This is the PCM Idle Learn Procedure from the service manual:
1. Make sure all electrical items (A/C, audio, rear defogger, lights,etc.) are off.
2. Start the engine, and hold it at 3,000 rpm with no load (in park or neutral) until the radiator fan comes on, or until the engine coolant temperature reaches 194 degrees F (90 degrees C).
Let the engine idle for about 5 minutes with the throttle full closed.
Note: If the radiator fan comes on, do not include it's running time in the 5 minutes.