Engine Control Module (ECM) X3 (LY7)

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

Fig 1: Engine Control Module (ECM) X3 (LY7) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1-2	-	-	Not Used
3	0.8 TN/WH	3211	HO2S Low Signal Bank 2 Sensor 1
4	0.8 PU/WH	3210	HO2S Reference Voltage Bank 2 Sensor 1
5	0.8 PU	3220	HO2S High Signal Bank 2 Sensor 2
6	0.8 TN	3221	HO2S Low Signal Bank 2 Sensor 2
7	0.35 OG	225	Generator Turn On Signal
8-14	-	-	Not Used
15	0.35 L-GN	3212	HO2S Heater Low Control Bank 2 Sensor 1
16-20	-	-	Not Used
21	0.35 TN	5514	Low Reference
22	-	-	Not Used
23	0.5 OG/BK	469	Low Reference
24	0.35 TN/WH	2759	Low Reference
25-28	-	-	Not Used
29	0.35 GY	23	Generator Field Duty Cycle Signal
30-31	-	-	Not Used
32	0.35 OG	6392	IMT Valve Control
33	0.35 TN	2501	High Speed GMLAN Serial Data Bus-
34	-	-	Not Used
35	0.5 TN	2761	Low Reference
36	-	-	Not Used
37	0.35 GY	2700	5-Volt Reference
38	-	-	Not Used
39	0.5 GY	2704	5-Volt Reference
40-45	-	-	Not Used
46	0.35 OG/BK	1786	Park/Neutral Signal
47	-	-	Not Used
48	0.5 D-GN/WH	428	EVAP Canister Purge Solenoid Control
49	0.35 D-GN	335	Low Speed Cooling Fan Relay Control
50	0.35 OG/WH	3223	HO2S Heater Low Control Bank 2 Sensor 2
51-52	-	-	Not Used
53	0.35 TN/BK	2500	High Speed GMLAN Serial Data Bus+
54	-	-	Not Used
55	0.5 YE	410	ECT Sensor Signal
56	-	-	Not Used
57	0.35 OG/BK	380	A/C Refrigerant Pressure Sensor Signal
58	-	-	Not Used
59	0.5 L-GN	432	MAP Sensor Signal
60-63	-	-	Not Used
64	0.35 YE/BK	6806	IMT Valve Signal
65	0.35 TN/BK	231	Oil Pressure Switch Signal
66-73	-	-	Not Used

Connector Part Information

OEM: 13542577
Service: See Catalog
Description: 73-Way F Receptacle 0.64 (BK)

Terminal Part Information

Pins: 7, 15, 21, 24, 29, 32, 33, 37, 46, 49, 50, 53, 57, 64, 65
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 3, 4, 5, 6, 23, 35, 39, 48, 55, 59
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 3, 4, 5, 6 - K/K
Core/Insulation Crimp: Pins 23, 35, 39, 48, 55, 59 - J/J
Core/Insulation Crimp: Pins 17, 18, 19, 20, 26, 27, 29, 30, 37, 40 - J/J
Core/Insulation Crimp: Pins 6, 7, 8, 9, 19, 20, 21, 22, 23, 32, 35, 36, 37, 38, 39, 42, 48, 49, 52, 56, 57, 58, 59, 62, 67, 71, 72 - J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)