K20 Engine Control Module X3
 Courtesy of GENERAL MOTORS CORP.
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Connector Part Information
- Harness Type: Engine
- OEM Connector: 34566-0203
- Service Connector: 88988372
- Description: 73-Way F MX123 34566 Series (BK with GY Terminal Position Assurance Lock)
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Terminal Part Information
- Pins: 3-6, 10, 21, 27-30, 32, 34, 37, 39, 43, 45, 46, 57, 59, 63, 64, 67, 68
- Terminated Lead: 13575575
- Release Tool: J-38125-213
- Diagnostic Test Probe: J-35616-64B (L-BU)
- Terminal/Tray: 33467-0005/23
- Core/Insulation Crimp: J/J
- Pins: 73
- Terminated Lead: 13576392
- Release Tool: J-38125-11A
- Diagnostic Test Probe: J-35616-35 (VT)
- Terminal/Tray: Pending
- Core/Insulation Crimp: Pending
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K20 Engine Control Module X3
| Pin |
Size |
Color |
Circuit |
Function |
Option |
| 1-2 |
- |
- |
- |
Not Used |
- |
| 3 |
0.5 |
L-BU |
3722 |
Evaporative Emission System Leak Detection Pump Assembly Vacuum Pump Ground |
- |
| 4 |
0.5 |
GY |
3723 |
Evaporative Emission System Leak Detection Pump Assembly Changeover Valve Ground |
- |
| 5 |
0.5 |
L-GN |
3726 |
Evaporative Emission Vent Solenoid Valve Ground |
- |
| 6 |
0.5 |
YE/L-BU |
5494 |
Cylinder Shutoff Solenoid Control (4) |
- |
| 7-9 |
- |
- |
- |
Not Used |
- |
| 10 |
0.5 |
L-GN/L-BU |
428 |
EVAP Canister Purge Solenoid Control |
- |
| 11-26 |
- |
- |
- |
Not Used |
- |
| 27 |
0.5 |
BK/L-GN |
6281 |
Low Reference |
- |
| 28 |
0.5 |
GY/RD |
2704 |
5 Volt Reference |
- |
| 29 |
0.5 |
BK/L-GN |
469 |
Low Reference |
- |
| 30 |
0.5 |
BK/BN |
2761 |
Low Reference |
- |
| 31 |
- |
- |
- |
Not Used |
- |
| 32 |
0.5 |
GY/WH |
3122 |
Heated Oxygen Sensor Heater Low Control Bank 1 Sensor (2) |
- |
| 33 |
- |
- |
- |
Not Used |
- |
| 34 |
0.5 |
WH |
1579 |
Fuel Temperature/Composition Signal (Not Used - E85) |
- |
| 35-38 |
- |
- |
- |
Not Used |
- |
| 39 |
0.5 |
BN/RD |
3724 |
Evaporative Emission System Leak Detection Pump Assembly Pressure Sensor Voltage Reference |
- |
| 40-42 |
- |
- |
- |
Not Used |
- |
| 43 |
0.5 |
YE/RD |
2709 |
5 Volt Reference |
- |
| 44 |
- |
- |
- |
Not Used |
- |
| 45 |
0.5 |
L-GN/WH |
432 |
Manifold Absolute Pressure Sensor Signal |
- |
| 46 |
0.5 |
L-BU |
410 |
Engine Coolant Temperature Sensor Signal |
- |
| 47-58 |
- |
- |
- |
Not Used |
- |
| 59 |
0.5 |
L-BU/L-GN |
3725 |
Evaporative Emission System Leak Detection Pump Assembly Pressure Sensor Signal |
- |
| 60-62 |
- |
- |
- |
Not Used |
- |
| 63 |
0.5 |
L-BU/WH |
890 |
Fuel Tank Pressure Sensor Signal |
- |
| 64 |
0.5 |
L-BU/VT |
1589 |
Primary Fuel Level Sensor Signal |
- |
| 65-66 |
- |
- |
- |
Not Used |
- |
| 67 |
0.5 |
WH/YE |
3121 |
Heated Oxygen Sensor Low Signal Bank 1 Sensor (2) |
- |
| 68 |
0.5 |
VT/L-BU |
3120 |
Heated Oxygen Sensor High Signal Bank 1 Sensor (2) |
- |
| 67-72 |
- |
- |
- |
Not Used |
- |
| 73 |
2.0 |
BK/L-BU |
- |
Not Used |
- |