Engine Control Module (ECM) X1 (LS4)

Fig 1: ngine Control Module (ECM) X1 (LS4) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-6	-	-	Not Used
7	0.5 WH	17	Stop Lamp Switch Signal
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
14-17	-	-	Not Used
18	0.35 D-BU	5985	Accessory Wake Up Serial Data
19	0.35 PK	439	Ignition 1 Voltage
20	0.5 RD/WH	540	Battery Positive Voltage
21-25	-	-	Not Used
26	0.35 YE	447	Starter Relay Coil Control
27-30	-	-	Not Used
31	0.35 YE/BK	6032	Low Reference
32	0.35 GY	6031	5-Volt Reference 2
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
38-39	-	-	Not Used
40	0.35 BN	5069	PWR/TRN Relay Control
41-43	-	-	Not Used
44	0.35 PU	30	Fuel Level Sensor Signal
45	-	-	Not Used
46	0.35 OG	6030	Brake Booster Vacuum Signal
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

Terminal Part Information