Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Control Module Connector End Views (Hatchback)
2008 Chevrolet Aveo LT, AutomaticSECTION Engine Control Module Connector End Views (Hatchback)
Engine Control Module (ECM) K (MR140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | RD/WH | - | Battery Positive Voltage |
| 2-4 | - | - | Not Used |
| 5 | GY | - | Octane Selector Switch Signal |
| 6 | D-GN/WH | - | Vehicle Speed Signal |
| 7 | BN | - | Rough Road Signal w/ABS |
| 8-11 | - | - | Not Used |
| 12 | GY | - | High Speed Cooling Fan Relay Control |
| 13 | YE | - | Intake Manifold Tuning Valve Control |
| 14 | PU | - | CAN Serial Data High |
| 15 | YE | - | CAN Serial Data Low |
| 16 | BK | - | Heated Oxygen Sensor 1 Heater Control |
| 17 | RD/WH | - | Battery Positive Voltage |
| 18 | PK | - | Ignition 1 Voltage |
| 19-20 | - | - | Not Used |
| 21 | D-GN | - | Rough Road Signal w/o ABS |
| 22 | L-BU | - | Air Conditioning Refrigerant Pressure Switch Signal |
| 23 | - | - | Not Used |
| 24 | GN | - | Engine Coolant Temperature Gage Control |
| 25 | WH | - | Engine Speed Signal |
| 26-27 | - | - | Not Used |
| 28 | GN | - | Low Speed Cooling Fan Relay Control |
| 29 | PU/WH | - | Air Conditioning Compressor Clutch Relay Control |
| 30 | PU | - | Fuel Gage Control |
| 31 | - | - | Not Used |
| 32 | BK/WH | - | Serial Data |
| 33 | - | - | Not Used |
| 34 | L-BU | - | Low Reference |
| 35 | D-GN/WH | - | Air Conditioning Request Signal |
| 36 | BN | - | Heated Oxygen Sensor 2 Signal |
| 37-49 | - | - | Not Used |
| 50 | OG/BK | - | 5-Volt Reference |
| 51 | GY | - | Fuel Level Sensor Signal |
| 52 | - | - | Not Used |
| 53 | PU | - | Heated Oxygen Sensor 2 Low Reference |
| 54 | L-GN | - | Fuel Pump Relay Control |
| 55-63 | - | - | Not Used |
| 64 | BN/WH | - | Malfunction Indicator Lamp Control |
Engine Control Module (ECM) M (MR140)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | WH | - | Ignition Coil 2 and 3 Control |
| 2 | BN | - | Heated Oxygen Sensor 2 Heater Control |
| 3 | PK | - | Ignition 1 Voltage |
| 4 | BN | - | EVAP Canister Purge Solenoid Control |
| 5 | YE/BK | - | Low Reference |
| 6 | L-BU | - | Throttle Position Sensor Signal |
| 7 | BN | - | Intake Air Temperature (IAT) Sensor Signal |
| 8 | L-GN | - | Exhaust Gas Recirculation (EGR) Valve Signal |
| 9 | GY | - | Exhaust Gas Recirculation (EGR) Valve Position Sensor Signal |
| 10 | - | - | Not Used |
| 11 | PU/D-BU | - | Fuel Injector #4 Control |
| 12 | GN/WH | - | Heated Oxygen Sensor 1 Low Reference |
| 13 | GN | - | High Idle Switch Output |
| 14 | PK/D-BU | - | Idle Air Control (IAC) Valve Coil B Low Control |
| 15 | L-GN/BK | - | Idle Air Control (IAC) Valve Coil A Low Control |
| 16 | PU | - | 5-Volt Reference |
| 17 | - | - | Not Used |
| 18 | D-BU | - | Knock Sensor Signal |
| 19 | WH | - | Exhaust Gas Recirculation Valve Control |
| 20 | - | - | Not Used |
| 21 | D-BU/WH | - | Crankshaft Position Sensor Signal |
| 22 | BN | - | Fuel Injector #2 Control |
| 23 | - | - | Not Used |
| 24 | L-GN/D-BU | - | Fuel Injector #3 Control |
| 25 | D-BU/WH | - | Fuel Injector #1 Control |
| 26 | L-BU/BK | - | Camshaft Position Sensor Signal |
| 27 | - | - | Not Used |
| 28 | YE | - | Engine Coolant Temperature Sensor Signal |
| 29 | BN | - | Heated Oxygen Sensor 1 Signal |
| 30 | BU | - | Idle Air Control (IAC) Valve Coil B High Control |
| 31 | - | - | Not Used |
| 32 | PK | - | 5-Volt Reference |
| 33 | WH | - | Ignition Coil 2 and 3 Control |
| 34 | - | - | Not Used |
| 35 | OG | - | Ignition Coil 1 and 4 Control |
| 36 | - | - | Not Used |
| 37 | BK | - | Ground |
| 38 | BK | - | Ground |
| 39 | BK | - | Ground |
| 40 | BK | - | Ground |
| 41 | BK | - | Ground |
| 42-47 | - | - | Not Used |
| 48 | BN/WH | - | Low Reference |
| 49-50 | - | - | Not Used |
| 51 | OG | - | Ignition Coil 1 and 4 Control |
| 52 | WH | - | Exhaust Gas Recirculation Valve Control |
| 53-63 | - | - | Not Used |
| 64 | BN | - | Low Reference |
Engine Control Module (ECM) C (MT34)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | GY | - | 5-Volt Reference 2 |
| 2 | OG/BK | - | 5-Volt Reference |
| 3 | BN | - | Low Reference |
| 4 | L-BU | - | Low Reference |
| 5 | L-BU | - | Low Reference |
| 6 | GY | - | 5-Volt Reference 1 |
| 7-8 | - | - | Not Used |
| 9 | WH | - | Low Reference |
| 10-11 | - | - | Not Used |
| 12 | OG/BK | - | Ignition 1 Voltage |
| 13 | OG/BK | - | Ignition 1 Voltage |
| 14 | - | - | Not Used |
| 15 | L-BU | - | CPP Switch Signal (M/T) |
| 16 | - | - | Not Used |
| 17 | RD/WH | - | Battery Positive Voltage |
| 18 | RD/WH | - | Battery Positive Voltage |
| 19 | BK/WH | - | Ground |
| 20 | BK/WH | - | Ground |
| 21 | BK/WH | - | Ground |
| 22 | BK/WH | - | Ground |
| 23-24 | - | - | Not Used |
| 25 | D-GN/WH | - | A/C Request Signal |
| 26 | L-BU | - | Stop Lamp Switch Output |
| 27 | - | - | Not Used |
| 28 | PU | - | Stop Lamp Switch Output |
| 29 | D-BU | - | APP Sensor 2 Signal |
| 30 | L-BU | - | A/C Pressure Sensor Signal |
| 31 | BK/WH | - | Serial Data |
| 32 | - | - | Not Used |
| 33 | PK | - | Ignition 1 Voltage |
| 34 | D-BU | - | High Speed Cooling Fan Relay Control |
| 35 | PU/WH | - | A/C Clutch Relay Control |
| 36 | BN | - | Main Relay Control |
| 37 | YE | - | Cruise Indicator Control |
| 38 | D-GN | - | Vehicle Speed Signal (M/T) |
| 39-40 | - | - | Not Used |
| 41 | GY | - | Engine Speed Signal |
| 42 | L-GN | - | Fuel Pump Relay Control |
| 43 | GY | - | Fuel Level Sensor Signal |
| 44 | L-BU | - | APP Sensor 1 Signal |
| 45 | GY | - | Cruise Control Switch Signal |
| 46 | PU | - | CAN Serial Data High |
| 47 | BN/BK | - | Fuel Tank Pressure Sensor Signal |
| 48 | D-GN | - | Rough Road Sensor Signal w/o ABS |
| 49 | BN/WH | - | MIL Control |
| 50 | GY/D-GN | - | Low Speed Cooling Fan Relay Control |
| 51-55 | - | - | Not Used |
| 56 | D-GN | - | Engine Coolant Temperature Gage Control |
| 57 | BN | - | Heated Oxygen Sensor (HO2S) 2 Heater Control |
| 58-60 | - | - | Not Used |
| 61 | WH | - | Fuel Gage Control |
| 62 | BN | - | Heated Oxygen Sensor (HO2S) 2 Signal |
| 63 | YE | - | CAN Serial Data Low |
| 64 | BN | - | Rough Road Signal w/ABS |
Engine Control Module (ECM) E (MT34)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1-2 | - | - | Not Used |
| 3 | WH | - | Ignition Coil (IC) Timing Control 2 and 3 |
| 4 | OG | - | Ignition Coil (IC) Timing Control 1 and 4 |
| 5-6 | - | - | Not Used |
| 7 | D-BU | - | Intake Manifold Tuning Valve Sensor Signal |
| 8 | YE | - | Intake Manifold Tuning Valve Control |
| 9-14 | - | - | Not Used |
| 15 | BN | - | Electronic Throttle Control (ETC) (-) |
| 16 | BN | - | Electronic Throttle Control (ETC) (-) |
| 17-18 | - | - | Not Used |
| 19 | WH | - | Ignition Coil (IC) Timing Control 2 and 3 |
| 20 | OG | - | Ignition Coil (IC) Timing Control 1 and 4 |
| 21 | L-BU | - | Low Reference |
| 22 | D-BU | - | Knock Sensor Signal |
| 23-24 | - | - | Not Used |
| 25 | YE | - | Engine Coolant Temperature (ECT) Sensor Signal |
| 26 | BN | - | Heated Oxygen Sensor (HO2S) 1 Low Signal |
| 27 | - | - | Not Used |
| 28 | L-GN | - | Manifold Absolute Pressure (MAP) Sensor Signal |
| 29 | PU | - | Throttle Position (TP) Sensor 2 Signal |
| 30 | BN | - | Intake Air Temperature (IAT) Sensor Signal |
| 31 | BN | - | Electronic Throttle Control (ETC) (+) |
| 32 | BN | - | Electronic Throttle Control (ETC) (+) |
| 33 | PU | - | 5-Volt Reference |
| 34 | D-GN/WH | - | Heated Oxygen Sensor (HO2S) 1 Low Reference |
| 35 | BN/WH | - | Low Reference |
| 36 | D-BU/WH | - | Crankshaft Position (CKP) Sensor Signal |
| 37 | YE/BK | - | Low Reference |
| 38-40 | - | - | Not Used |
| 41 | L-BU | - | Throttle Position (TP) Sensor 1 Signal |
| 42 | GY | - | Exhaust Gas Recirculation (EGR) Valve Position Sensor Signal |
| 43-45 | - | - | Not Used |
| 46 | L-BU/BK | - | Camshaft Position (CMP) Sensor Signal |
| 47-48 | - | - | Not Used |
| 49 | GY | - | Heated Oxygen Sensor (HO2S) 1 Heater Control |
| 50 | PU | - | 5-Volt Reference |
| 51 | BN | - | Low Reference |
| 52 | D-BU | - | Low Reference |
| 53 | WH | - | Exhaust Gas Recirculation (EGR) Solenoid Valve Control |
| 54 | OG | - | Ignition 1 Voltage |
| 55 | BN | - | Fuel Injector 3 Control |
| 56 | L-GN | - | Fuel Injector 2 Control |
| 57-60 | - | - | Not Used |
| 61 | YE | - | Evaporative Emissions (EVAP) Canister Vent Solenoid Control |
| 62 | WH | - | Evaporative Emissions (EVAP) Canister Purge Solenoid Control |
| 63 | YE | - | Fuel Injector 1 Control |
| 64 | BN/WH | - | Fuel Injector 4 Control |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.