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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 71 (IDLE CONTROL SYSTEM)IDLE SPEED INSPECTION
2002 Honda Civic Si

Idle Speed Inspection

2002 Honda Civic SiSECTION Idle Speed Inspection
WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
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.
  1. Disconnect the evaporative emission (EVAP) canister purge valve 2P 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 DLC
    G03639915Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. 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.
  4. 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) 

  5. 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.
  6. Reconnect the EVAP canister purge valve 2P connector.
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:

  • • 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.