Engine Control Module (ECM) X1 (LY7)

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Control Module (ECM) X1 (LY7) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.5 TN	407	Knock Sensor 2 Signal
2	-	-	Not Used
3	0.5 L-GN	5278	HO2S Input Pump Current Sensor 1
4	0.5 OG	5275	CMP Sensor Signal - Intake Bank 1
5	0.75 GY	605	5-Volt Reference 1
6	-	-	Not Used
7	0.75 TN	470	Low Reference
8	0.5 PU	486	TP Sensor 2 Signal
9	0.5 D-GN/WH	2124	Ignition Control 4
10	0.5 WH/BK	5039	CKP Sensor Signal
11	-	-	Not Used
12	0.75 OG/BK	5272	CMP Actuator Solenoid Control - Intake Bank 2
13	0.75 L-GN	5282	CMP Actuator Solenoid Control - Exhaust Bank 1
14	-	-	Not Used
15	0.75 BN	582	TAC Motor Control - 2
16	0.75 GY/WH	3113	HO2S Heater Low Control Sensor 1
17	0.5 GY	1716	Knock Sensor 1 Signal
18	-	-	Not Used
19	0.5 PU/WH	1665	HO2S High Signal
20	0.5 D-GN	5273	CMP Sensor Signal - Exhaust Bank 1
21	0.5 GY	23	Generator Field Duty Cycle Signal
22	-	-	Not Used
23	0.5 YE	410	ECT Sensor Signal
24	-	-	Not Used
25	0.5 L-BU/WH	2126	Ignition Control 6
26	0.5 OG/WH	2122	Ignition Control 2
27-28	-	-	Not Used
29	0.75 PU	5284	Actuator Solenoid Control - Intake Bank 1
30	0.75 WH/BK	5283	Actuator Solenoid Control - Exhaust Bank 2
31	0.75 YE	581	TAC Motor Control - 1
32	-	-	Not Used
33	0.5 D-BU	496	Knock Sensor 1 Signal
34	-	-	Not Used
35	0.5 WH	5279	HO2S Pump Current
36	0.5 PU	5274	CMP Sensor Signal - Exhaust Bank 2
37-38	-	-	Not Used
39	0.5 TN	2752	Low Reference
40	0.5 TN/BK	231	Engine Oil Pressure Switch Signal
41	0.5 D-GN	2125	Ignition Control 5
41	0.5 PU	2121	Ignition Control 1
43	0.5 OG	225	Generator Turn On Signal
44	-	-	Not Used
45	0.75 L-BU/BK	844	Fuel Injector 4 Control
46	0.75 PK/BK	1746	Fuel Injector 3 Control
47	0.75 TN/WH	845	Fuel Injector 5 Control
48	0.35 D-GN/WH	428	EVAP Canister Purge Solenoid Valve Control
49	0.5 GY/BK	1798	Ground
50	0.5 L-BU	1876	Knock Sensor 2 Signal
51	-	-	Not Used
52	0.5 TN	1664	HO2S Low Signal
53	0.5 YE	5276	CMP Sensor Signal Intake Bank 2
54	0.5 GY	2701	5-Volt Reference
55	0.5 D-GN	485	TP Sensor 1 Signal
56	0.5 L-GN/BK	5266	MAP Sensor Signal
57	0.75 GY	705	5-Volt Reference 2
58	0.5 L-BU	2123	Ignition Control 3
59	0.5 PU/WH	5024	Low Reference
60-61	-	-	Not Used
62	0.75 L-GN/BK	1745	Fuel Injector 2 Control
63	0.75 TN	1744	Fuel Injector 1 Control
64	0.75 YE/BK	846	Fuel Injector 6 Control

Connector Part Information

OEM: 1 928 403 379
Service: See Catalog
Description: 64-Way F (BK)

Terminal Part Information

Pins: 1, 3-5, 7-10, 12, 13, 15-17, 19-21, 23, 25, 26, 29-31, 33, 35-43, 45-50, 52-59, 62-64
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit