Last post on Jun 19, 2012 at 10:01 PM
You are in the Toyota Yaris
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Toyota Yaris, Toyota, Transmission, Coupe
#90 of 107 Re: Is this downshifting effect "felt" at very low speed normal? [gilzara]
Jun 14, 2010 (2:12 pm)
I'm glad to hear that both you and raggy1 noticed this as well!
My 2010 Yaris automatic also jerks/applies the brake while I am coasting between 20-25 miles an hour. I also noticed it between 30-35, so I figured it was related to the downshift. However, when I notice this issue it happens for 4-5 seconds and does not happen every time the car downshifts. (I can feel the downshift when it feels normal too, and it only lasts about 1 second, if that)
I took the car in to the Toyota mechanic at the dealership and they told me I was only feeling normal downshifting - which makes me think that it just did not happen while the mechanic was driving the car. (Unfortunate, because it does this to me all the time) I did not get charged for the visit, but I am still concerned. I know what a downshift feels like, and 4-5 seconds of jerky braking is not it.
Has anyone else experienced this?
#91 of 107 Re: Is this downshifting effect "felt" at very low speed normal? [gilzara]
Jun 15, 2010 (8:36 am)
I think it's normally "abnormal". What I mean is that the transmission is strange on the Yaris automatic - it's my one major complaint with the car. It doesn't bother my wife who is the primary driver, but it annoys me and were I to buy one to replace my Echo, I'd buy the manual or nothing.
It definitely seems to not quite shift when you expect it to. Whether forcing a downshift to accelerate which takes a heavy tromp on the gas pedal and then not upshifting as quickly as you'd think either.
So, it is normal, it's just a little weird. You get used to it pretty quickly, but I always notice it at first after I've been driving my car for a while and then I drive my wife's.
#92 of 107 Re: Is this downshifting effect "felt" at very low speed normal? [dake]
Jun 15, 2010 (12:46 pm)
I own 2 Yaris's---an 07 and an 08 and they are quite different cars. Both with same transmission and engine, but the 07 has less power, does NOT shift when cold, and I found that if you press the brake lightly when down hill, it will downshift---but when you press the brake hard it will NOT downshift.
I am looking for a professional Toyota MEch that can tell me just what to disconnect for the down hill braking, and also what sensor monitors the Cold Temp for up shifts in the morning. My Echo was a FAR better car than this will ever be.
This car with same engine gets less milage because of shift points and RPM changes. It also has less overall perfomance. IF there is a Toyota man out there, email me at FLapswgmaol.com Thanks
#93 of 107 Re: Is this downshifting effect "felt" at very low speed normal? [flaps]
Jun 16, 2010 (10:18 am)
The Yaris is also heavier than the Echo - that's the biggest factor.
#94 of 107 Defect in 2007 Toyota Yaris
Jun 28, 2010 (10:26 am)
If you own a 2007 Yaris 3dr Hatchback below vin# jtdjt9#3*75126293 there is a defect that will cost you $1200 to fix when the defect causes a failure. It is not a personal safety issue just a preventable costly repair. Toyota chose to change on going production, but not correct defect in cars already produced. They will correct the defect and failure if discovered within the Warranty period.
#95 of 107 transmission
Feb 12, 2011 (12:44 pm)
ok, so I picked my brand new yaris up today: cant believe the lag/drag when it shifts up, not down. most here complain of some downshift problem. mine decelerates as if i was breaking when shifting from 1st to 2nd and 2nd to 3rd.........checked the handbrake several times to make sure it was not the break causing this. please tell me this this something toyota will immediately take care of, fix it, and apologize. it cant be that the car drives like this!!!!!!
Feb 13, 2011 (1:15 am)
shouldn't do that. I'd call your dealer and complain ask them if your car needs an immediate ECU flash right outta the box.
#98 of 107 Re: Is this downshifting effect "felt" at very low speed normal? [jlbetsworth]
Mar 14, 2011 (5:36 pm)
I believe what you may be experiencing is not a transmission issue! I have 2 manual transmission units an 09 and 10 in the fleet. These cars have an electronic throttle body which is controlled by the computer. On the manual units, I have to take my foot of the gas, count about 1-2 then hit the clutch. The response time of the computer shutting off the gas is slow. It takes about the same amount of time for it to apply the gas when you hit it. Therefore on an auto unit, you will also have an additional lag in timing response for the transmission to respond to the action of the throttle body!
As for jerkiness, you may be drifting between the shift points and the tranny is having trouble deciding what gear to stay in. Try staying a bit above/below that point on the gas pedal and see what happens.
Best of luck to you on this. I hope this may help.
#99 of 107 Not a problem or a defect, but a fuel saver!
Apr 04, 2011 (11:47 am)
Here is what is happening....
When you let off the accelerator;
1. The ECU cuts engages the locking torque converter, in the transmission. This links the engine to the drive wheels, in the same manner driving a standard with the clutch engaged and the transmission in gear.
2. The the ECU shuts off the fuel injectors, so when you are coasting the engine is kept running by the inertia of the vehicle.
3.As the vehicle slows, the transmission must downshift to keep the engine at a "normal" operating speed.
This helps "recapture", some of the energy used to accelerate the vehicle, in a similar manner to a hybrid vehicle. So don't worry, it is saving you fuel, and if you have a standard trans; coast in gear to allow the engine to use ZERO fuel while caosting down. It takes getting used to, but after awhile, it goes unnoticed.
Now why Toyota doesn't put this in the owner's manual, is beyond me!