Engine Control Module (ECM) X1 (LY7)

Fig 1: Engine Control Module (ECM) X1 (LY7)

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-6	-	-	Not Used
7	0.5 WH	17	Stop Lamp Switch Signal or Stop Lamp Supply Voltage
8	-	-	Not Used
9	0.5 BN/WH	6281	Fuel Level Sensor Low Reference
10-11	-	-	Not Used
12	0.5 BN/WH	419	MIL Control
13	0.5 D-GN/WH	465	Fuel Pump Relay Control - Primary
14-17	-	-	Not Used
18	0.5 D-BU	5985	Accessory Wakeup Serial Data
19	0.5 PK	639	Ignition 1 Voltage
20	0.5 RD/WH	40	Battery Positive Voltage
21-25	-	-	Not Used
26	0.5 PU/WH	6386	Starter Enable Relay Control
27-32	-	-	Not Used
33	0.5 WH/BK	1164	5-Volt Reference
34	0.5 BN/WH	6283	Fuel Tank Vapor Pressure Sensor Supply Voltage
35	0.5 TN	1274	5-Volt Reference
36	0.5 BN	1271	Low Reference
37	0.5 PU	1272	Low Reference
38-39	-	-	Not Used
40	0.5 YE	5991	Powertrain Relay Coil Control
41-43	-	-	Not Used
44	0.5 D-BU	1936	Fuel Level Sensor Signal - Secondary
45	0.5 L-BU	1937	Secondary Fuel Level Sensor Signal
46	-	-	Not Used
47	0.5 D-BU	1161	APP Sensor 1 Signal
48	0.5 D-GN	890	Fuel Tank Pressure Sensor Signal
49	0.5 L-BU	1162	APP Sensor 2 Signal
50-52	-	-	Not Used
53	0.5 D-GN/WH	459	A/C Compressor Clutch Relay Control
54	0.5 D-BU	473	High Speed Cooling Fan Relay Control
55	0.5 WH	1310	EVAP Canister Vent Solenoid Control
56	-	-	Not Used

Connector Part Information

Terminal Part Information