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.
Idle Speed Inspection
- Before checking the idle speed, check these items:
- - The malfunction indicator lamp (MIL) has not been reported on and there are no DTCs.
- - Ignition timing
- - Spark plugs
- - Air cleaner
- - PCV system
- Apply the parking brake.
- Disconnect the evaporative emission (EVAP) canister purge valve 2P connector.
- Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
- Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
- Check the idle speed without load conditions: headlights, blower fan, radiator fan, and air conditioner off.
Idle speed should be: 730+/-50 rpm (in Park or neutral)
- Let the engine idle for 1 minute with high electric load (A/C switch ON, temperature set to MAX Cool, blower fan on High, rear window defogger ON, and headlights on high beam).
Idle speed should be: 730+/-50 rpm (in Park or neutral)
NOTE: If the idle speed is not within specification, do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ). If no change in idle speed, go to the symptom troubleshooting. - Reconnect the EVAP canister purge valve 2P connector.
Use the Manual With the Right Hardware
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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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