Idle Learn Procedure: When And How To Do It (HSN 0902-07)

IDLE LEARN PROCEDURE: WHEN AND HOW TO DO IT

TECHNICAL SERVICE BULLETIN

SERVICE INFORMATION

All Honda models with programmed fuel injection (PGM-FI) have the ability to learn and adjust the engine idle speed to optimize engine idle characteristics.

The idle learn procedure should be done whenever you do any of these actions:

• Reset, replace, unplug, or reprogram the ECM/PCM
• Disconnect or replace the battery
• Do engine work that requires R & R of the intake manifold or the throttle body

To allow the ECM/PCM adaptive idle speed system to learn and adjust the engine idle speed, here's what you do:

• Make sure all electrical items (A/C, audio unit, defogger, lights, etc.) are turned off, then start the engine.
• Let the engine reach its normal operating temperature (the cooling fans cycle twice; the coolant temperature is about 194° F).
• Let the engine idle for at least 5 minutes with the throttle fully closed and with all electrical items turned off.
• If the cooling fans cycle on while doing an adaptive idle learn, add the time the cooling fans are on to the 5 minute adaptive idle learn time.