Engine Control Module (ECM) X2 (Diesel)
 Courtesy of GENERAL MOTORS COMPANY
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Connector Part Information
- Harness Type: Engine
- OEM Connector: 12603596
- Service Connector: 13574947
- Description: 73-Way F MX123 34566 Series (BK)
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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
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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 |