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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, and there are no DTCs.
    • Ignition timing
    • Sparkplugs
    • Air cleaner
    • PCV system
  • Apply the parking brake, and make sure the headlights are off.
  1. Disconnect the evaporative emission (EVAP) canister purge valve connector (see step 1 on EVAP CANISTER FILTER REPLACEMENT ).
  2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
    Fig 1: Identifying Data Link Connector (DLC)
    G06950029Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Make sure the HDS communicates with the ECM/PCM. If it doesn't, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
  4. Start the engine. Hold the engine speed at 3, 000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
  5. Check the idle speed without load conditions: headlights, blower fan, radiator fan, and A/C off.

    Idle speed should be: 

    IDLE SPEED REFERENCE

    CVT 750 ± 50 rpm (in P or N)
    M/T 750 ± 50 rpm
    NOTE: Check the state-of-charge (SOC) in the IMA system DATA LIST with the HDS. If the IMA battery charge level is less than 30%, start the engine, and hold it between 3, 500-4, 000 rpm without load (CVT in P or N, M/T in neutral) until the SOC indicator displays at least half of its segments.
  6. Let the engine idle for 1 minute with high electric load (A/C switch on, temperature set to max cool, blower fan on high, and headlights on high beam).

    Idle speed should he: 

    IDLE SPEED REFERENCE

    CVT 750 ± 50 rpm (in P or N)
    M/T 750 ± 50 rpm
    NOTE:
    • Check the state-of-charge (SOC) in the IMA system DATA LIST with the HDS. If the IMA battery charge level is less than 30%, start the engine, and hold it between 3, 500-4, 000 rpm without load (CVT in P or N, M/T in neutral) until the SOC indicator displays at least half of its segments.
    • If the idle speed is not within specification, do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE  ). If the idle speed is still not within specification, go to the Symptom Troubleshooting Index (see SYMPTOM TROUBLESHOOTING INDEX ).
  7. Reconnect the EVAP canister purge valve connector.
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