Engine Control Module (ECM) X3 (LS4)

Fig 1: Engine Control Module (ECM) X3 (LS4) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-6	-	-	Not Used
7	0.5 OG	225	Generator Turn On Signal
8-9	-	-	Not Used
10	0.5 TN	5496	Cylinder Shutoff Solenoid Control 3
11	0.5 D-BU	5491	Cylinder Shutoff Solenoid Control 1
12-17	-	-	Not Used
18	0.35 BN	1174	Oil Level Switch Signal
19-20	-	-	Not Used
21	0.35 BK/WH	2751	Low Reference
22	-	-	Not Used
23	0.5 OG/BK	469	Low Reference
24-27	-	-	Not Used
28	0.35 L-BU/BK	6297	Low Reference
29	0.5 GY	23	Generator Field Duty Cycle Signal
30-32	-	-	Not Used
33	0.5 TN	2501	High Speed GMLAN Serial Data Bus -
34	-	-	Not Used
35	0.35 TN	2761	Low Reference
36	-	-	Not Used
37	0.35 GY	2700	5-Volt Reference 1
38	-	-	Not Used
39	0.35 GY	2704	5-Volt Reference 1
40-43	-	-	Not Used
44	0.35 L-BU	6295	5-Volt Reference 2
45	-	-	Not Used
46	0.35 OG/BK	1786	Park/Neutral Signal
47	-	-	Not Used
48	0.5 D-GN/WH	428	EVAP Canister Purge Solenoid Control
49	0.35 D-GN	335	Low Speed Cooling Fan Relay Control
50-52	-	-	Not Used
53	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus +
54	-	-	Not Used
55	0.35 YE	410	ECT Sensor Signal
56	-	-	Not Used
57	0.35 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
58	-	-	Not Used
59	0.5 L-GN	432	MAP Sensor Signal
60-65	-	-	Not Used
66	0.5 OG	381	Vehicle Speed Signal
67	-	-	Not Used
68	0.5 WH	5497	Cylinder Shutoff Solenoid Control 2
69	0.5 OG	5494	Cylinder Shutoff Solenoid Control 4
70-73	-	-	Not Used

Connector Part Information

Terminal Part Information