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Home >> Chevrolet >> 2008 >> Uplander Base, 3.9 1 >> Repair and Diagnosis >> Quick Lookups >> Electrical Component Locations >> Wiring Systems And Power Management - Component Views & Component Connector End Views >> Component Connector End Views >> Engine Control Module (ECM) X2

Engine Control Module (ECM) X2

Fig 1: Engine Control Module (ECM) X2 Connector End View
GM1335545Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X2

Pin Wire Circuit Function
1 0.35 PU 2121 IC 1 Control
2 0.8 TN/WH 3111 HO2S Low Signal - Sensor 1
3 0.8 PU/WH 3110 HO2S High Signal - Sensor 1
4 0.8 PU 3120 HO2S High Signal - Sensor 2
5 0.8 GY 3122 HO2S Low Signal - Sensor 2
6 0.5 L-BU 1876 KS 2 Signal
7 0.5 GY 2303 KS 2 Signal
8 0.5 D-BU 496 KS 1 Signal
9 0.5 GY 1716 KS 1 Signal
10 0.35 BK/WH 1251 Ground
11 0.5 YE 581 TAC Motor Control - 1
12 0.5 BN 582 TAC Motor Control - 2
13 0.5 PK/BK 5290 Ignition Voltage
14 0.35 BN 2198 Camshaft Position Actuator Solenoid High Control
15-16 - - Not Used
17 0.35 OG/WH 2122 IC 2 Control
18-22 - - Not Used
23 0.35 TN 407 Low Reference
24 0.35 TN 808 Low Reference
25 - - Not Used
26 0.35 BK/WH 1251 Ground
27 0.35 YE/BK 1868 Low Reference
28 - - Not Used
29 0.5 TN 2752 Low Reference
30-31 - - Not Used
32 0.5 L-BU/BK 844 Fuel Injector 4 Control
33 0.35 L-BU 2123 IC 3 Control
34 - - Not Used
35 0.35 YE 2174 Low Reference
36-38 - - Not Used
39 0.35 D-BU 6259 5-Volt Reference
40 0.35 GY 605 5-Volt Reference
41 - - Not Used
42 0.35 TN 2760 Low Reference
43 0.35 L-GN 1867 5-Volt Reference
44 0.5 GY 2701 5-Volt Reference
45 - - Not Used
46 0.35 TN 2199 Low Reference
47 - - Not Used
48 0.5 L-GN/BK 1745 Fuel Injector 2 Control
49 0.5 YE/BK 846 Fuel Injector 6 Control
50-51 - - Not Used
52 0.5 TN/WH 845 Fuel Injector 5 Control
53-58 - - Not Used
59 0.35 BN/WH 633 CMP Sensor Signal
60 0.35 TN/WH 331 Oil Pressure Sensor Signal
61 - - Not Used
62 0.35 TN 472 IAT Sensor Signal
63 0.35 L-BU/WH 1800 CKP 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 0.35 YE 492 MAF Sensor Signal
68 0.5 GY/WH 3113 HO2S Heater Low Control - Sensor 1
69 0.5 TN/WH 3121 HO2S Heater Low Control - Sensor 2
70 - - Not Used
71 0.5 PK/BK 1746 Fuel Injector 3 Control
72 0.5 TN 1744 Fuel Injector 1 Control
73 2.0 BK/WH 451 Ground
Connector Part Information 
  • OEM: 34566-0103
  • Service: See Catalog
  • Description: 73-Way F MX123 Series Sealed (BK)
Terminal Part Information 
  • Pins: 1, 10, 14, 17, 23-24, 26-27, 33, 35, 39-40, 42-43, 46, 59-60, 62-63, 67
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64A (L-BU)
  • Pins: 2-9, 11-13, 29, 32, 44, 48-49, 52, 64, 66, 68- 69, 71-72
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins: 2-5: K/K
  • Core/Insulation Crimp: Pins: 6-9, 11-13, 29, 32, 44, 48-49, 52, 64, 66, 68-69, 71-72: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64A (L-BU)
  • Pin: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: 2/5
  • Release Tool/Test Probe: 12094430/J-35616-4A (PU)
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