Engine Control Module (ECM) X2

Fig 1: Engine Control Module (ECM) X2 Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	-	-	Not Used
2	0.35 L-GN	1867	5-Volt Reference 2
3	0.35 L-BU/BK	1688	5-Volt Reference 2
4	-	-	Not Used
5	0.5 BN	582	TAC Motor Control - 2
6	0.5 YE	581	TAC Motor Control - 1
7	-	-	Not Used
8	0.5 D-GN/WH	428	EVAP Canister Purge Solenoid Valve Control
9-10	-	-	Not Used
11	0.5 L-GN	1652	Reverse Lockout Solenoid Control
12	0.5 GY/WH	3113	HO2S Heater Low Control Bank 1 Sensor 1
13	0.5 L-GN	3212	HO2S Heater Low Control Bank 2 Sensor 1
14-16	-	-	Not Used
17	0.5 D-BU/WH	878	Fuel Injector 8 Control
18	0.5 TN/WH	845	Fuel Injector 5 Control
19	0.5 YE/BK	846	Fuel Injector 6 Control
20	0.5 TN	1744	Fuel Injector 1 Control
21	0.35 YE	410	ECT Sensor Signal
22	0.35 TN	2761	Low Reference
23	0.35 TN/WH	585	Transmission Fluid Temperature Sensor Signal
24	0.35 OG/BK	586	Low Reference (MM6/MZ6)
25	-	-	Not Used
26	0.35 D-BU	496	KS 1 Signal
27	0.35 GY	1716	KS 1 Signal
28	-	-	Not Used
29	0.35 L-BU	1876	KS 2 Signal
30	0.35 GY	2303	KS 2 Signal
31	-	-	Not Used
32	0.35 GY	23	Generator Field Duty Cycle Signal
33	-	-	Not Used
34	0.35 BK	2755	Low Reference
35	0.35 TN/WH	1704	Low Reference
36	-	-	Not Used
37	0.5 L-GN/BK	1745	Fuel Injector 2 Control
38	0.5 PK/BK	1746	Fuel Injector 3 Control
39	0.5 L-BU/BK	844	Fuel Injector 4 Control
40	0.5 OG/BK	877	Fuel Injector 7 Control
41	0.35 GY	2705	5-Volt Reference 1
42	-	-	Not Used
43	0.35 GY	2704	5-Volt Reference 1
44	0.35 OG	631	5-Volt Reference 1
45-49	-	-	Not Used
50	0.35 TN/WH	331	Oil Pressure Sensor Signal
51-52	-	-	Not Used
53	0.35 OG/BK	469	Low Reference
54-55	-	-	Not Used
56	0.5 TN	1664	HO2S Low Signal Bank 1 Sensor 1
57	0.5 PU/WH	1665	HO2S High Signal Bank 1 Sensor 1
58	0.35 L-GN	432	MAP Sensor Signal
59	0.5 PU	1666	HO2S High Signal Bank 2 Sensor 1
60	0.5 TN	1667	HO2S Low Signal Bank 2 Sensor 1
61	0.35 OG	225	Generator Turn On Signal
62	-	-	Not Used
63	0.35 PU	486	TP Sensor 2 Signal
64	0.35 BN/WH	633	CMP Sensor Signal
65	0.35 D-GN	485	TP Sensor 1 Signal
66	0.35 PK/BK	632	Low Reference
67	-	-	Not Used
68	0.35 D-BU/WH	1869	CKP Sensor Signal
69	0.35 YE/BK	1868	Low Reference
70	0.5 PU	2121	IC 1 Control
71	0.5 PU/WH	2128	IC 8 Control
72	0.5 OG	2127	IC 7 Control
73	0.5 OG/WH	2122	IC 2 Control
74	0.5 L-BU/WH	2126	IC 6 Control
75	0.5 D-GN	2125	IC 5 Control
76	0.5 D-GN/WH	2124	IC 4 Control
77	0.5 L-BU	2123	IC 3 Control
78	0.5 BN	2129	Low Reference
79	0.5 BN/WH	2130	Low Reference
80	-	-	Not Used

Connector Part Information

OEM: 34566-4503
Service: See Catalog
Description: 80-Way F MX123 Harness Connector Assembly (GY)

Terminal Part Information

Pins: 2, 3, 5, 6, 8, 11-13, 17-24, 26, 27, 29, 30, 32, 34, 35, 37-41, 43, 44, 50, 53, 56-60, 61, 63-66, 68-79
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: Pins 2, 3, 21-24, 26, 27, 29, 30, 32, 34, 35, 41, 43, 44, 50, 53, 58, 61, 63-66, 68, 69 - H/H
Core/Insulation Crimp: Pins 5, 6, 8, 11-13, 17-20, 37-40, 56, 57, 59, 60, 70-79 - See Terminal Repair Kit
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)