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
- Sparkplugs
- Air cleaner
- PCV system
Pull the parking brake lever up. Start the engine, and make sure the headlights are off.

Disconnect the evaporative emission (EVAP) canister purge valve 2P connector.
Connect the HDS to the data link connector (DLC) (A) located under the driver's side (passenger's)* of the dashboard.
*: 2000 model

2000 model

Fig 1: Identifying Data Link Connector Location (2000 Model)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2001-2006 models

Fig 2: Identifying Data Link Connector Location (2001-2006 Model)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.

Check the idle speed without load conditions: headlights, blower fan, radiator fan, and air conditioner off.

Idle speed should be:

IDLE SPEED SPECIFICATION

M/T	900+/-50 RPM
CVT	900+/-50 RPM (in Park or neutral)

If needed, adjust the idle speed by turning the idle adjusting screw (A) 1/2-turn clockwise or counterclockwise.
NOTE:
- Do not turn the idle adjusting screw (A) more than 1/2-turn without checking the idle speed.
- Do not turn the idle adjusting screw when the air conditioner is on.

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.

Safety Warning

Idle Speed Adjustment