Engine Control Module (ECM) Connector End View X2 (LY7)

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

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) X2 (LY7) Connector Parts Information

Connector Part Information

OEM: 34566-5203
Service: See Catalog
Description: 73-Way F MX123 34566 Series (BK)

Terminal Part Information

Pins: 73
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: 2/5
Release Tool/Test Probe: 12094430/J-35616-35 (VT)

Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 1-9, 14, 15, 17, 19-24, 27, 29-39, 42-44, 46-54, 56-59, 62-64, 66-69, 71, 72 - J/J
Core/Insulation Crimp: Pins 11-13 - K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) X2 (LY7) Connector Terminal Identification

Pin	Wire	Circuit No.	Function
1	0.5 BN/WH	6405	EST A Control
2	0.5 TN/WH	7349	Oxygen Sensor Heated A Low Reference
3	0.5 D-GN	7352	Oxygen Sensor Heated A High Reference
4	0.5 OG/D-BU	7357	Oxygen Sensor Heated C High Reference
5	0.5 WH/YE	7356	Oxygen Sensor Heated C Low Reference
6	0.5 L-BU	1876	Knock Sensor 2 Signal
7	0.5 TN	407	Low Reference
8	0.5 D-BU	496	Knock Sensor [1] Signal
9	0.5 GY	1716	Low Reference
10	-	-	Not Used
11	0.8 YE	581	TAC Motor Control - 1
12	0.8 BN	582	TAC Motor Control - 2
13	0.8 PK/BK	5290	Ignition II/III Voltage
14	0.5 PK/BK	6395	Cam Phaser #2 Control
15	0.5 TN/BK	6397	Cam Phaser #4 Control
16	-	-	Not Used
17	0.5 D-BU/WH	6406	EST B Control
18	-	-	Not Used
19	0.5 PK	6414	Inside Air Temperature Sensor Signal
20	0.5 PU	6267	Camshaft CAM X Ground
21	0.5 TN	6268	Camshaft CAM Y Ground
22	0.5 WH	6269	Camshaft CAM Z Ground
23	0.5 BN	6266	Camshaft CAM W Ground
24	0.5 BK	2755	Low Reference
25-26	-	-	Not Used
27	0.5 GY/BK	6272	Crankshaft 60X Sensor Low Reference
28	-	-	Not Used
29	0.5 TN	2752	Low Reference
30	0.5 BN/WH	6754	Cam Phaser X Return Low Reference
31	0.5 D-BU/WH	6756	Cam Phaser Z Return Low Reference
32	0.5 GY	6418	Fuel Injector D Control
33	0.5 D-GN/WH	6407	EST C Control
34	0.5 PU/WH	6410	EST F Control
35	0.5 PU	6413	EST Return Low Reference
36	0.5 D-GN	6457	Camshaft CAM X Supply Voltage
37	0.5 OG	6260	Camshaft CAM Y Supply Voltage
38	0.5 PK	6261	Camshaft CAM Z Supply Voltage
39	0.5 D-BU	6259	Camshaft CAM W Supply Voltage
40-41	-	-	Not Used
42	0.5 TN	2760	Low Reference
43	0.5 PU/WH	6270	Crankshaft 60X Sensor Voltage
44	0.5 GY	2701	5-Volt Reference
45	-	-	Not Used
46	0.5 BN	6753	Cam Phaser W Return Low Reference
47	0.5 D-BU	6755	Cam Phaser Y Return Low Reference
48	0.5 D-BU	6416	Fuel Injector B Control
49	0.5 OG	6420	Fuel Injector F Control
50	0.5 WH/BK	6396	Cam Phaser #3 Control
51	0.5 GY/BK	6394	Cam Phaser Control
52	0.5 L-BU	6419	Fuel Injector E Control
53	0.5 L-BU/WH	6408	EST D Control
54	0.5 L-GN/WH	6409	EST E Control
55	-	-	Not Used
56	0.5 D-GN/WH	6264	Camshaft CAM X Signal
57	0.5 OG/BK	6263	Camshaft CAM Y Signal
58	0.5 PK/BK	6262	Camshaft CAM Z Signal
59	0.5 D-BU/WH	6265	Camshaft CAM W Signal
60-61	-	-	Not Used
62	0.5 TN	472	IAT Sensor Signal
63	0.5 WH/BK	6271	Crankshaft 60X Sensor Signal
64	0.5 D-GN	485	TP Sensor 1 Signal
65	-	-	Not Used
66	0.5 PU	486	TP Sensor 2 Signal
67	0.5 YE	492	MAF Sensor Signal
68	0.5 D-BU	6424	Oxygen Sensor Heated A Signal
69	0.5 OG	6426	Oxygen Sensor Heated C Signal
70	-	-	Not Used
71	0.5 D-GN	6417	Fuel Injector C Control
72	0.5 BN	6415	Fuel Injector A Control
73	2 BK/WH	451	Ground