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Engine Control Module (ECM) - X2 (LE5)

Fig 1: Engine Control Module (ECM) - X2 (LE5) Connector End View
GM1590596Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) - X2 (LE5)

Pin Wire Circuit Function
1-3 - - Not Used
4 0.5 TN 2761 Low Reference
5 0.5 PU 574 Low Reference
6 0.5 TN 1744 Fuel Injector 1 Control
7 0.5 PK/BK 1746 Fuel Injector 3 Control
8 0.5 L-BU/BK 844 Fuel Injector 4 Control
9 0.35 BN 2129 Low Reference
10 0.5 L-GN/BK 1745 Fuel Injector 2 Control
11-12 - - Not Used
13 0.35 GY 2704 5-Volt Reference 1
14 0.5 L-GN 5282 Low Reference
15 0.5 PU 5284 Camshaft Phaser Intake Solenoid Control
16 0.5 YE 581 Throttle Actuator Control Motor Control - 1
17-19 - - Not Used
20 0.35 TN 5301 Low Reference
21 0.35 GY 5296 Low Reference
22 0.35 PU 2121 IC 1 Control
23 0.35 L-BU 2123 IC 3 Control
24 0.35 D-GN/WH 2124 IC 4 Control
25 - - Not Used
26 0.35 OG/WH 2122 IC 2 Control
27-29 - - Not Used
30 0.35 D-GN/WH 428 Evaporative Emission Canister Purge Solenoid Control
31 0.35 OG 225 Generator Turn On Signal
32 0.5 BN 582 Throttle Actuator Control Motor Control - 2
33 0.35 D-BU 5300 5-Volt Reference 1
34 0.35 YE/BK 5297 5-Volt Reference 1
35-36 - - Not Used
37 0.5 PU/WH 3110 Heated Oxygen Sensor High Signal Sensor 1
38 - - Not Used
39 0.35 L-GN 432 Manifold Absolute Pressure Sensor Signal
40 0.5 TN 2752 Low Reference
41 - - Not Used
42 0.8TN 2760 Low Reference
43 0.35 GY 23 Generator Field Duty Signal
44 - - Not Used
45 0.5 YE 573 Crankshaft Position Sensor Signal
46 0.35 OG 5275 Camshaft Position Intake Sensor Signal
47 0.35 D-GN 5273 Camshaft Position Exhaust Sensor Signal
48 0.5 TN/WH 3111 Heated Oxygen Sensor Low Signal Sensor 1
49 0.35 OG/BK 469 Low Reference
50 0.5 GY 1716 Knock Sensor 1 Signal
51 0.5 D-BU 496 Knock Sensor 1 Signal
52 - - Not Used
53 0.5 GY 2701 5-Volt Reference 1
54 0.5 L-GN 2867 5-Volt Reference 2
55-56 - - Not Used
57 0.5 D-GN 485 Throttle Position Sensor 1 Signal
58 0.5 YE 410 Engine Coolant Temperature Sensor Signal
59 0.5 PU 486 Throttle Position Sensor 2 Signal
60 0.5 BN 6753 Low Reference
61 0.5 BN/WH 6754 Camshaft Phaser Exhaust Solenoid Control
62-64 - - Not Used
65 0.5 GY/WH 3113 Heated Oxygen Sensor Heater Low Control Sensor 1
66 - - Not Used
67 0.5 TN/BK 231 Oil Pressure Switch Signal
68-72 - - Not Used
73 2.0 BK/WH 451 Ground
Connector Part Information 
  • OEM: 34566-0203
  • Service: 88988372
  • Description: 73-Way F MX123 34566 Series Sealed (BK)
Terminal Part Information 
  • Pins: 9,13, 20-24, 26, 30, 31, 33, 34, 39, 42, 43, 47, 49
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 4-8, 10, 14-16, 32, 37, 40, 45-46, 48, 50, 51, 53-54, 57-61, 65, 67
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 73
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
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