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Idle Speed Inspection

NOTE:
  • Before checking the idle speed, check these items:
    • The malfunction indicator lamp (MIL) has not been reported on.
    • Ignition timing
    • Spark plugs
    • Air cleaner
    • PCV system
  • Apply the parking brake.
  1. Disconnect the evaporative emission (EVAP) canister purge valve connector.
  2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
    Fig 1: Connecting HDS To Data Link Connector (A) Located Under Driver'S Side Of Dashboard
    G03663809Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Turn ignition on.
  4. Make sure HDS communicates with PCM. If it doesn't, go to DLC CIRCUIT TROUBLESHOOTING .
  5. Check the idle speed without load conditions: headlights, blower fan, radiator fan, and air conditioner off.

    Idle speed should be: 

    680+/-50 RPM (in Park or neutral) 

  6. Let the engine idle 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: 

    680+/-50 RPM (in Park or neutral) 

    NOTE: If the idle speed is not within specification, do the symptom troubleshooting.
  7. Reconnect the EVAP canister purge valve connector.
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