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HOMESERVICE MANUALSPONTIAC2007SOLSTICE BASE, STANDARDREPAIR AND DIAGNOSISELECTRICALBODY ELECTRICALOEM CONNECTOR END VIEWSENGINE CONTROL MODULE CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) CONNECTOR END VIEW C3
2007 Pontiac Solstice Base, Standard

Engine Control Module (ECM) Connector End View C3

2007 Pontiac Solstice Base, StandardSECTION Engine Control Module (ECM) Connector End View C3
Fig 1: ECM C3 Connector End View
GM1590596Courtesy of GENERAL MOTORS CORP.
ECM C3 Connector Part Information

Connector Part Information 
  • OEM: 34566-0203
  • Service: 88988372
  • Description: 73-Way F 0.64 Receptacle 2.8 Series, Sealed (GY)
Terminal Part Information 
  • Pins: 7, 21, 23, 28, 29, 35, 37, 39, 44, 46, 49, 55, 57, 59, 66, 67
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 33, 53, 65
  • Terminal/Tray:33467-0005/23
  • Core/Insulation Crimp: Pins: 33, 53, J/J
  • Core/Insulation Crimp: Pins: 65 K/K
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
ECM C3

Pin Wire Color Circuit No. Function
1-6 - - Not Used
7 OG 225 Generator Turn On Signal
8-20 - - Not Used
21 BK/WH 2751 Low Reference (C60)
22 - - Not Used
23 OG/BK 469 Low Reference
24-27 - - Not Used
28 TN/WH 1704 Low Reference
29 GY 23 Generator Field Duty Cycle Signal
30-32 - - Not Used
33 TN 2501 High Speed GMLAN Serial Data Bus (-)
34 - - Not Used
35 TN 2761 Low Reference
36 - - Not Used
37 GY 2700 5-Volt Reference (C60)
38 - - Not Used
39 GY 2704 5-Volt Reference
40-43 - - Not Used
44 L-BU/BK 1688 5-Volt Reference
45 - - Not Used
46 OG/BK 1786 Transmission Park/Neutral Signal (1) (M82)
47 D-GN 1433 PNP/Clutch Start Switch Signal
48 D-GN/WH 428 EVAP Canister Purge Solenoid Control
49 D-GN 335 Low Speed Cooling Fan Relay Control
50-52 - - Not Used
53 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
54 - - Not Used
55 YE 410 ECT Sensor Signal
56 - - Not Used
57 OG/BK 380 A/C Refrigerant Pressure Sensor Signal (C60)
58 - - Not Used
59 L-GN 432 MAP Sensor Signal
60-64 - - Not Used
65 TN/BK 231 Oil Pressure Switch Signal
66 YE 400 VSS High Signal (MA5)
67 PU 401 VSS Low Signal (MA5)
68-73 - - Not Used
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.