Idle Speed Inspection

NOTE:
  • Leave the Idle Air Control (IAC) valve connected.
  • 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

1.Disconnect the Evaporative Emission (EVAP) canister purge valve 2P connector.

2.Connect a tachometer (A) to the test tachometer connector (B).

 


3.Start the engine. Hold the engine at 3,000 rpm (min-1) with no load (in Park or neutral) until the radiator fan comes on, then let it idle.

4.Check the idle speed with no-load conditions: headlights, blower fan, rear defogger, radiator fan, and air conditioner are not operating.

Idle speed should be:
M/T 650±50 rpm (min-1) 
A/T 650±50 rpm (min-1) (in Park or neutral) 

5.Idle the engine for 1 minute with heater fan switch on HI and air conditioner on, then check the idle speed.

Idle speed should be:
M/T 700±50 rpm (min-1) 
A/T 700±50 rpm (min-1) (in Park or neutral) 

NOTE: If the idle speed is not within specification, go to the Symptom Troubleshooting Index.

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

NOTE: You can use the scan tool or Honda PGM Tester to inspect idle speed.