2007 Chevrolet Optra5 LS, AutomaticFACTORY OEM SERVICE PROCEDURE

Engine Control Module Connector End Views

Engine Control Module (ECM) A (HV-240)

GM1481265Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • PED 12129231
  • 32-Way Retainer Lock (GY)
Pin Wire Color Circuit Number Function
1 BK/WH 51 Ground
2 BK/WH 51 Ground
3 YE/BK 496 Knock Sensor Signal
4 D-GN 411 Exhaust Gas Recirculation (EGR) Valve Control
5 - - Not Used
6 YE/BK 1868 Low Reference
7 D-BU 417 Throttle Position (TP) Sensor Signal
8 PK/BK 1746 Fuel Injector 3 Control
9 BK 1744 Fuel Injector 1 Control
10 BK/WH 252 Low Reference
11 YE 410 Engine Coolant Temperature (ECT) Sensor Signal
12 D-GN/RD 1665 Oxygen (O2) Sensor 1 Low Reference (Unleaded Only)
13 PU/WH 1749 Idle Air Control (IAC) Coil B High Control
14 - - Not Used
15 GY 416 5-Volt Reference
16 OG/BK 469 Low Reference
17 BK/WH 51 Ground
18 L-BU 406 Ignition Coil (IC) 1 and 4 Control
19 D-GN/WH 423 Ignition Coil (IC) 2 and 3 Control
20 D-GN/WH 428 Evaporative Emissions (EVAP) Canister Purge Solenoid Control
21 D-BU/WH 1869 Crankshaft Position (CKP) Sensor Signal
22 L-GN/BK 1745 Fuel Injector 2 Control
23 BN 472 Intake Air Temperature (IAT) Sensor 5-Volt Reference
24 L-GN 432 Manifold Absolute Pressure (MAP) Sensor Signal
25 BN/WH 633 Camshaft Position (CMP) Sensor Signal
26 L-BU/BK 844 Fuel Injector 4 Control
27 GY 1653 Oxygen (O2) Sensor 1 Signal (Unleaded Only)
28 BN 1747 Idle Air Control (IAC) Coil A High Control
29 WH 444 Idle Air Control (IAC) B Low Control
30 YE/WH 1748 Idle Air Control (IAC) A Low Control
31 L-BU/BK 1688 5-Volt Reference Voltage
32 BK/YE 808 Low Reference
Engine Control Module (ECM) B (HV-240)

GM1468388Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • PED 12129232
  • 32-Way Retainer Lock (WH)
Pin Wire Color Circuit Number Function
1 PU/WH 632 Low Reference
2 OG 440 Battery Positive Voltage
3 PK/D-BU 539 Ignition 1 Voltage
4-6 - - Not Used
7 L-BU 380 A/C Refrigerant Pressure (ACP) Sensor Signal
8 L-BU 722 Octane Switch Signal
9 GY 121 Engine Speed Signal
10 D-GN/WH 762 A/C Request Signal
11 - - Not Used
12 D-BU 473 High Speed Cooling Fan Relay Control
13 WH/BK - Intake Manifold Tuning Valve Solenoid Control
14 PU 1807 CAN Serial Data High
15 PU 2000 Keyword Serial Data
16 - - Not Used
17 GY 605 5-Volt Reference
18 OG 440 Battery Positive Voltage
19 GY 1936 Fuel Gage
20-21 - - Not Used
22 PU 723 Octane Switch Signal
23 D-GN/WH 817 Vehicle Speed Signal (Manual Transmission)
24 D-GN 135 Engine Coolant (ECT) Sensor Gage Signal
25 - - Not Used
26 D-GN/WH 465 Fuel Pump Relay Control
27 D-GN/WH 335 Low Speed Cooling Fan Relay Control
28 D-GN 67 A/C Compressor Clutch Coil Supply Voltage
29 - - Not Used
30 YE 710 CAN Serial Data Low
31 WH 30 Fuel Level Sensor Signal
32 BN/WH 419 Malfunction Indicator Lamp (MIL) Control
Factory Service Tools

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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.

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