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HOMESERVICE MANUALSCHEVROLET2008HHR SS, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALBODY ELECTRICALWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT VIEWS & COMPONENT CONNECTOR END VIEWSCOMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X1 (L61/LE5)
2008 Chevrolet HHR SS, Standard

Engine Control Module (ECM) X1 (L61/LE5)

2008 Chevrolet HHR SS, StandardSECTION Engine Control Module (ECM) X1 (L61/LE5)
Fig 1: Engine Control Module (ECM) X1 (L61/LE5) Connector End View
GM1673472Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (L61/LE5)

Pin Wire Circuit Function
1 0.35 D-BU 1161 APP Sensor 1 Signal
2 - - Not Used
3 0.35 BN 4 Accessory Voltage
4 - - Not Used
5 0.35 D-GN 335 Low Speed Cooling Fan Relay Control
6 0.35 L-GN/WH 465 Fuel Pump Relay Control (-Primary)
7-10 - - Not Used
11 0.35 OG/D-GN 7360 Manual Transmission Clutch Position Sensor Return
12 - - Not Used
13 0.35 BN 5991 Powertrain Relay Control
14-17 - - Not Used
18 0.35 L-BU 1162 APP Sensor 2 Signal
19 0.5 PK/BK 1039 Ignition 1 Voltage
20 0.5 RD/WH 840 Battery Positive Voltage
21 0.35 PU 1272 Low Reference
22-23 - - Not Used
24 0.5 TN 2759 Low Reference
25 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
26 - - Not Used
27 0.35 BN/WH 419 MIL Control
28-29 - - Not Used
30 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control
31 - - Not Used
32 0.35 PU/WH 6386 Starter Enable Relay Control
33 - - Not Used
34 0.35 PU/WH 6356 VSS Signal Low
35-36 - - Not Used
37 0.35 YE 492 Mass Air Flow Sensor Signal
38 - - Not Used
39 0.35 PU 1589 Fuel Level Sensor Signal (+Primary)
40 - - Not Used
41 0.35 BN 1271 Low Reference
42 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
43 0.35 TN/BK 2500 High Speed GMLAN Serial Data (+)
44 0.35 TN 2501 High Speed GMLAN Serial Data (-)
45 0.5 D-BU/WH 7361 Manual Transmission Clutch Position Sensor Supply
46 - - Not Used
47 0.35 WH/BK 1164 5-Volt Reference
48-53 - - Not Used
54 0.35 BN/WH 6354 VSS Signal High
55 0.35 L-BU 20 Stop Lamp Supply Voltage
56 - - Not Used
57 0.35 D-GN 6307 Clutch Start Neutral Start Signal
58 0.35 L-BU 6289 Intake Air Temperature Sensor Signal
59-60 - - Not Used
61 0.35 L-GN 6338 Manual Transmission Clutch Position Sensor Signal Position
62-65 - - Not Used
66 0.5 GY 2709 5-Volt Reference
67 0.35 TN 1274 5-Volt Reference
68-69 - - Not Used
70 0.5 WH 1310 EVAP Canister Vent Solenoid Control
71-72 - - Not Used
73 0.8 PK/BK 6341 Powertrain Relay Contact Signal
Connector Part Information 
  • OEM: 34566-0103
  • Service: See Catalog
  • Description: 73-Way F MX 123 Series (BK)
Terminal Part Information 
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
RENDER: 1.0x

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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.