Engine Control Module (ECM) X2 (LY7)

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

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

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.8 BK	750	Ground
2	0.8 BK	750	Ground
3	-	-	Not Used
4	0.8 BK	750	Ground
5	1 PK/BK	5290	Ignition Voltage
6	-	-	Not Used
7	0.75 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 - Primary
11	0.5 TN	5514	Low Reference
12	0.35 BN/WH	419	MIL Control
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	0.75 WH	1310	EVAP Canister Vent Solenoid Control
20	0.75 OG/WH	3223	HO2S Heater Low Control (Bank 2 Sensor 2)
21	-	-	Not Used
22	0.5 TN	2760	Low Reference
23	0.75 TN/WH	3121	Low Reference (Bank 1 Sensor 2)
24	0.75 TN	3221	Low Reference (Bank 2 Sensor 2)
25	0.5 L-BU	1162	APP Sensor 2 Signal
26	0.5 L-BU	1937	Fuel Level Sensor Signal - Secondary
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 - Primary
37	-	-	Not Used
38	0.75 PU	3120	Reference Voltage (Bank 1 Sensor 2)
39	0.5 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
40	-	-	Not Used
41	0.35 D-BU	5985	Accessory Wakeup Serial Data
42	0.35 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
49	0.5 WH/BK	1164	5-Volt Reference
50	0.5 L-BU	6289	Induction Air Temperature Sensor Signal
51	0.75 PU	3220	Reference Voltage (Bank 2 Sensor 2)
52	0.5 WH	17	Stop Lamp Switch Signal
53	-	-	Not Used
54	0.5 PK	239	Ignition Voltage
55	0.35 TN	2501	High Speed GMLAN Serial Data Bus-
56	0.5 RD/WH	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: 1928404780
Service: 88988935
Description: 58-Way F CONN 2.8 Sealed (BK)

Terminal Part Information

Pins: 1-2, 4
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Pins: 11
Terminal/Tray: 1928498058/8
Core/Insulation Crimp: E/1
Release Tool/Test Probe: J-38125-561/J-35616- 4A (PU)

Pins: 5, 7, 9-10, 12-15, 17, 19-20, 22-27, 34-36, 38-39, 41-42, 44-52, 54-58
Terminal/Tray: 1928498135/19
Core/Insulation Crimp: Pins 5 - K/K
Core/Insulation Crimp: Pins 7, 9-10, 12-15, 17, 19-20, 22-27, 34-36, 38-39, 41-42, 44-52, 54-58 - J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)