Engine Control Module (ECM) X1 (LE5)

WARNING: This page is about a different car, the 2008 Saturn Aura. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Control Module (ECM) X1 (LE5) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.35 D-BU	1161	APP Sensor 1 Signal
2	-	-	Not Used
3	0.35 BN	4	Accessory Voltage
4	-	-	Not Used
5	0.35 D-GN	335	Low Speed Cooling Fan Relay Control
6	0.35 D-GN/WH	465	Fuel Pump Relay Control - Primary
7	-	-	Not Used
8	0.35 TN	5514	Low Reference
9-12	-	-	Not Used
13	0.35 OG/BK	5069	Main Relay Control
14-17	-	-	Not Used
18	0.35 L-BU	1162	APP Sensor 2 Signal
19	0.35 PK	639	Ignition 1 Voltage
20	0.35 RD/WH	540	Battery Positive Voltage
21	0.35 PU	1272	Low Reference
22	-	-	Not Used
23	0.35 TN	2759	Low Reference
24	0.35 OG/BK	1057	Low Reference
25	0.35 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
26	-	-	Not Used
27	0.35 BN/WH	419	MIL Control
28-29	-	-	Not Used
30	0.35 D-GN/WH	459	A/C Compressor Clutch Relay Control
31	-	-	Not Used
32	0.35 PU/WH	6386	Starter Enable Relay Control
33-36	-	-	Not Used
37	0.35 YE	492	MAF Sensor Signal
38	-	-	Not Used
39	0.35 PU	1589	Fuel Level Sensor Signal - Primary
40	-	-	Not Used
41	0.35 BN	1271	Low Reference
42	0.35 D-GN	890	Fuel Tank Pressure Sensor Signal
43	0.35 TN/WH	2500	High Speed GMLAN Serial Data Bus +
44	0.35 TN	2501	High Speed GMLAN Serial Data Bus -
45-46	-	-	Not Used
47	0.35 WH/BK	1164	5-Volt Reference
48	-	-	Not Used
49	0.35 D-BU	473	High Speed Cooling Fan Relay Control
50-54	-	-	Not Used
55	0.35 WH	17	Stop Lamp Supply Voltage
56	-	-	Not Used
57	0.35 OG/BK	1786	Ignition Lock Cylinder Control Actuator Signal
58	0.35 TN	472	IAT Sensor Signal
59-64	-	-	Not Used
65	0.35 GY	2700	5-Volt Reference
66	0.35 GY	705	5-Volt Reference
67	0.35 TN	1274	5-Volt Reference
68-69	-	-	Not Used
70	0.35 WH	1310	EVAP Canister Vent Solenoid Control
71-72	-	-	Not Used
73	0.8 PK/BK	5290	Ignition 1 Voltage

Connector Part Information

OEM: 15499466
Service: 88988931
Description: 73-Way F MX 123 Series Sealed (BK)

Terminal Part Information

Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit