Engine Control Module (ECM) X2 (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) X2 (LY7) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.5 PK	39	Ignition 1 Voltage
2	0.8 BK/WH	3122	HO2S Heater Low Control Sensor 2
3	0.5 PK	439	Ignition 1 Voltage
4	0.5 D-BU	473	High Speed Cooling Fan Relay Control
5	0.35 WH	121	Engine Speed Signal
6	-	-	Not Used
7	0.5 WH/BK	1164	5-Volt Reference 2
8	0.5 PU	1272	Low Reference
9	0.5 RD/BK	380	A/C Refrigerant Pressure Sensor Signal
10	0.5 WH	17	Stop Lamp Switch Signal
11	0.5 TN	472	IAT Sensor Signal
12	0.5 D-GN	890	Fuel Tank Pressure Sensor Signal
13-14	-	-	Not Used
15	0.35 OG/BK	463	Requested Torque Signal
16	-	-	Not Used
17	0.5 PK	39	Ignition 1 Voltage
18	-	-	Not Used
19	0.35 D-GN/WH	465	Fuel Pump Relay Control
20	0.5 D-GN	335	Low Speed Cooling Fan Relay Control
21	-	-	Not Used
22	0.5 D-GN	389	Vehicle Speed Signal
23	0.5 D-BU	6105	High Speed GMLAN Serial Data Bus +
24	0.5 BN	5069	Main Relay Control
25	0.5 BK	2759	Low Reference
26	0.5 BK	2760	Low Reference
27-28	-	-	Not Used
29	0.5 PU	3120	HO2S High Signal
30-31	-	-	Not Used
32	0.5 OG/BK	1786	Park/Neutral Signal
33	0.8 WH	1310	EVAP Canister Vent Solenoid Control
34	-	-	Not Used
35	0.5 YE/BK	625	Starter Enable Relay Control
36	0.5 OG	540	Battery Positive Voltage
37	0.35 TN/BK	464	Delivered Torque Signal
38	-	-	Not Used
39	0.5 GY	2709	5-Volt Reference 2
40	0.5 BN	1271	Low Reference
41	-	-	Not Used
42	0.5 PU	1589	Fuel Level Sensor Signal
43	0.5 YE	492	MAF Sensor Signal
44	0.5 L-BU	1162	APP Sensor 2 Signal
45-47	-	-	Not Used
48	0.5 D-GN	1049	ECM Class 2 Serial Data
49	0.5 D-GN/WH	459	A/C Compressor Clutch Relay Control
50	0.5 BN/WH	419	MIL Control
51-54	-	-	Not Used
55	0.5 L-BU	6106	High Speed GMLAN Serial Data Bus -
56	0.5 TN	1274	5-Volt Reference 1
57	0.5 TN/WH	3121	HO2S Low Signal
58	0.5 BN	1141	Ignition 3 Voltage
59	0.5 GY	1884	Cruise Control Set/Coast and Resume/Accelerate Switch Signal
60	0.5 D-BU	1161	APP Sensor 1 Signal
61-64	-	-	Not Used

Connector Part Information

OEM: 1 928 403 514
Service: See Catalog
Description: 64-Way F (BK)

Terminal Part Information

Pins: 1- 5, 7-12, 15, 17, 19, 20, 22-26, 29, 32, 33, 35- 37, 39, 40, 42-44, 48-50, 55-60
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit