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Home >> Cadillac >> 2011 >> DTS 4.6 6 >> Repair and Diagnosis >> Quick Lookups >> Wiring Diagrams >> Wiring Systems And Power Management - Component Connector End Views - Engine Control Module X2 Through Pressure Control Solenoid >> Component Connector End Views >> Engine Control Module (ECM) X2
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Engine Control Module (ECM) X2

Fig 1: Engine Control Module (ECM) X2 Connector End View
GM1673472Courtesy of GENERAL MOTORS COMPANY
Engine Control Module (ECM) X2

Pin Wire Circuit Function
1 0.5 PU/BK 2121 IC 1 Control
2 0.35 TN/OG 3111 HO2S Low Reference Bank 2 Sensor 1
3 0.35 GN 3110 HO2S Reference Voltage Bank 2 Sensor 1
4 0.5 PK/OG 3120 HO2S 2 High Signal
5 0.5 BN/PK 3121 HO2S 2 Low Signal
6 0.5 PK/YE 1876 Knock Sensor 2 Signal
7 0.5 GY 2303 Knock Sensor 2 Signal
8 0.5 BU 496 Knock Sensor 1 Signal
9 0.5 WH/GY 1716 Knock Sensor 1 Signal
10 - - Not Used
11 0.8 YE 581 TAC Motor Control - 1
12 0.8 OG 582 TAC Motor Control - 2
13 0.75 PK 5290 Ignition 1 Voltage
14-15 - - Not Used
16 0.5 RD/BK 878 Fuel Injector 8 Control
17 0.5 OG/WH 2122 IC 2 Control
18 0.5 L-BU/WH 2126 IC 6 Control
19 0.5 TN/WH 2130 Low Reference
20-22 - - Not Used
23 0.5 TN 6266 Low Reference
24 - - Not Used
25 0.5 BN/GN 2753 Low Reference
26 - - Not Used
27 0.5 GY/BK 6272 Low Reference
28 - - Not Used
29 0.5 RD/YE 2752 Low Reference
30 - - Not Used
31 0.5 GY 435 EGR Solenoid Low Control
32 0.5 PK 1746 Fuel Injector 3 Control
33 0.5 OG 2127 IC 7 Control
34 0.5 GN 2125 IC 5 Control
35 0.5 TN 2129 Low Reference
36-38 - - Not Used
39 0.5 PK/WH 6259 5-Volt Reference 2
40 - - Not Used
41 0.5 PK/BN 2702 5-Volt Reference 1
42 0.5 BN/D-BU 2760 Low Reference
43 0.5 RD/GY 6270 CKP Sensor 5-Volt Reference
44 0.5 PK/RD 2701 5-Volt Reference 2
45-47 - - Not Used
48 0.5 L-GN/BK 1745 Fuel Injector 2 Control
49 0.5 BN/WH 845 Fuel Injector 5 Control
50 - - Not Used
51 0.5 RD/L-BU 1676 EGR Solenoid High Control
52 0.5 L-BU/BK 844 Fuel Injector 4 Control
53 0.5 L-BU 2123 IC 3 Control
54 0.5 GN/WH 2124 IC 4 Control
55 0.5 PU/WH 2128 IC 8 Control
56-58 - - Not Used
59 0.5 BU/WH 6265 CMP Sensor Signal
60 - - Not Used
61 0.5 L-GN/RD 1456 EGR Valve Position Signal
62 0.5 BN 472 IAT Sensor Signal
63 0.5 WH/BK 6271 CKP Sensor Signal
64 0.5 GN 485 TP Sensor 1 Signal
65 - - Not Used
66 0.5 PU 486 TP Sensor 2 Signal
67 0.5 BN/YE 492 MAF Sensor Signal
68 0.35 WH 3113 HO2S Heater Low Control Bank 2 Sensor 1
69 0.8 GY/WH 3122 HO2S 2 Heater Low Control
70 0.5 YE/BK 846 Fuel Injector 6 Control
71 0.5 OG/BK 877 Fuel Injector 7 Control
72 0.5 BN/BK 1744 Fuel Injector 1 Control
73 2 BK/WH 1551 Ground
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 34566-2903
  • Service Connector: 88988931
  • Description: 73-Way F MX123 34566 Series (GY)
Terminal Part Information
  • Pins: 1-72
  • 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
  • Pin: 73
  • Terminated Lead: 13576392
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: 2/5
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