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SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2005OPTRA5 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - 1.8L (L79) - INTRODUCTION AND MECHANICAL REPAIRSCOMPONENT LOCATORENGINE CONTROLS CONNECTOR END VIEWS
2005 Chevrolet Optra5 Base, Standard
Engine Controls Connector End Views
2005 Chevrolet Optra5 Base, StandardSECTION Engine Controls Connector End Views
Camshaft Position (CMP) Sensor (HV-240)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | PK/BK | 1846 | Ignition 1 Voltage |
| 2 | BN/WH | 252 | Low Reference |
| 3 | PU | 633 | Camshaft Position (CMP) Sensor Signal |
Camshaft Position (CMP) Sensor (MR-140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | PK/BK | 1846 | Ignition 1 Voltage |
| 2 | BN/WH | 251 | Ground |
| 3 | PU | 633 | Camshaft Position (CMP) Sensor Signal |
Crankshaft Position (CKP) Sensor
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | D-BU/WH | 1869 | Crankshaft Position (CKP) Sensor Signal |
| 2 | YE/BK | 1868 | Low Reference |
| 3 | BK/WH | 51 | Ground |
Engine Coolant Temperature (ECT) Sensor
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | L-GN | 410 | Engine Coolant Temperature (ECT) Sensor Signal |
| 2 | BK | 808 | Low Reference |
Evaporative Emission (EVAP) Canister Purge Solenoid Valve
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | PK/BK | 1846 | Ignition 1 Voltage |
| 2 | WH | 428 | Evaporative Emission (EVAP) Canister Purge Solenoid Control |
Exhaust Gas Recirculation (EGR) Valve (MR-140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | D-GN | 435 | Exhaust Gas Recirculation (EGR) Solenoid Low Control |
| 2 | OG/BK | 469 | Low Reference |
| 3 | WH/BK | 1456 | Exhaust Gas Recirculation (EGR) Valve Position Signal |
| 4 | L-BU/BK | 1688 | 5 Volt Reference |
| 5 | GY | 120 | Fuel Pump Supply Voltage |
Exhaust Gas Recirculation (EGR) Valve (HV-240)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | PK | 139 | Ignition 1 Voltage |
| 2 | D-GN | 411 | Exhaust Gas Recirculation (EGR) Valve Control |
Fuel Injector 1
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | YE/BU | 1744 | Fuel Injector 1 Control |
| 2 | PK | 139 | Ignition 1 Voltage |
Fuel Injector 2
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | BN/WH | 1745 | Fuel Injector 2 Control |
| 2 | PK | 139 | Ignition 1 Voltage |
Fuel Injector 3
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | D-GN/BK | 1746 | Fuel Injector 3 Control |
| 2 | PK | 139 | Ignition 1 Voltage |
Fuel Injector 4
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | D-GN/WH | 844 | Fuel Injector 4 Control |
| 2 | PK | 139 | Ignition 1 Voltage |
Fuel Pump
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | D-BU | 1936 | Fuel Level Sensor Signal |
| 2 | BK | 1250 | Ground |
| 3 | GY | 120 | Fuel Pump Supply Voltage |
| 4 | BK | 1250 | Ground |
| 5 | PU | 172 | Low Fuel Indicator Control |
| 6 | PU/BK | 632 | Low Reference |
Heated Oxygen Sensor 1 (HO2S) 1 (MR-140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | D-GN/RD | 1665 | Heated Oxygen Sensor (HO2S) 1 Low Reference |
| 2 | PK/BK | 1846 | Ignition 1 Voltage |
| 3 | GY | 1653 | Heated Oxygen Sensor (HO2S) 1 Signal |
| 4 | BN/WH | 1669 | Heated Oxygen Sensor (HO2S) 1 Heater Control |
Heated Oxygen Sensor 2 (HO2S2) (MR-140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | PK/BK | 1846 | Ignition 1 Voltage |
| 2 | PU | 1670 | Heated Oxygen Sensor (HO2S) 2 Signal |
| 3 | BN/BK | 1671 | Heated Oxygen Sensor (HO2S) 2 Heater Control |
| 4 | L-GN | 413 | Heated Oxygen Sensor (HO2S) 2 Low Reference |
Idle Air Control (IAC) Valve
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| A | WH | 444 | Idle Air Control (IAC) Coil B Low Control |
| B | PU/WH | 1749 | Idle Air Control (IAC) Coil B High Control |
| C | YE/WH | 1748 | Idle Air Control (IAC) Coil A Low Control |
| D | BN | 1747 | Idle Air Control (IAC) Coil A High Control |
Ignition Coil (IC) Module
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | D-GN/WH | 423 | Ignition Coil (IC) Timing Control (2 and 3) |
| 2 | PK | 739 | Ignition 1 Voltage |
| 3 | L-BU | 406 | Ignition Coil (IC) Timing Control (1 and 4) |
Intake Air Temperature (IAT) Sensor
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | BK | 808 | Low Reference |
| 2 | GY | 472 | Intake Air Temperature (IAT) Sensor Signal |
Knock Sensor (KS)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | YE/BK | 496 | Knock Sensor (KS) Signal |
| 2 | D-BU/WH | 808 | Low Reference |
| 3 | BK/WH | 51 | Ground |
Manifold Absolute Pressure (MAP) Sensor
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | L-BU/BK | 1688 | 5 Volt Reference |
| 2 | D-BU/WH | 432 | Manifold Absolute Pressure (MAP) Sensor Signal |
| 3 | OG/BK | 469 | Low Reference |
Octane Selection Switch (HV-240)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | PU | 723 | Octane Switch Signal |
| 2 | BK/WH | 51 | Ground |
| 3 | L-BU | 722 | Octane Switch Signal |
Oxygen (O2) Sensor (HV-240)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | GY | 1653 | Oxygen (O2) Sensor Signal |
| 2 | D-GN/RD | 1665 | Oxygen (O2) Sensor Low Reference |
Rough Road Sensor (MR-140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| A | GY | 605 | 5 Volt Reference |
| B | D-GN | 602 | Rough Road Sensor Signal |
| C | PU/WH | 632 | Low Reference |
Throttle Position (TP) Sensor
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| 1 | BK | 808 | Low Reference |
| 2 | D-GN/WH | 416 | 5 Volt Reference |
| 3 | GY | 417 | Throttle Position (TP) Sensor Signal |
Engine Control Module (ECM) A (HV-240)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| A1 | BK/WH | 51 | Ground |
| A2 | BK/WH | 51 | Ground |
| A3 | YE/BK | 496 | Knock Sensor Signal |
| A4 | D-GN | 411 | Exhaust Gas Recirculation (EGR) Valve Control |
| A5 | - | - | Not Used |
| A6 | YE/BK | 1868 | Low Reference |
| A7 | GY | 417 | Throttle Position (TP) Sensor Signal |
| A8 | D-GN/BK | 1746 | Fuel Injector 3 Control |
| A9 | YE/D-BU | 1744 | Fuel Injector 1 Control |
| A10 | BK/WH | 252 | Low Reference |
| A11 | L-GN | 410 | Engine Coolant Temperature (ECT) Sensor Signal |
| A12 | D-GN/RD | 1665 | Oxygen (O2) Sensor 1 Low Reference (Unleaded Only) |
| A13 | PU/WH | 1749 | Idle Air Control (IAC) Coil B High Control |
| A14 | - | - | Not Used |
| A15 | D-GN/WH | 416 | 5-Volt Reference |
| A16 | OG/BK | 469 | Low Reference |
| A17 | BK/WH | 51 | Ground |
| A18 | L-BU | 406 | Ignition Coil (IC) 1 and 4 Control |
| A19 | D-GN/WH | 423 | Ignition Coil (IC) 2 and 3 Control |
| A20 | WH | 428 | Evaporative Emissions (EVAP) Canister Purge Solenoid Control |
| A21 | D-BU/WH | 1869 | Crankshaft Position (CKP) Sensor Signal |
| A22 | BN/WH | 1745 | Fuel Injector 2 Control |
| A23 | GY | 472 | Intake Air Temperature (IAT) Sensor 5-Volt Reference |
| A24 | D-BU/WH | 432 | Manifold Absolute Pressure (MAP) Sensor Signal |
| A25 | PU | 633 | Camshaft Position (CMP) Sensor Signal |
| A26 | D-GN/WH | 844 | Injector 4 Signal |
| A27 | GY | 1653 | Oxygen (O2) Sensor 1 Signal (Unleaded Only) |
| A28 | BN | 1747 | Idle Air Control (IAC) Coil A High Control |
| A29 | WH | 444 | Idle Air Control (IAC) B Low Control |
| A30 | YE/WH | 1748 | Idle Air Control (IAC) A Low Control |
| A31 | BN/BK | 1688 | 5-Volt Reference Voltage |
| A32 | BY/WH | 808 | Low Reference |
Engine Control Module (ECM) B (HV-240)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| B1 | PU/WH | 632 | Low Reference |
| B2 | OG | 440 | Battery Positive Voltage |
| B3 | PK/D-BU | 539 | Ignition 1 Voltage |
| B4-B6 | - | - | Not Used |
| B7 | L-BU | 380 | A/C Refrigerant Pressure (ACP) Sensor Signal |
| B8 | L-BU | 722 | Octane Switch Signal |
| B9 | GY | 121 | Engine Speed Signal |
| B10 | D-GN/WH | 762 | A/C Request Signal |
| B11 | - | - | Not Used |
| B12 | D-BU | 473 | High Speed Cooling Fan Relay Control |
| B13 | - | - | Not Used |
| B14 | PU | 1807 | CAN Serial Data High |
| B15 | PU | 2000 | Keyword Serial Data |
| B16 | - | - | Not Used |
| B17 | GY | 605 | 5-Volt Reference |
| B18 | OG | 440 | Battery Positive Voltage |
| B19 | GY | 1936 | Fuel Gage |
| B20-B21 | - | - | Not Used |
| B22 | PU | 723 | Octane Switch Signal |
| B23 | D-GN/WH | 817 | Vehicle Speed Signal (Manual Transmission) |
| B24 | D-GN | 135 | Engine Coolant (ECT) Sensor Gage Signal |
| B25 | - | - | Not Used |
| B26 | L-GN | 465 | Fuel Pump Relay Control |
| B27 | D-GN/WH | 335 | Low Speed Cooling Fan Relay Control |
| B28 | D-GN | 67 | A/C Compressor Clutch Coil Supply Voltage |
| B29 | - | - | Not Used |
| B30 | YE | 710 | CAN Serial Data Low |
| B31 | WH | 30 | Fuel Level Sensor Signal |
| B32 | BN/WH | 419 | Malfunction Indicator Lamp (MIL) Control |
Engine Control Module (ECM) K (MR-140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| K1 | OG | 440 | Battery Positive Voltage |
| K2-K4 | - | - | Not Used |
| K5 | BK/WH | 51 | Ground |
| K6 | D-GN/WH | 817 | Vehicle Speed Signal (Manual Transmission) |
| K7 | D-BU | 876 | Rough Road Signal - W/ABS |
| K8-K11 | - | - | Not Used |
| K12 | D-BU | 473 | High Speed Cooling Fan Relay Control |
| K13 | - | - | Not Used |
| K14 | PU | 1807 | CAN Serial Data High |
| K15 | YE | 710 | CAN Serial Data Low |
| K16 | BN/WH | 1669 | Heated Oxygen Sensor (HO2S) 1 Heater Control |
| K17 | OG | 440 | Battery Positive Voltage |
| K18 | PK/BN | 539 | Ignition 1 Voltage |
| K19-K20 | - | - | Not Used |
| K21 | D-GN | 602 | Rough Road Sensor Signal |
| K22 | L-BU | 380 | A/C Refrigerant Pressure (ACP) Sensor Signal |
| K23 | - | - | Not Used |
| K24 | D-GN | 135 | Engine Coolant Temperature (ECT) Sensor Gage Signal |
| K25 | GY | 121 | Engine Speed Signal |
| K26-K27 | - | - | Not Used |
| K28 | D-GN/WH | 335 | Low Speed Cooling Fan Relay Control |
| K29 | D-GN | 67 | A/C Compressor Clutch Coil Supply Voltage |
| K30 | WH | 30 | Fuel Level Sensor Signal |
| K31 | - | - | Not Used |
| K32 | PU | 2000 | Keyword Serial Data |
| K33 | - | - | Not Used |
| K34 | PU/BK | 632 | Low Reference |
| K35 | D-GN/WH | 762 | A/C Request Signal |
| K36 | PU | 1670 | Heated Oxygen Sensor (HO2S) 2 Signal |
| K37-K49 | - | - | Not Used |
| K50 | GY | 605 | 5-Volt Reference |
| K51 | GY | 1936 | Fuel Level Sensor Signal |
| K52 | YE/D-GN | 890 | Fuel Tank Pressure Sensor Signal |
| K53 | L-GN | 413 | Heated Oxygen Sensor (HO2S) 2 Low Reference |
| K54 | L-GN | 465 | Fuel Pump Relay Control |
| K55-K63 | - | - | Not Used |
| K64 | BN/WH | 419 | Malfunction Indicator Lamp (MIL) Control |
Engine Control Module (ECM) M (MR-140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit Number | Function |
| M1 | L-BU | 406 | Ignition Coil (IC) Timing Control 1 and 4 |
| M2 | BN/BK | 1671 | Heated Oxygen Sensor (HO2S) 2 Heater Control |
| M3 | GY | 120 | Fuel Pump Supply Voltage |
| M4 | WH | 428 | Evaporative Emissions (EVAP) Canister Purge Solenoid Control |
| M5 | YE/BK | 1868 | Low Reference |
| M6 | GY | 417 | Throttle Position (TP) Sensor Signal |
| M7 | GY | 472 | Intake Air Temperature (IAT) Sensor Signal |
| M8 | D-BU/WH | 432 | Manifold Absolute Pressure (MAP) Sensor Signal |
| M9 | WH/BK | 1456 | Exhaust Gas Recirculation (EGR) Valve Position Signal |
| M10 | - | - | Not Used |
| M11 | D-GN/WH | 844 | Fuel Injector 4 Control |
| M12 | GY | 1653 | Heated Oxygen Sensor (HO2S) 1 Signal |
| M13 | BN | 1747 | Idle Air Control (IAC) A High Control |
| M14 | WH | 444 | Idle Air Control (IAC) B Low Control |
| M15 | YE/WH | 1748 | Idle Air Control (IAC) A Low Control |
| M16 | L-BU/BK | 1688 | 5-volt Reference |
| M17 | - | - | Not Used |
| M18 | YE/BK | 496 | Knock Sensor Signal |
| M19 | D-GN | 435 | Exhaust Gas Recirculation (EGR) Solenoid Low Control |
| M20 | - | - | Not Used |
| M21 | D-BU/WH | 1869 | Crankshaft Position (CKP) Sensor Signal |
| M22 | BN/WH | 1745 | Fuel Injector 2 Control |
| M23 | - | - | Not Used |
| M24 | D-GN/BK | 1746 | Fuel Injector 3 Control |
| M25 | YE/D-BU | 1744 | Fuel Injector 1 Control |
| M26 | PU | 633 | Camshaft Position (CMP) Sensor Signal |
| M27 | - | - | Not Used |
| M28 | L-GN | 410 | Engine Coolant Temperature (ECT) Sensor Signal |
| M29 | D-GN/RD | 1665 | Heated Oxygen Sensor (HO2S) 1 Low Reference |
| M30 | PU/WH | 1749 | Idle Air Control (IAC) Coil B High Control |
| M31 | - | - | Not Used |
| M32 | D-GN/WH | 416 | 5-volt Reference |
| M33 | L-BU | 406 | Ignition Coil (IC) Timing Control (1 and 4) |
| M34 | - | - | Not Used |
| M35 | D-GN/WH | 423 | Ignition Coil (IC) Timing Control (2 and 3) |
| M36 | - | - | Not Used |
| M37 | BK/WH | 51 | Ground |
| M38 | BK/WH | 51 | Ground |
| M39 | BK/WH | 51 | Ground |
| M40 | BK/WH | 51 | Ground |
| M41 | BK/WH | 51 | Ground |
| M42-M47 | - | - | Not Used |
| M48 | OG/BK | 469 | Low Reference |
| M49-M50 | - | - | Not Used |
| M51 | D-GN/WH | 423 | Ignition Coil (IC) Timing Control (2 and 3) |
| M52 | D-GN | 435 | Exhaust Gas Recirculation (EGR) Low Control |
| M53-M63 | - | - | Not Used |
| M64 | 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.