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Engine Control Module (ECM) X2 (Diesel)

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GM1968294Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 12603596
  • Service Connector: 13574947
  • Description: 73-Way F MX123 34566 Series (BK)
Terminal Part Information
  • Pins: 1, 3-11, 13-19, 21-22, 25, 27, 29-32, 41, 47-48, 66-67
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe:J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins: 1, 3, 5-11, 22, 25, 27, 41, 47-48, 66-67 - K/K
  • Core/Insulation Crimp: Pins: 4, 13-19, 21, 29-32 - J/J
  • Pin 73
  • Terminated Lead: Pending
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
Engine Control Module (ECM) X2 (Diesel)

Pin Wire Circuit Function
1 0.5 L-GN 497 Fuel Pump Primary Relay Control (N2N)
2 - - Not Available
3 0.5 YE 2928 Fuel Metering Valve High Control
4 0.8 PU/WH 2530 Fuel Rail Pressure Solenoid Supply Voltage
5 0.5 BK 2929 Fuel Metering Valve Low Control
6 0.5 WH 5931 Variable Nozzle Turbo Solenoid Low Signal
7 0.5 TN 2752 Low Reference
8 0.5 TN 2753 Low Reference
9 0.5 BN 1174 Oil Level Switch Signal
10 0.5 BN 6782 Low Reference
11 0.5 TN 3653 Low Reference (LML)
12 - - Not Available
13 0.8 BN/WH 4901 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 1
14 0.8 TN/WH 4907 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 7
15 0.8 L-BU 4804 Direct Fuel Injector (DFI) High Voltage Control Cylinder 4
16 0.8 BN 4801 Direct Fuel Injector (DFI) High Voltage Control Cylinder 1
17 0.8 BK/WH 451 Ground
18 0.8 BK/WH 451 Ground
19 0.8 YE 2834 Low Reference
20 - - Not Available
21 0.8 BK/WH 451 Ground
22 0.5 D-BU 5930 Variable Nozzle Turbo Solenoid High Signal
23-24 - - Not Available
25 0.5 OG/BK 5929 Low Reference
26 - - Not Available
27 0.5 YE/BK 1827 Vehicle Speed Signal
28 - - Not Available
29 0.8 L-BU/WH 4904 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 4
30 0.8 PU/WH 4906 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 6
31 0.8 TN 4807 Direct Fuel Injector (DFI) High Voltage Control Cylinder 7
32 0.8 PU 4806 Direct Fuel Injector (DFI) High Voltage Control Cylinder 6
33-40 - - Not Available
41 0.5 BK 2755 Low Reference
42-46 - - Not Available
47 0.5 GY 2702 5 Volt Reference
48 0.5 GY 3652 5 Volt Reference (LML)
49-65 - - Not Available
66 0.5 TN 5928 Variable Nozzle Turbo Position Sensor Voltage Reference
67 0.5 PU/WH 6270 5 Volt Reference
68-72 - - Not Available
73 3 BK/WH 451 Ground
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