On Mon, 02 Apr 2007 03:03:20 GMT, "kimjrocks" wrote:
>What the heck is the function of the ECT button on my car. When do I use it?
>Is it for snow? rain? Does it do a job I should be taking advantacge of?
>Also, when do I turn the OD off? I think I am supposed to turn it off in snow,
>but that is all I know.
>Help! I have no idea about cars, clearly!
From the Toyota Rav4 FAQ @
The ECT button (which stands for "Electronically Controlled
Transmission") changes the shift points for the automatic
transmission. When engaged, the transmission shifts later, allowing
the engine to get to a higher power level and accelerate faster. Gas
mileage is usually reduced in this mode. Use it when you need to get
up to speed faster; for example, to merge into fast moving traffic.
The normal position for this switch is OFF.
OD, or OverDrive, is a 4th gear on the transmission that will engage
when you are going above about 35 mph that lets the engine operate
at a lower speed (RPMs) when all it has to do is maintain a high speed
when you are going over flat, even highway. This improves fuel
economy. Technically, any transmission gear with a ratio of less
than 1:1 is considered "OverDrive". OD can normally be left ON
except when going up a gradual hill; the overdrive tends to not
give the engine enough power to maintain a steady speed. This may
cause the transmission to annoyingly "hunt" between 3rd and 4th gear.