Maintenance Required Light Re-set?

[Mr. Detail]

This post is similar but different that the one below. Just changed the oil on my wife's 2006 Sienna and I wonder if anyone can refresh my memory on the proper procedure for resetting the "Maintenance Required" light using the 9V accessory plug in gadget.

I forget if I am supposed to disconnect the battery first or turn the key to the accessory position with the 9V gadget plugged in. Let me know.

Thanx!

[typesix]

The method for my 2004 Toyota is:
1. Turn the ignition key to OFF with the odometer(not trip odometers) showing.
2. Turn ignition key to ON while pushing in the trip odometer reset button.After about 5 secs, the reading will be zero and then the light will go off.

This procedure is in the Owner's Manual.

[Mr. Detail]

Typesix, you are stating that I don't even need the 9 volt gadget to reset?
Are the model year's different with this procedure? (i.e. 2004 vs 2006)

[typesix]

No need for memory battery gadget. Read your owner's manual to find out, I don't have a 2006 Toyota.

[acg_sienna]

Originally Posted by Mr. Detail

Typesix, you are stating that I don't even need the 9 volt gadget to reset?

Right. The purpose of the 9-volt gadget you're referring to is solely to preserve system memory(s) when the main battery is removed or replaced. (You can achieve the same thing, if you're careful, by attaching a car charger to the battery cables before you disconnect them, to keep 12-14 volts in the system while the battery's out.) That memory-keeper gadget has no role in the interval-reset procedure.

Originally Posted by Mr. Detail

Are the model year's different with this procedure? (i.e. 2004 vs 2006)

Nope. 2005 is the same. (To be specific, I believe this reset procedure clears several memories in sequence, depending on how long you leave the button depressed. The oil-change interval reset is the first to occur. You can see a little visual countdown in the odometer while this is proceeding. The manual should have further details on this; I confess I haven't looked at that section for a while.)