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Home >> Cadillac >> 2007 >> CTS V >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls And Fuel - 6.0L - Introduction (2 Of 2) >> Component Locator >> Engine Control Module Connector End Views >> Engine Control Module (ECM) - C2
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Engine Control Module (ECM) - C2

Fig 1: Engine Control Module (ECM) - C2 Connector End View
GM1581643Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) - C2 Connector Parts Information

Connector Part Information 
  • OEM: 34566-7103
  • Service: 88988931
  • Description: 73-Way F (BK) (Encased in BK)
Terminal Part Information 
  • Pins: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: 2/5
  • Release Tool/Test Probe: 12094430/J-35616-35 (VT)
  • Pins: 1, 17, 18, 29, 33, 34, 44, 53, 54, 55, 64, 66
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 2, 3, 4, 5, 13, 28, 68, 69, 6, 7, 8, 9, 11, 12, 16, 19, 23, 24, 27, 32, 35, 39, 40, 42, 43, 48, 49, 52, 59, 60, 62, 63, 67, 70, 71, 72
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 2, 3, 4, 5, 13, 28, 68, 69 - K/K
  • Core/Insulation Crimp: Pins 6, 7, 8, 9, 11, 12, 16, 19, 23, 24, 27, 32, 35, 39, 40, 42, 43, 48, 49, 52, 59, 60, 62, 63, 67, 70, 71, 72 - J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) - C2 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1 PU 2121 IC 1 Control
2 TN 1664 HO2S Low Signal - Bank 1 Sensor 1
3 PU/WH 1665 HO2S High Signal - Bank 1 Sensor 1
4 PU/WH 1668 HO2S High Signal - Bank 1 Sensor 2
5 TN/WH 1669 HO2S Low Signal - Bank 1 Sensor 2
6 L-BU 1876 Knock Sensor 2 Signal
7 TN 407 Low Reference
8 D-BU 496 Knock Sensor/Signal
9 GY 1716 Low Reference
10 - - Not Used
11 YE 581 TAC Motor Control - 1
12 BN 582 TAC Motor Control - 2
13 PK/BK 5290 Powertrain Main Relay Fused Supply
14-15 - - Not Used
16 L-BU/BK 1746 Fuel Injector 3 Control
17 PU/WH 2128 IC 8 Control
18 D-GN/WH 2124 IC 4 Control
19 BN/WH 2130 Low Reference
20-22 - - Not Used
23 PK/BK 632 Low Reference
24 BK 2755 Low Reference
25-26 - - Not Used
27 YE/BK 1868 Low Reference
28 PK/BK 5290 Powertrain Main Relay Fused Supply
29 TN/WH 1704 Low Reference
30-31 - - Not Used
32 L-GN/BK 1745 Fuel Injector 2 Control
33 OG 2127 IC 7 Control
34 D-GN 2125 IC 5 Control
35 BN 2129 Low Reference
36-38 - - Not Used
39 OG 631 12-Volt Reference
40 GY 2705 5-Volt Reference
41 - - Not Used
42 TN 552 Low Reference
43 L-GN 1867 12-Volt Reference
44 L-BU/WH 1688 5-Volt Reference
45-47 - - Not Used
48 D-BU/WH 878 Fuel Injector 7 Control
49 TN/WH 845 Fuel Injector 5 Control
50-51 - - Not Used
52 YE/BK 846 Fuel Injector 6 Control
53 OG/WH 2122 IC 2 Control
54 L-BU/WH 2126 IC 6 Control
55 L-BU 2123 IC 3 Control
56-58 - - Not Used
59 BN/WH 633 CMP Sensor
60 TN/WH 331 Oil Pressure Sensor Signal
61 - - Not Used
62 TN 472 IAT Sensor Signal
63 D-BU/WH 1869 CKP Sensor Signal
64 D-GN 485 TP Sensor 1 Signal
65 - - Not Used
66 PU 486 TP Sensor 2 Signal
67 YE 492 MAF Sensor Signal
68 GY/WH 3113 HO2S Heater Low Control - Bank 1 Sensor 1
69 BN 2391 HO2S Heater Low Control - Bank 1 Sensor 2
70 L-BU/BK 844 Fuel Injector 4 Control
71 OG/BK 877 Fuel Injector 7 Control
72 TN 1744 Fuel Injector 1 Control
73 BK 750 Ground
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