2006 Chevrolet Optra LS, AutomaticFACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) 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 GY 417 Throttle Position (TP) Sensor Signal
8 D-GN/BK 1746 Fuel Injector 3 Control
9 YE/D-BU 1744 Fuel Injector 1 Control
10 BK/WH 252 Low Reference
11 L-GN 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 D-GN/WH 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 WH 428 Evaporative Emissions (EVAP) Canister Purge Solenoid Control
21 D-BU/WH 1869 Crankshaft Position (CKP) Sensor Signal
22 BN/WH 1745 Fuel Injector 2 Control
23 GY 472 Intake Air Temperature (IAT) Sensor 5-Volt Reference
24 D-BU/WH 432 Manifold Absolute Pressure (MAP) Sensor Signal
25 PU 633 Camshaft Position (CMP) Sensor Signal
26 D-GN/WH 844 Injector 4 Signal
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 BN/BK 1688 5-Volt Reference Voltage
32 D-BU/WH 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 - - Not Used
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 L-GN 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
Engine Control Module (ECM) K (MR-140)

GM1466972Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • AMP 0-368434-2
  • 64-Way F ECU 64P Conn Ass'y (32-bit-B)
Pin Wire Color Circuit Number Function
1 OG 440 Battery Positive Voltage
2-4 - - Not Used
5 BK/WH 51 Ground
6 D-GN/WH 817 Vehicle Speed Signal (Manual Transmission)
7 D-BU 876 Rough Road Signal - W/ABS
8-11 - - Not Used
12 D-BU 473 High Speed Cooling Fan Relay Control
13 - - Not Used
14 PU 1807 CAN Serial Data High
15 YE 710 CAN Serial Data Low
16 BN/WH 1669 Heated Oxygen Sensor (HO2S) 1 Heater Control
17 OG 440 Battery Positive Voltage
18 PK/BU 539 Ignition 1 Voltage
19-20 - - Not Used
21 D-GN 602 Rough Road Sensor Signal
22 L-BU 380 A/C Refrigerant Pressure (ACP) Sensor Signal
23 - - Not Used
24 D-GN 135 Engine Coolant Temperature (ECT) Sensor Gage Signal
25 GY 121 Engine Speed Signal
26-27 - - Not Used
28 D-GN/WH 335 Low Speed Cooling Fan Relay Control
29 D-GN 67 A/C Compressor Clutch Coil Supply Voltage
30 WH 30 Fuel Level Sensor Signal
31 - - Not Used
32 PU 2000 Keyword Serial Data
33 - - Not Used
34 PU/WH 632 Low Reference
35 D-GN/WH 762 A/C Request Signal
36 PU 1670 Heated Oxygen Sensor (HO2S) 2 Signal
37-49 - - Not Used
50 GY 605 5-Volt Reference
51 GY 1936 Fuel Level Sensor Signal
52 YE/D-GN 890 Fuel Tank Pressure Sensor Signal
53 L-GN 413 Heated Oxygen Sensor (HO2S) 2 Low Reference
54 L-GN 465 Fuel Pump Relay Control
55-63 - - Not Used
64 BN/WH 419 Malfunction Indicator Lamp (MIL) Control
Engine Control Module (ECM) M (MR-140)

GM1501851Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • AMP 1-368434-1
  • 64-Way F ECU 64P Conn Ass'y (32-bit-B)
Pin Wire Color Circuit Number Function
1 L-BU 406 Ignition Coil (IC) Timing Control 1 and 4
2 BN/BK 1671 Heated Oxygen Sensor (HO2S) 2 Heater Control
3 GY 120 Fuel Pump Supply Voltage
4 WH 428 Evaporative Emissions (EVAP) Canister Purge Solenoid Control
5 YE/BK 1868 Low Reference
6 GY 417 Throttle Position (TP) Sensor Signal
7 GY 472 Intake Air Temperature (IAT) Sensor Signal
8 D-BU/WH 432 Manifold Absolute Pressure (MAP) Sensor Signal
9 WH/BK 1456 Exhaust Gas Recirculation (EGR) Valve Position Signal
10 - - Not Used
11 D-GN/WH 844 Fuel Injector 4 Control
12 GY 1653 Heated Oxygen Sensor (HO2S) 1 Signal
13 BN 1747 Idle Air Control (IAC) A High Control
14 WH 444 Idle Air Control (IAC) B Low Control
15 YE/WH 1748 Idle Air Control (IAC) A Low Control
16 L-BU/BK 1688 5-Volt Reference
17 - - Not Used
18 YE/BK 496 Knock Sensor Signal
19 D-GN 435 Exhaust Gas Recirculation (EGR) Solenoid Low Control
20 - - Not Used
21 D-BU/WH 1869 Crankshaft Position (CKP) Sensor Signal
22 BN/WH 1745 Fuel Injector 2 Control
23 - - Not Used
24 D-GN/BK 1746 Fuel Injector 3 Control
25 YE/D-BU 1744 Fuel Injector 1 Control
26 PU 633 Camshaft Position (CMP) Sensor Signal
27 - - Not Used
28 L-GN 410 Engine Coolant Temperature (ECT) Sensor Signal
29 D-GN/RD 1665 Heated Oxygen Sensor (HO2S) 1 Low Reference
30 PU/WH 1749 Idle Air Control (IAC) Coil B High Control
31 - - Not Used
32 D-GN/WH 416 5-Volt Reference
33 L-BU 406 Ignition Coil (IC) Timing Control (1 and 4)
34 - - Not Used
35 D-GN/WH 423 Ignition Coil (IC) Timing Control (2 and 3)
36 - - Not Used
37 BK/WH 51 Ground
38 BK/WH 51 Ground
39 BK/WH 51 Ground
40 BK/WH 51 Ground
41 BK/WH 51 Ground
42-47 - - Not Used
48 OG/BK 469 Low Reference
49-50 - - Not Used
51 D-GN/WH 423 Ignition Coil (IC) Timing Control (2 and 3)
52 D-GN 435 Exhaust Gas Recirculation (EGR) Low Control
53-63 - - Not Used
64 BK 808 Low Reference
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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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