	PU/WH	6270	5-Volt Reference
44	GY	2701	5-Volt Reference
45	BN	6273	Oil Temperature Sensor Low Reference
46	BN	6753	Low Reference
47	D-BU	6755	Low Reference
48	L-GN/BK	1745	Fuel Injector 2 Control
49	TN/WH	845	Fuel Injector 5 Control
50	WH/BK	6396	Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 1 Control
51	GY/BK	6394	Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 2 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 5 Control
56	D-GN/WH	6264	Camshaft Position (CMP) Sensor - Exhaust Bank 1 Signal
57	OG/BK	6263	Camshaft Position (CMP) Sensor - Intake Bank 2 Signal
58	PK/BK	6262	Camshaft Position (CMP) Sensor - Exhaust Bank 2 Signal
59	D-BU/WH	6265	Camshaft Position (CMP) Sensor - Intake Bank 1 Signal
60	TN/WH	331	Oil Pressure Sensor Signal
61	-	-	Not Used
62	TN	472	IAT Sensor Signal
63	WH/BK	6271	CKP Sensor Signal
64	D-GN	485	TP Sensor 1 Signal
65	D-GN/WH	357	TCC Release Switch Signal
66	PU	486	TP Sensor 2 Signal
67	YE	492	MAF Sensor Signal
68	GY/WH	3113	HO2S Heater Low Control (Bank 1 Sensor 1)
69	GY/WH	3122	HO2S Heater Low Control (Bank 2 Sensor 1)
70	YE/BK	846	Fuel Injector 6 Control
71	OG/BK	877	Fuel Injector 7 Control
72	TN	1744	Fuel Injector 1 Control
73	BK/WH	1551	Ground