Engine Control Module (ECM) X1 (LLT)

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

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

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.75 GN	5282	Camshaft Phaser Exhaust Solenoid (1)
2	0.75 PU	5284	Camshaft Position (CMP) Actuator Solenoid - Intake Bank 1
3	0.35 PU/WH	4906	Fuel Injector 6 Control
4	0.35 PU	4806	Low Reference
5	0.35 YE	7301	High Pressure Fuel Pump Actuator Solenoid Control
6	0.75 D-GN/WH	428	EVAP Canister Purge Solenoid Control
7	0.35 OG	5275	Camshaft Position (CMP) Sensor - Intake Bank 1 Signal
8	-	-	Not Used
9	0.35 PU	5274	Camshaft Position Exhaust Sensor (2)
10	0.5 OG	225	Generator Turn On Signal
11-13	-	-	Not Used
14	0.35 GY	5127	Afterboil Coolant Pump Supply Voltage
15	0.5 GY	705	5-Volt Reference
16-17	-	-	Not Used
18	0.35 BN	7448	Vacuum Pump Relay Control
19-23	-	-	Not Used
24	0.75 YE	581	TAC Motor Control - 1
25	0.75 WH/BK	5283	Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 2
26	0.35 D-GN	4803	Low Reference
27	0.35 D-GN/WH	4903	Fuel Injector 3 Control
28	0.35 L-GN	4805	Low Reference
29	0.35 L-GN/WH	4905	Fuel Injector 5 Control
30	0.35 GY	23	Generator Field Duty Cycle Signal
31-32	-	-	Not Used
33	0.35 YE	5276	Camshaft Position (CMP) Sensor - Intake Bank 2 Signal
34	D-GN	5273	Camshaft Position Exhaust Sensor (1)
35	0.35 YE	573	CKP Sensor (1) Signal
36	0.35 YE	2918	Fuel Rail Pressure Sensor Signal
37	-	-	Not Used
38	0.35 GY	598	5-Volt Reference
39	0.5 GY	2701	5-Volt Reference
40	0.5 GY	596	5-Volt Reference
41	0.5 TN	552	Low Reference
42	0.35 TN	808	Low Reference
43	0.5 TN	470	Low Reference
44	0.35 TN	476	Low Reference
45	0.75 GY		5-Volt Reference
46	0.35 TN	452	Low Reference
47	-	-	Not Used
48	0.75 BN	582	TAC Motor Control - 2
49	0.75 OG/BK	5272	Camshaft Position (CMP) Sensor - Intake Bank 1 Signal
50	L-BU	4804	Low Reference
51	0.35 BN	4801	Low Reference
52	D-BU	4802	Low Reference
53	D-BU/WH	4902	Fuel Injector 2 Control
54	0.35 BN	818	Vehicle Speed Signal
55	0.8 PU	2121	IC 1 Control
56	0.8 L-BU	2123	IC 3 Control
57	0.8 D-GN	2125	IC 5 Control
58	-	-	Not Used
59	0.8 D-BU	496	Knock Sensor (1) Signal
60	0.5 GY	2303	Low Reference
61	0.5 TN/WH	331	Oil Pressure Sensor Signal
62-66	-	-	Not Used
67	0.5 TN/WH	3111	HO2S Low Reference (Bank 1 Sensor 1)
68-69	-	-	Not Used
70	0.5 PU/WH	3210	HO2S Reference Voltage (Bank 2 Sensor 1)
71	-	-	Not Used
72	0.5 GN	3212	HO2S Heater Low Control (Bank 2 Sensor 1)
73	0.35 PU	7300	Low Reference
74	0.35 L-BU/WH	4904	Fuel Injector 4 Control
75	0.35 BN/WH	4901	Fuel Injector 1 Control
76	0.8 PK/BK	5291	Ignition 1 Voltage
77	0.8 PK/BK	5292	Ignition 1 Voltage
78	-	-	Not Used
79	0.8 OG/WH	2122	IC 2 Control
80	0.5 D-GN/WH	2124	IC 4 Control
81	0.5 L-BU/WH	2126	IC 6 Control
82	0.5 YE	410	ECT Sensor Signal
83	0.5 GY	1716	Knock Sensor 1 Signal
84	0.5 L-BU	1876	Knock Sensor 2 Signal
85-87	-	-	Not Used
88	0.5 TN	2752	Low Reference
89	0.5 PU	486	TP Sensor 2 Signal
90	0.5 D-GN/WH	485	TP Sensor 1 Signal
91	-	-	Not Used
92	0.5 WH	3110	HO2S High Signal (Bank 1 Sensor 1)
93	0.5 TN/WH	3211	HO2S Low Signal (Bank 2 Sensor 1)
94-95	-	-	Not Used
96	0.5 GY/WH	3113	HO2S Heater Low Control (Bank 1 Sensor 1)

Connector Part Information

OEM: 1928404781
Service: 19149311
Description: 96-Way F 1.2 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