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Home >> Pontiac >> 2009 >> G8 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 548 (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) X3

Engine Control Module (ECM) X3

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) X3 Connector End View
GM1650395Courtesy of GENERAL MOTORS COMPANY
Engine Control Module (ECM) X3

Pin Wire Circuit Function
1-2 - - Not Used
3 0.5 BN/WH 3211 HO2S Low Reference Bank 1 Sensor 1
4 0.5 PU/WH 3210 HO2S Reference Voltage Bank 1 Sensor 1
5-6 - - Not Used
7 0.5 OG 225 Generator Turn On Signal
8 0.5 L-GN 1652 Reverse Lockout Solenoid Control
9 0.5 WH/BK 436 AIR Pump Relay Control
10-14 - - Not Used
15 0.8 L-GN/WH 3112 HO2S Heater Low Control Bank 1 Sensor 1
16-20 - - Not Used
21 0.5 L-BU 5514 Low Reference
22 - - Not Used
23 0.5 OG/BK 469 Low Reference
24-25 - - Not Used
26 0.5 WH/GY 6786 Low Reference
27-28 - - Not Used
29 0.5 GY 23 Generator Field Duty Cycle Signal
30-32 - - Not Used
33 0.35 BN 2501 High Speed GMLAN Serial Data Bus -
34 - - Not Used
35 0.35 PK 2761 Low Reference
36 - - Not Used
37 0.5 GY/BK 2700 5-Volt Reference 1
38 - - Not Used
39 0.5 GY/WH 2704 5-Volt Reference 1
40-41 - - Not Used
42 0.5 TN/WH 6790 5-Volt Reference 2
43-45 - - Not Used
46 0.5 GY/OG 1786 Park/Neutral Signal
47 - - Not Used
48 0.5 GN/WH 428 EVAP Canister Purge Solenoid Control
49 0.5 GN 335 Low Speed Cooling Fan Relay Control
50-52 - - Not Used
53 0.35 BN/BK 2500 High Speed GMLAN Serial Data Bus +
54 - - Not Used
55 0.5 YE 410 ECT Sensor Signal
56 - - Not Used
57 0.5 OG/WH 380 A/C Refrigerant Pressure Sensor Signal
58 - - Not Used
59 0.5 L-GN/BK 432 MAP Sensor Signal
60-61 - - Not Used
62 0.5 YE/GY 6788 Air Injection Position Signal
63-64 - - Not Used
65 0.5 YE/GN 231 Oil Pressure Switch Signal
66-73 - - Not Used
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 34566-3103
  • Service Connector: 88988372
  • Description: 73-Way F MX123 34566 Series (GY with BK Case)
Terminal Part Information
  • 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
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