Thanks for your response. Your Sequoia sounds very logical.
In the Sienna, the rear control is not a button, but a setting on the
rear fan speed knob (the settings are OFF, REAR, LOW,MED, HIGH). How it
works now is that you can turn this knob and control the fan speed of
the rear climate system. If you select the "REAR" setting, the only way
to control the fan speed of the rear system is to use the rear, ceiling
mounted controls. That's cool.
My beef with this is that you can't control the temperature of the rear
air system or even whether it is a/c or heat, vent or floor registers
from the front controls. You can only control the fan speed from the
front. This seems wrong to me. I would like to think that when the knob
is set to REAR, you can control everything with the rear
ceiling-mounted controls. BUT, if it is not set to REAR, you can
control everything from the front.
Please, could anyone with a Sienna chime in here? Is there something
wrong with my van?