Idle Speed Inspection - Honda Accord 2008 Manual

07/11/02 09:17:49 61TA0000_110_0342
Idle Control System

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
– Spark plugs
– 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.
2. Connect the HDS to the data link connector (DLC)
(A) located under the driver's side of the dashboard.
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3. Make sure the HDS communicates with the ECM/
PCM. If it doesn't, go to the DLC circuit
troubleshooting (see page 11-208).
11-342
A
4. Start the engine. Hold the engine speed at
3,000 rpm without load (A/T 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 air
conditioner off.
Idle speed should be:
M/T 780 50 rpm ±
A/T 800 50 rpm (in P or N) ±
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 be:
M/T 780 50 rpm ±
A/T 800 50 rpm (in P or N) ±
NOTE: If the idle speed is not within specification,
do the ECM/PCM idle learn procedure (see page
11-343). If the idle speed is still not within
specification, go to symptom troubleshooting.
7. Reconnect the EVAP canister purge valve
connector.
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