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.
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HOMESERVICE MANUALSCHEVROLET2005OPTRA (CANADA) L4-2.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTUNE-UP AND ENGINE PERFORMANCE CHECKSIDLE SPEEDTESTING AND INSPECTION
2005 Chevrolet Optra (CANADA) L4-2.0L
Idle Speed: Testing and Inspection
2005 Chevrolet Optra (CANADA) L4-2.0LSECTION Testing and Inspection
Throttle/Idle Learn
The Idle Learn Procedure listed below must be performed whenever the following occurs:
* The throttle body assembly is replaced
* The throttle body is cleaned
* The engine control module (ECM) is replaced
* The idle air control valve (IAC) is replaced
* Power disconnection (battery cable, ECM fuse, etc.) (Delphi ECM only)
1. Turn the ignition ON.
2. Turn the ignition OFF for 15 seconds.
3. Turn the ignition ON for 5 seconds.
4. Turn the ignition OFF for 15 seconds.
5. Start the engine in park/neutral.
6. Allow the engine to run until the engine coolant temperature is greater than 85°C (185°F).
7. Turn the A/C ON for 10 seconds, if equipped.
8. If the vehicle is equipped with an automatic transaxle, apply the parking brake. While pressing the brake pedal, place the transaxle in drive (D) for 10 seconds.
9. Turn the A/C OFF for 10 seconds, if equipped.
10. If the vehicle is equipped with an automatic transaxle, while pressing the brake pedal, place the transaxle in park/neutral.
11. Turn the ignition OFF. The idle learn procedure is complete.
RENDER: 1.0x
NO RELATED
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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.