This is just a quick reply to your question as unfortunately I don't have the time right now to find out why that second fan doesn't kick on, but you're fine. I had a 1994 Honda Accord EX with virtually the same engine and cooling system setup, and it did the same thing.
I believe (this is just a vague recollection, I lost the car over a year ago) that it does have something to do with the operation of the air conditioning system.
Keep an eye on the coolant temp though.
Last edited by hondaman : 07-22-2007 at 01:38 AM.