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	-	-	Not Available
2	0.35 PU	420	Cruise Control Release Signal
3	-	-	Not Available
4	0.35 GY/BK	1694	4WD Low Signal
5-6	-	-	Not Available
7	0.5 L-BU	20	Stop Lamp Control
8	-	-	Not Available
9	0.35 BK	2759	Low Reference
10-11	-	-	Not Available
12	0.35 BN/WH	419	MIL Control
13	0.35 D-GN/WH	465	Fuel Pump Relay Control
14	-	-	Not Available
15	0.35 PU	1807	Class 2 Serial Data
16	0.35 PU	1807	Class 2 Serial Data
17	-	-	Not Available
18	0.5 BN	4	Ignition Voltage
19	0.35 PK	639	Ignition Voltage
20	0.35 OG	440	Battery Positive Voltage
21-25	-	-	Not Available
26	0.35 YE/BK	625	Starter Enable Relay Control
27-28	-	-	Not Available
29	0.35 GY	1884	Cruise Control Switch Signal
30-32	-	-	Not Available
33	0.35 WH/BK	1164	5-Volt Reference 2
34	0.35 GY	2709	5-Volt Reference 1
35	0.35 TN	1274	5-Volt Reference 1
36	0.35 BN	1271	Low Reference
37	0.35 PU	1272	Low Reference
38	-	-	Not Available
39	0.35 D-GN/WH	817	Vehicle Speed Signal
40	0.35 WH/BK	5991	Powertrain Relay Control
41-43	-	-	Not Available
44	0.35 PU	1589	Fuel Level Sensor Signal
45-46	-	-	Not Available
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	-	-	Not Available
51	0.35 PU	421	AIR Solenoid Relay Control
52	-	-	Not Available
53	0.35 D-GN/WH	459	A/C Compressor Clutch Relay Control
54	-	-	Not Available
55	0.5 WH	1310	EVAP Canister Vent Solenoid Control
56-73	-	-	Not Available

Connector Part Information

Terminal Part Information