Engine Control Module (ECM) X2 (LY7/LP1)

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

Fig 1: Engine Control Module (ECM) X2 (LY7/LP1) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.75 BK/WH	1551	Ground
2	0.75 BK/WH	1551	Ground
3	0.8 PK/BK	5290	Ignition 1 Voltage
4	0.75 BK/WH	1551	Ground
5	0.8 PK/BK	5290	Ignition 1 Voltage
6	0.8 PK/BK	5290	Ignition 1 Voltage
7	0.75 RD/WH	3122	HO2S Heater Low Control Bank 2 Sensor 1
8	-	-	Not Used
9	0.5 GY/BN	7345	Manual Transmission Clutch Position Sensor Low Reference
10	0.5 D-GN/WH	465	Fuel Pump Relay Control
11	0.5 TN	5514	Low Reference
12	0.5 BN/WH	419	MIL Control
13	0.5 YE	492	MAF Sensor Signal
14	0.5 BU/YE	7346	Manual Transmission Clutch Position Sensor Volt Reference
15	0.5 D-BU	1161	APP Sensor 1 Signal
16	-	-	Not Used
17	0.5 OG/BK	1786	Park/Neutral Signal, Ignition Lock Cylinder Control Actuator Signal
18	0.35 L-GN	5007	Backup Lamp Switch Signal
19	0.75 WH	1310	EVAP Canister Vent Solenoid Control
20	0.8 RD/WH	3223	HO2S Heater Low Control (Bank 2 Sensor 2)
21	-	-	Not Used
22	0.5 BK	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	0.5 L-BU	1937	Secondary Fuel Level Sensor Signal
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
36	0.5 D-BU	1936	Fuel Level Sensor Signal - Secondary
37	0.5 TN	6338	Manual Transmission Clutch Position Sensor Signal Position
38	0.5 PU	3120	HO2S High Signal (Bank 1 Sensor 2)
39	0.5 RD/BK	380	Mode Door Control
40	-	-	Not Used
41	0.5 D-BU	5985	Accessory Wakeup Serial Data
42	0.5 TN/WH	2500	High Speed GMLAN Serial Data Bus+
43	0.5 PU/WH	821	VSS High Signal
44	0.5 D-GN/WH	459	Right Rear Passenger Heated Seat Back Element Control
45	0.5 D-BU	473	Folding Seat Rotation Position Sensor Signal
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
49	0.5 WH/BK	1164	5-Volt Reference
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 or Stop Lamp Supply Voltage
53	-	-	Not Used
54	0.5 PK	339	Ignition 1 Voltage
55	0.5 TN	2501	High Speed GMLAN Serial Data Bus-
56	0.5 OG	340	Battery Positive Voltage
57	0.5 YE	447	Starter Relay Coil Control
58	0.5 BN	5069	Main Relay Control

Connector Part Information

OEM: 1-928-404-780
Service: See Catalog
Description: 58-Way F (BK)

Terminal Part Information

Pins: 1, 2, 4
Terminal/Tray: 1928498058/8
Core/Insulation Crimp: E/1
Release Tool/Test Probe: J-38125-561/J-35616-35 (VT)

Pins: 7, 9, 14, 15, 18, 20, 23-25, 34, 37, 38, 42, 43, 47-49, 51, 55
Terminal/Tray: 1928498135/19
Core/Insulation Crimp: Pins 7, 9, 14, 15, 20, 23-25, 34, 37, 38, 42, 43, 47-49, 51, 55 - J/J
Core/Insulation Crimp: Pins 18 - See Terminal Repair Kit
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)