Engine Control Module (ECM) X2 (LLT)

WARNING: This page is about a different car, the 2009 Saturn Outlook, 2009 GMC Acadia, 2009 Chevrolet Traverse, and 2009 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Control Module (ECM) X2 (LLT) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	2 BK/WH	451	Ground
2	2 BK/WH	451	Ground
3	1 PK/BK	5290	Ignition Voltage
4	2 BK/WH	451	Ground
5	1 PK/BK	5290	Ignition Voltage
6	1 PK/BK	5290	Ignition Voltage
7	0.5 GY/WH	3122	HO2S Heater Low Control Bank 2 Sensor 1
8	-	-	Not Used
9	0.5 TN	2759	Low Reference
10	0.5 D-GN/WH	465	Fuel Pump Relay Control
11	0.5 TN	5514	Low Reference
12	-	-	Not Used
13	0.5 YE	492	MAF Sensor Signal
14	0.5 GY	2709	5-Volt Reference
15	0.5 D-BU	1161	APP Sensor 1 Signal
16	-	-	Not Used
17	0.5 OG/BK	1786	Park/Neutral Signal
18	-	-	Not Used
19	0.5 WH	1310	EVAP Canister Vent Solenoid Control
20	0.5 OG/WH	3223	HO2S Heater Low Control (Bank 2 Sensor 2)
21	-	-	Not Used
22	0.5 TN	2760	Low Reference
23	0.5 TN/WH	3121	HO2S Low Signal (Bank 1 Sensor 2)
24	0.5 TN	3221	HO2S Low Signal (Bank 2 Sensor 2)
25	0.5 L-BU	1162	APP Sensor 2 Signal
26	-	-	Not Used
27	0.5 D-GN	890	Fuel Tank Pressure Sensor Signal
28-33	-	-	Not Used
34	0.5 BN	1271	Low Reference
35	0.5 GY	2700	5-Volt Reference 3
36	0.5 PU	1589	Fuel Level Sensor Signal
37	-	-	Not Used
38	0.5 PU	3120	HO2S High Signal (Bank 1 Sensor 2)
39	0.5 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
40	-	-	Not Used
41	0.5 D-BU	5985	Accessory Wakeup Serial Data
42	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus+
43	-	-	Not Used
44	0.5 D-GN/WH	459	A/C Compressor Clutch Relay Control
45	0.5 D-BU	473	High Speed Cooling Fan Relay Control
46	0.5 D-GN	335	Low Speed Cooling Fan Relay Control
47	0.5 PU	1272	Low Reference
48	0.5 TN	1274	5-Volt Reference 3
49	0.5 WH/BK	1164	5-Volt Reference 2
50	0.5 L-BU	6289	Induction Air Temperature Sensor Signal
51	0.5 PU	3220	HO2S High Signal (Bank 2 Sensor 2)
52	0.5 WH	17	Stop Lamp Switch Signal
53	-	-	Not Used
54	0.5 PK	439	Ignition Voltage
55	0.5 TN	2501	High Speed GMLAN Serial Data Bus-
56	0.5 RD/WH	540	Battery Positive Voltage
57	0.5 YE	447	Starter Relay Coil Control
58	0.5 YE	5991	Main Relay Control

Connector Part Information

OEM: 1928404916
Service: 19115599
Description: 58-Way F 2.8 Series Sealed (BK)

Terminal Part Information

Pins: 1-6
Terminal/Tray: 1928498058/8
Core/Insulation Crimp: E/1
Release Tool/Test Probe: J-38125-561/J-35616-35 (VT)

Pins: 7, 9-11, 13-15, 17-27, 34-39, 41-52, 54-58
Terminal/Tray: 1928498135/19
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)