Idle Speed Adjustment - Honda 2004 Odyssey Service Manual

Idle Speed Adjustment

Adjust the idle speed using the HDS procedure, if
possible. If not, use the following procedure:
NOTE:
• Leave the IAC valve connected.
• Before setting the idle speed, check these items:
– The MIL has not been reported on.
– Ignition timing
– Throttle cable adjustment
– Spark plugs
– Air cleaner
– PCV system
– No vacuum leaks
• On Canadian models, press the parking brake pedal.
Start the engine, then check that the headlights are
off.
1. Disconnect the EVAP canister purge valve 2P
connector.
2. Connect a tachometer.
3. Start the engine. Hold the engine at 3,000 rpm 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 window defogger,
radiator fan, and air conditioner off.
Idle speed should be:
'99-01 models: 730 50 rpm (in Park or neutral)
'02-04 models: 710 10 rpm (in Park or neutral)
5. Adjust the idle speed, if necessary, by turning the
idle adjusting screw (A) 1/4-turn clockwise or
counterclockwise.
NOTE: Do not turn the idle adjusting screw more
than 1/4-turn without checking the idle speed.
6. After turning the idle adjusting screw 1/4-turn,
check the idle speed again. If it is out of spec, turn
the idle adjusting screw 1/4-turn again.
7. Allow the engine to idle for 1 minute with the
heater fan switch at HI and air conditioner on, then
check the idle speed.
Idle speed should be:
'99-01 models: 730 50 rpm (in Park or neutral)
'02-04 models: 710 50 rpm (in Park or neutral)
NOTE:
• Do not turn the idle adjusting screw when the air
conditioner is on.
• If the idle speed is not within specification, see
the Symptom Troubleshooting Index.
8. Reconnect the EVAP canister purge valve 2P
connector.
A
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