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Home >> Chevrolet >> 2013 >> Volt >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Wiring Systems And Power Management - Component Connector End Views - E41 Through K43) >> Component Connector End Views >> K20 Engine Control Module X3

K20 Engine Control Module X3

WARNING: This page is about a different car, the 2011 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
GM1590596Courtesy of GENERAL MOTORS CORP.
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)
 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
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 -
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