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Home >> Chevrolet >> 2007 >> HHR LS, Standard >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> OEM Connector End Views >> Engine Control Module Connector End Views (2.4L) >> Engine Control Module (ECM) Connector End View 1
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Engine Control Module (ECM) Connector End View 1

Fig 1: Connector End View
GM1335545Courtesy of GENERAL MOTORS CORP.
Engine Control Module Connector End Views

Connector Part Information 
  • OEM: 34566-2603
  • Service: 88988372
  • Description: 73-Way F Micro-Pack 64 Series (BK)
Terminal Part Information 
  • Pins: 7, 21, 23, 28, 29, 33, 35, 37, 39, 44, 47-49, 53, 55, 57, 59, 65-67
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
Connector Terminal Identification

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
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 (-) (1)
34 - - Not Used
35 TN 2761 Low Reference
36 - - Not Used
37 GY 2700 5-Volt Reference
38 - - Not Used
39 GY 2704 5-Volt Reference
40-43 - - Not Used
44 L-BU/BK 1688 5-Volt Reference
45-46 - - Not Used
47 D-GN 1433 PNP/Clutch Start Switch Signal (M86)
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 (+) (1)
54 - - Not Used
55 YE 410 Engine Coolant Temperature Sensor Signal
56 - - Not Used
57 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
58 - - Not Used
59 L-GN 432 Manifold Absolute Pressure Sensor Signal
60-64 - - Not Used
65 TN/BK 231 Oil Pressure Switch Signal
66 YE 400 Vehicle Speed Sensor Signal High (w/M86)
67 PU 401 Vehicle Speed Sensor Low (w/M86)
68-73 - - Not Used
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