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From: Chuck Olson on 23 Jul 2010 20:04
I was out shopping today and for my return home, I started the car normally
using reverse to back out of a parking spot and forward to leave the parking
lot and enter traffic. I immediately noticed an unusual drag when not
pressing the accelerator. But there were no alarm-lights lit - - nothing to
indicate anything was wrong. I entered the freeway, turned on "cruise" and
when I was at the desired speed I pressed "Hold" and found it would not hold
speed. "Cruise" was showing on the dash panel, but it just wasn't working,
and again the deceleration when not giving it gas was greater than normal. I
had to stop at a store on my way home, and when I came out and restarted the
car, it was back to normal. There was no excessive drag when not feeding gas
and cruise worked just fine. I guess I was lucky the casualty state it wound
up in was a benign one.

From: Hachiroku ハチロク on 24 Jul 2010 00:05
On Fri, 23 Jul 2010 17:04:50 -0700, Chuck Olson wrote:

> I was out shopping today and for my return home, I started the car normally
> using reverse to back out of a parking spot and forward to leave the parking
> lot and enter traffic. I immediately noticed an unusual drag when not
> pressing the accelerator. But there were no alarm-lights lit - - nothing to
> indicate anything was wrong. I entered the freeway, turned on "cruise" and
> when I was at the desired speed I pressed "Hold" and found it would not hold
> speed. "Cruise" was showing on the dash panel, but it just wasn't working,
> and again the deceleration when not giving it gas was greater than normal. I
> had to stop at a store on my way home, and when I came out and restarted the
> car, it was back to normal. There was no excessive drag when not feeding gas
> and cruise worked just fine. I guess I was lucky the casualty state it wound
> up in was a benign one.

Sounds like one (or more) of the 'regenerators' in the braking system may
have been on. I'll guess you know about these, and a check of the ECU
by a TOYOTA dealer (DON'T go to Autozone for this one) may turn up a
fault. They used to offer this service for free, but have since found they
can get ~$100 for it...

If the ECU thinks the brakes are on, it won't allow the cruise control to
hold speed.



From: Daniel who wants to know on 25 Jul 2010 03:10
"Hachiroku ????" <Trueno(a)e86.GTS> wrote in message
news:4c4a66ad$0$74750$afc38c87(a)read01.usenet4all.se...
> On Fri, 23 Jul 2010 17:04:50 -0700, Chuck Olson wrote:
>
>> I was out shopping today and for my return home, I started the car
>> normally
>> using reverse to back out of a parking spot and forward to leave the
>> parking
>> lot and enter traffic. I immediately noticed an unusual drag when not
>> pressing the accelerator. But there were no alarm-lights lit - - nothing
>> to
>> indicate anything was wrong. I entered the freeway, turned on "cruise"
>> and
>> when I was at the desired speed I pressed "Hold" and found it would not
>> hold
>> speed. "Cruise" was showing on the dash panel, but it just wasn't
>> working,
>> and again the deceleration when not giving it gas was greater than
>> normal. I
>> had to stop at a store on my way home, and when I came out and restarted
>> the
>> car, it was back to normal. There was no excessive drag when not feeding
>> gas
>> and cruise worked just fine. I guess I was lucky the casualty state it
>> wound
>> up in was a benign one.
>
> Sounds like one (or more) of the 'regenerators' in the braking system may
> have been on. I'll guess you know about these, and a check of the ECU
> by a TOYOTA dealer (DON'T go to Autozone for this one) may turn up a
> fault. They used to offer this service for free, but have since found they
> can get ~$100 for it...
>
> If the ECU thinks the brakes are on, it won't allow the cruise control to
> hold speed.
>
>
>

Sorry Hachi, but Elmo pegged it, somehow the car ended up in "B" instead of
"D". B enables engine braking for descending long hills. This helps the
car to avoid using the friction brakes and puts fewer amps into the HV
battery so it charges slower doesn't heat up as much. Obviously for short
hills and any other driving you want to be in D for maximum regen and MPG.
Not sure why B disables the cruise but it does.


From: Hachiroku ハチロク on 25 Jul 2010 11:37
On Sun, 25 Jul 2010 02:10:20 -0500, Daniel who wants to know wrote:

>> Sounds like one (or more) of the 'regenerators' in the braking system may
>> have been on. I'll guess you know about these, and a check of the ECU
>> by a TOYOTA dealer (DON'T go to Autozone for this one) may turn up a
>> fault. They used to offer this service for free, but have since found they
>> can get ~$100 for it...
>>
>> If the ECU thinks the brakes are on, it won't allow the cruise control to
>> hold speed.
>>
>>
>>
>
> Sorry Hachi, but Elmo pegged it, somehow the car ended up in "B" instead of
> "D". B enables engine braking for descending long hills.

Yup. I had forgoten about that feature! You have to remember, I only drove
a Prius for about 3 days, 6 years ago!



From: Hachiroku ハチロク on 25 Jul 2010 11:38
On Fri, 23 Jul 2010 21:23:20 -0400, Elmo P. Shagnasty wrote:

>
> BTW, what happened to you wasn't a glitch--it was that you weren't in D,
> you were in B. You did it by mistake, obviously, and it seems you may
> not know what B is. Read your owner's manual.

Are you saying a Toyota operator may have made an error?



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