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Home >> Chevrolet >> 2007 >> HHR LS, Standard >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Wiring Diagrams >> OEM Connector End Views >> Engine Control Module Connector End Views (2.2L) >> Engine Control Module (ECM) Connector End View C2
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Engine Control Module (ECM) Connector End View C2

Fig 1: Connector End View
GM1590596Courtesy of GENERAL MOTORS CORP.
Connector Part Information

Connector Part Information 
  • OEM: 34566-9403
  • Service: 88988372
  • Description: 73-Way F MX123 Series (BK)
Terminal Part Information 
  • Pins: 73
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
  • Pins: 4-8, 10, 16, 20, 30, 32, 33, 35, 37, 38, 41, 45, 46, 48, 50, 51, 54, 58, 65, 66, 67, 68
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 9, 13, 22-24, 26, 31, 39, 40, 42, 43, 49, 53, 57, 59
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Connector Terminal Identification

Pin Wire Color Circuit No. Function
1-3 - - Not Used
4 TN 2761 Low Reference
5 PU 574 Low Reference
6 TN 1744 Fuel Injector (1) Control
7 PK/BK 1746 Fuel Injector (3) Control
8 L-BU/BK 844 Fuel Injector (4) Control
9 BN 2129 Low Reference
10 L-GN/BK 1745 Fuel Injector (2) Control
11-12 - - Not Used
13 GY/BK 2704 5-Volt Reference
14-15 - - Not Used
16 YE 581 TAC Motor Control (1)
17-19 - - Not Used
20 TN 5301 Low Reference
21 - - Not Used
22 PU 2121 Ignition Control (1)
23 L-BU 2123 Ignition Control (3)
24 D-GN/WH 2124 Ignition Control (4)
25 - - Not Used
26 OG/WH 2122 Ignition Control (2)
27-29 - - Not Used
30 D-GN/WH 428 EVAP Canister Purge Solenoid Control
31 OG 225 Generator Turn On Signal
32 BN 582 TAC Motor Control (2)
33 D-BU 5300 5-Volt Reference
34 - - Not Used
35 GY 6255 5-Volt Reference
36 - - Not Used
37 PU/WH 3110 Heated Oxygen Sensor High Signal Sensor 1
38 PU/WH 1668 Heated Oxygen Sensor High Signal Sensor 2
39 L-GN 432 Manifold Absolute Pressure Sensor Signal
40 TN 2752 Low Reference
41 PU/WH 6256 Low Reference
42 TN 2760 Low Reference
43 GY/WH 23 Generator Field Duty Cycle Signal
44 - - Not Used
45 YE 573 Crankshaft Position Sensor Signal
46 OG 5275 CMP Sensor Signal
47 - - Not Used
48 TN/WH 3111 Heated Oxygen Sensor Low Signal Sensor 1
49 OG/BK 469 Low Reference
50 GY 1716 Knock Sensor Signal
51 D-BU 496 Knock Sensor Signal
52 - - Not Used
53 GY 2701 5-Volt Reference
54 L-GN 2867 5-Volt Reference
55-56 - - Not Used
57 D-GN 485 Throttle Position Sensor (1) Signal
58 YE 410 Engine Coolant Temperature Sensor Signal
59 PU 486 Throttle Position Sensor (2) Signal
60-64 - - Not Used
65 GY/WH 3113 Heated Oxygen Sensor Heater Low Control Sensor 1
66 GY/WH 1423 Heated Oxygen Sensor Heater Low Control Sensor 2
67 TN/BK 231 Oil Pressure Switch Signal
68 TN/WH 1669 Heated Oxygen Sensor Low Signal Sensor 2
69-72 - - Not Used
73 BK/WH 451 Signal Ground
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