Engine Control Module (ECM) X2 (LLT)

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

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) X2 (LLT)

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)