Engine Control Module (ECM) X1

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

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-6	-	-	Not Used
7	0.5 L-GN	526	Stop Lamp Supply Voltage
8	-	-	Not Used
9	0.35 TN	2759	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	-	-	Not Used
15	0.35 D-GN	1049	Class 2 Serial Data
16-17	-	-	Not Used
18	0.35 BN	1141	Accessory Voltage
19	0.35 PK	439	Ignition Voltage
20	0.8 RD/WH	540	Battery Positive Voltage
21-28	-	-	Not Used
29	0.35 GY	1884	Cruise Control Switch Signal
30-32	-	-	Not Used
33	0.35 WH/BK	1164	5-Volt Reference
34	0.35 GY	2709	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	0.5 D-GN	389	Vehicle Speed Signal
40	0.35 BN	5069	Powertrain 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	0.35 YE/BK	625	Starter Enable Relay Control

Connector Part Information

Terminal Part Information