Idle Speed: Testing and Inspection

Idle Speed Inspection

NOTE:

- 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, and make sure the headlights are off.

1. Disconnect the evaporative emission (EVAP) canister purge valve 2P connector Service and Repair.

2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.





3. Make sure the HDS communicates with the PCM. If it does not, go to the DLC circuit troubleshooting Testing and Inspection.

4. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.

5. Check the idle speed under no load conditions: headlights, blower fan, radiator fan, audio system, and air conditioner off.





6. Let the engine idle for 1 minute with high electric load (the A/C switch on, the temperature set to max cool, the blower fan on high, the rear window defogger on, and the headlights on high beam).





NOTE: If the idle speed is not within specification, do the PCM idle learn procedure PCM Idle Learn Procedure. If the idle speed is still not within specification, go to the symptom troubleshooting.

7. Reconnect the EVAP canister purge valve 2P connector.