2017 ECT PWR mode / S
Hi, maybe my first post here but I'm not new to Siennas. I've rented the first gen for months at a time, owned two 2nd gens and now few third gens.
I had a problem with my 2015 so I was trying to replace it with a new 2016. Alas, none left.
This was because during my test drive of the 2017s, I felt the transmission stayed in the low gears too long and when the accelerator was pressed moderately but not aggressively, the engine felt like it lost 30HP and rather than gained 30hp. When fully pressed, I could feel the power of the new engine. On the highway, it was very quiet as it stayed in the higher gears of the new 8 spd transmission. I drove a demo 2016 back to back with the 2017 a few times.
So I bought a 2017 Limited Awd and I thought I could learn to live with what was less than satisfying engine/transmission combo. I know it was touted in a few reviews as preferred over the 2016's. I just didn't see it in my style of driving. I hoped the transmission will learn my driving style. I experimented with the S position and perhaps it changed the shifting pattern but I wasn't sure yet. In the previous Siennas, I felt it only limited the top gear and changed nothing. This was a bit different. I still was bothered by the feeling that it lacked power as the engine revved towards 4000 rpm feeling like a 4 cylinder.
I knew the new engine was this Dual VVT-I but I didn't pay a lot of attention to it. And the dealer agreed that the 2016 was the better driver and Toyota needed to tweak the transmission shifting a bit more.
I've not finished a tank of gas with this van yet but along the way, as I scrolled through the little screen in front of the steering wheel, I saw an option to turn on ECT PWR. With it on, the Eco light went out.
Suddenly the van felt like it gained a lot of power, the transmission shifting seems different but for me the more noticeable factor was a sense of power. No where in the manual does it say anything about how it affects the engine. Only it would be helpful in mountainous terrain, etc. I like what I found and it was very exciting for me but it was hard to find info on it.
I'll report back as I experiment with it some more.
From the 2017 manual pdf file pages 234-237:
Use when high levels of response and feeling are desirable, such as
when driving in mountainous regions or when overtaking.
Vehicles with monochrome display
Press the “DISP” switch to display
the “ECT PWR” and press and
hold the “DISP” switch.
When power mode is on, the “ECT
PWR” indicator will come on.
Vehicles with color display
Press the 4-way switches left or
right to select settings display.
Press the 4-way switches
upwards or downwards until
“ECT PWR” appears.
Press the center button to
change to “ON”.
The “ECT PWR” indicator will be
Each pressing of the switch turns
power mode on and off.
Finally the S mode:
●When the shift range is 7 or lower, holding the shift lever toward “+” sets the
shift range to 8.
●To prevent excessive engine speed, a function was adopted that automatically
selects a higher shift range before the engine speed becomes too high.
●To protect the automatic transaxle, a function is adopted that automatically
selects a higher shift range when the fluid temperature is high.
Last edited by Jae P; 01-03-2017 at 02:12 PM.