Checking idle speed.
Note:
- Leave the IAC valve connected.
- Before checking the idle speed, check the following:
- Does the MIL light come on?.
- Ignition timing angle
- Spark plugs
- Air purifier
- PCV system
1. Disconnect the 2-pin connector from the Fuel Vapor Filter Purge valve (EVAP).
2. Connect the tachometer (A) to the test connector (B).
3. Start the engine. Maintain RPM at 3000 rpm (min⁻¹) without load (in Park or Neutral position), until the radiator fan comes on, then let it idle.
4. Check idle speed without load: headlights, fan, rear window defroster, radiator fan and air conditioner do not work.
Idle speed should be:
| MKP | 650±50 rpm (min⁻¹) |
| Automatic transmission | 650±50 rpm (min⁻¹) (in Park or Neutral position) |
5. Let the engine run for one minute with the heater fan on (in HI position) and air conditioning, then check the idle speed.
Idle speed should be:
| MKP | 700±50 rpm (min⁻¹) |
| Automatic transmission | 700±50 rpm (min⁻¹) (in Park or Neutral position) |
Note: If the idle speed is abnormal, see table of malfunction symptoms.
Component arrangement
*: Left hand drive model shown
6. Connect the 2-pin connector to the carbon filter purge valve (EVAP).
Note: Idle speed testing can be performed using a scanner or Honda PGM tester.