LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2012 >> Corvette Base, 2D Convertible, Automatic Trans >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Wiring Diagrams >> Wiring Systems And Power Management - Component Connector End Views - A/C Clutch To Heated Seat Element (Driver) >> Component Connector End Views >> Engine Control Module (ECM) X2 (LS9)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine Control Module (ECM) X2 (LS9)

GM1650395Courtesy of
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 34566-1673
  • Service Connector: 88988931
  • Description: 73-Way F 0.64/2.8 Series, Sealed (BK with BK Terminal Position Assurance Lock)
Terminal Part Information
  • Pins: 1-5, 11-13, 16-19, 25, 32-35, 41, 48-55, 68-72
  • Terminated Lead: 13575812
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 1-5, 11-13, 17, 18, 25, 33, 34, 41, 53-55, 68, 69: J/J
  • Core/Insulation Crimp: Pins 16, 19, 32, 35, 48, 49, 52, 70-72: K/K
  • Pins: 6-9, 23, 24, 27, 29, 39, 40, 42-45, 59-67
  • Terminated Lead: 13575811
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Pin: 73
  • Terminated Lead: 13579770
  • 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 (LS9)

Pin Wire Circuit Function
1 0.5 PU 2121 IC1 Control
2 0.5 TN 1664 HO2S Low Signal - Bank 1 Sensor 1
3 0.5 PU/WH 1665 HO2S High Signal - Bank 1 Sensor 1
4 0.5 PU/WH 1668 HO2S High Signal Bank 1 Sensor 2
5 0.5 TN/WH 1669 HO2S Low Signal Bank 1 Sensor 2
6 0.35 L-BU 1876 Knock Sensor 2 Signal
7 0.35 GY 2303 Knock Sensor 2 Signal
8 0.35 D-BU 496 Knock Sensor 1 Signal
9 0.35 GY 1716 Knock Sensor 1 Signal
10 - - Not Used
11 0.5 YE 581 Throttle Actuator Control (TAC) Motor Control - 1
12 0.5 BN 582 Throttle Actuator Control (TAC) Motor Control - 2
13 0.5 PK 439 Ignition Voltage
14-15 - - Not Used
16 0.8 PK/BK 1746 Fuel Injector 3 Control
17 0.5 PK/WH 2128 IC 8 Control
18 0.5 D-GN/WH 2124 IC 4 Control
19 0.8 BN/WH 2130 Low Reference
20-22 - - Not Used
23 0.35 BN 6266 Low Reference
24 0.35 BK 2755 Low Reference
25 0.5 D-GN 7125 Super Charger Inlet Air Pressure Sensor Return
26 - - Not Used
27 0.35 GY/BK 6272 Low Reference
28 - - Not Used
29 0.35 TN/WH 1704 Low Reference
30-31 - - Not Used
32 0.8 L-GN/BK 1745 Fuel Injector 2 Control
33 0.5 OG 2127 IC 7 Control
34 0.5 D-GN 2125 IC 5 Control
35 0.8 BN 2129 Low Reference
36-38 - - Not Used
39 0.35 D-BU 6259 5-Volt Reference
40 0.35 GY 2705 5-Volt Reference
41 0.5 YE/BK 7124 5-Volt Reference
42 0.35 TN 2760 Low Reference
43 0.35 PU/WH 6270 5-Volt Reference
44 0.35 L-BU/BK 1688 5-Volt Reference
45 0.35 OG/BK 586 Low Reference
46-47 - - Not Used
48 0.8 D-BU/WH 878 Fuel Injector 8 Control
49 0.8 TN/WH 845 Fuel Injector 5 Control
50-51 - - Not Used
52 0.8 YE/BK 846 Fuel Injector 6 Control
53 0.5 OG/WH 2122 IC 2 Control
54 0.5 L-BU/WH 2126 IC 6 Control
55 0.5 L-BU 2123 IC 3 Control
56-58 - - Not Used
59 0.35 D-BU/WH 6265 Camshaft Position Sensor Signal
60 0.35 TN/WH 331 Oil Pressure Sensor Signal
61 - - Not Used
62 0.35 TN 472 Intake Air Temperature Sensor Signal
63 0.35 WH/BK 6271 Crankshaft Position Sensor Signal
64 0.35 D-GN 485 Throttle Position Sensor 1 Signal
65 0.35 TN/WH 585 Transmission Fluid Temperature (TFT) Sensor Signal
66 0.35 PU 486 Throttle Position Signal 2
67 0.35 YE 492 Mass Air Flow (MAF) Sensor Signal
68 0.5 GY/WH 3113 H02S Heater Low Control Bank 1 Sensor 1
69 0.5 GY/WH 3122 HO2S Heater Low Control - Bank 1 Sensor 2
70 0.8 L-BU/BK 844 Fuel Injector 4 Control
71 0.8 OG/BK 877 Fuel Injector 7 Control
72 0.8 TN 1744 Fuel Injector 1 Control
73 3.0 BK/WH 451 Ground
scientia non olet · About LEMON Manuals