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Engine Control Module (ECM) X2 (LY7)

Fig 1: Engine Control Module (ECM) X2 (LY7) Connector End View
GM1673472Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X2 (LY7)

Pin Wire Circuit Function
1 0.5 BN/WH 6405 Ignition Coil 1 Control
2 0.5 TN/WH 7349 Low Reference
3 0.5 D-GN 7352 Oxygen Sensor Bank 1 Sensor 1 Signal
4 0.5 OG/D-BU 7357 Oxygen Sensor Bank 1 Sensor 2 Signal
5 0.5 WH/YE 7356 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 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 Ignition Coil 2 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 Low Reference
28 - - Not Used
29 0.5 TN 2752 Low Reference
30 0.5 BN/WH 6754 Low Reference
31 0.5 D-BU/WH 6756 Low Reference
32 0.5 GY 6418 Fuel Injector 4 Control
33 0.5 D-GN/WH 6407 Ignition Coil 3 Control
34 0.5 PU/WH 6410 Ignition Coil 6 Control
35 0.5 PU 6413 Low Reference
36 0.5 D-GN 6457 Camshaft CAM X Supply Voltage 1
37 0.5 OG 6260 Camshaft CAM Y Supply Voltage 1
38 0.5 PK 6261 Camshaft CAM Z Supply Voltage 1
39 0.5 D-BU 6259 Camshaft CAM W Supply Voltage 1
40-41 - - Not Used
42 0.5 TN 2760 Low Reference
43 0.5 PU/WH 6270 5-Volt Reference 2
44 0.5 GY 2701 5-Volt Reference 2
45 - - Not Used
46 0.5 BN 6753 Low Reference
47 0.5 D-BU 6755 Low Reference
48 0.5 D-BU 6416 Fuel Injector 2 Control
49 0.5 OG 6420 Fuel Injector 6 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 5 Control
53 0.5 L-BU/WH 6408 Ignition Coil 4 Control
54 0.5 L-GN/WH 6409 Ignition Coil 5 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 3 Control
72 0.5 BN 6415 Fuel Injector 1 Control
73 2 BK/WH 451 Ground
Connector Part Information 
  • OEM: 34566-5203
  • Service: See Catalog
  • Description: 73-Way F MX123 34566 Series, Sealed (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)
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