Engine Control Module (ECM) X1 (LY7)

WARNING: This page is about a different car, the 2008 Chevrolet Malibu. 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
1-6	-	-	Not Used
7	0.35 WH	17	Stop Lamp Switch Signal or Stop Lamp Supply Voltage
8	-	-	Not Used
9	0.35 OG/BK	1057	Low Reference
10-11	-	-	Not Used
12	0.35 BN/WH	419	MIL Control
13	0.35 D-GN/WH	465	Fuel Pump Relay Control
14-17	-	-	Not Used
18	0.35 BN	4	Accessory Voltage
19	0.35 PK	639	Ignition 1 Voltage
20	0.35 RD/WH	540	Battery Positive Voltage
21-25	-	-	Not Used
26	0.35 PU/WH	6386	Starter Relay Control
27-32	-	-	Not Used
33	0.35 WH/BK	1164	5-Volt Reference
34	0.35 GY	705	5-Volt Reference
35	0.35 TN	1274	5-Volt Reference
36	0.35 BN	1271	Low Reference
37	0.35 PU	1272	Low Reference
38	-	-	Not Used
39	0.35 BN	818	Vehicle Speed Signal
40	0.35 BN	5069	Main Relay Control
41-43	-	-	Not Used
44	0.35 PU	1589	Fuel Level Sensor Signal
45-46	-	-	Not Used
47	0.35 D-BU	1161	APP Sensor 1 Signal
48	0.35 D-GN	890	Fuel Tank Pressure Sensor Signal
49	0.35 L-BU	1162	APP Sensor 2 Signal
50-52	-	-	Not Used
53	0.35 D-GN/WH	459	A/C Compressor Clutch Relay Control
54	0.35 D-BU	473	High Speed Cooling Fan Relay Control
55	0.35 WH	1310	EVAP Canister Vent Solenoid Control
56	-	-	Not Used

Connector Part Information

OEM: 13510837
Service: See Catalog
Description: 56-Way F MX123 Series (BU)

Terminal Part Information

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