Just letting Gen III drivers know that using an OBDII splitter and two gauges can sometimes cause a loss of regen braking and traction assist accompanied by various yellow lights on the dash. It can be restored by switching the vehicle off, unplug the OBDII splitter and restarting the car. This has happened to me on three seperate occasions.
View 8 RepliesI'd like to upgrade the head unit to something which sounds a little better and offers better A2DP streaming (the Australian Prius I-Tech doesn't offer stock Bluetooth streaming and the GROM Audio unit I am currently using to achieve this is temperamental). Everything I read suggests that you loose IPA if you do this upgrade, and while I know most people probably won't miss the feature, I personally find it very useful.
View 3 RepliesThe topic is as much as I can say to what my car's problem is.
2010 Prius II with 50k miles now.
I had my scangauge installed at the end of Oct 2014 so I haven't had the chance to use it in the summer. I have also done the the Intelligent Power Module (IPM) recall about 2 months ago. I have never noticed this issue before the hot weather.
When the weather gets hot, the regen gradually lowers the recovery amp. Normally it can regen at over -90 amps. As weather gets hot, it limits the regen to about -65 amps max. When it gets hotter, the regen lowers down to -35 amps max. I can feel the car not slowing down as quick as at -90 plus amps. When the car has been sitting under the 100f+ for a couple of hours, regen is completely at idle (less than -20Amps.) Mechanical brakes take over. The car feels the same as -30amp regen, HSI shows it is regen braking. However, scangauge shows idle regen (less than -20Amp) and the slowing down is done by mechanical brakes.
I have noticed recently that I seem to be getting less regen braking force than I used to. Particularly noticeable at higher speeds at over 45MPH or 70 KMPH. The regen seems to have very little effect now until I have slowed down. I seem to have to use much more brake than I remember recently. And by the way the battery in not nearly fully charged....Regen does come on but seems to have very little slowing power....
View 13 RepliesI have a 2009 Prius with about 33,000 miles. Owned it about 6 months. It has the original Goodyear tires. I notice that when I do a quick turn, or go over a bump or something like that, I will have a quick moment of "squeal", which I imagine means a little loss of traction.
Is this an indication that my tires are ready for replacement? They still have a reasonable amount of tread. Or is this simply characteristic of this vehicle? Or might it indicate some other problem?
I have a Prius 2005 with an Engineer 4kwh kit installed [v4 bms]. Lately, I have experienced several instances where the Prius suddenly looses much of it's traction power and the engine races, and the red triangle and engine service lights go on at the dashboard. This happens with the kit turned on, and often after a few kit on/off cycles to get more ev mode. The Prius battery is sometimes low, sometimes not, when this happens. Not sure if it also occurs with the kit off.
The Prius seems to retain some traction power up-down by the throttle pedal, but most power goes missing. On the other hand the engine races and does not seem to power the wheels or vary by throttle. When I pull off the road using brakes normally, and turn off the car/engine and restart [kit now off], the car seems to reset and can resume driving normally, but the error code lights [triangle-engine] lights stay on.
My 07 Prius recently started to get a traction control warning and loss of power on smooth, dry roads at 65mph on an interstate highway..... There was enough space between us and the 80,000 lb truck behind us..... As we slowed the warning abated and power was restored. BUT, the car will not maintain 65 mph without this recurring. Toyota has not been useful. Nothing stored on the pcu indicates what may have occurred.
View 2 RepliesMy park assist doesn't go on. It only peeps two times when I push The assist button and nothing happens. Before it works normally.
View 1 RepliesAre there any hacks to the "safety" feature which disables Lane Keep Assist in cruise control mode when you don't touch (i.e. turn) the steering wheel for 5-15 sec? Now that is a mod I'd really like more than a NAV override. That thing disabling on me on long stretches of straight highway after 15 sec is absolutely annoying, especially since it does this EVEN WITH my hands on the wheel. To be honest, many times it suddenly disabling on me ended up being more of an overall safety risk than its purpose intended. Also, the thing disables enough on its own due to not being able to sense the lanes where any additional safety almost makes the LKA option useless. The Infinity I owned had a much better LKA lane sensing camera than this Prius. But it can at least be improved a little if we could disable that annoying safety. How it senses that the wheel has turned and try to trick it with a pulse every few secs? Only Prius 5's are installed with LKA.
View 5 RepliesI have a 2012 Prius with Advanced Technology Package. I'd like to always have Lane Keep Assist on. Is there some sort of hidden setting so this comes on by default rather than having to set it every time I start the car?
Also, I don't like the dim feature of the rearview mirror. It comes on by default. Is there a way that it can be set so it is off by default? It is hard enough to see out the rearview sometimes, and the dimmer makes it more difficult for me at night. I don't like having to hit the switch every time I start the car at night.
My 2007 Prius has 120,000 miles. I live in a mountainous area. I need to climb 3 miles at 6% grade to get out of my neighborhood. Lately I've been noticing the traction battery loses charge fairly quickly and I've been thinking about replacing the battery. Much of my driving is in steep hills and I run a full charge cycle many times a day, so I guess I should expect some loss of life.
View 7 RepliesSo the other day I was rotating my tires in my driveway, Once I was finished I took it for a test drive and about 2 minutes into the drive the traction control light (yellow light upper left hand corner) came on and has been on ever since. I haven't noticed anything else different while driving except the light remains on and that the "hill start assist" isn't working so I assume the traction control isn't working. I have tried pulling a code with a scan gauge but no codes where present and I also tried to reseting the battery by unplugging the ground cable for 10 minutes but no luck.
View 19 RepliesI took delivery of my new prius a few weeks ago and of course played around with the parking assist. However in the last few days when I press the button to start the process I simply get a double beep and nothing more happens.
I called the dealer and they don't seem to know what it is and so have booked me in to take a look at it.
I have 2010 prius III with JBL E7022 navigation. I dont know why i cant get the IPA system when i put the shift to "R" and the Auto Parking Assist pre support selection button right side the steering wheel is blank.
View 6 RepliesEverything was working fine until I started messing with camera settings in the service menu today . Now when I shift into reverse, it says "system not ready". Will not let me parallel park or reverse park now. I tried to reset the settings but maybe I don't know how to "save" settings.
View 5 RepliesGreat car, Love it! It's a big improvement from the 2006 Prius.
When applying the brakes and holding the pedal down, I notice that the indicator for slippery/traction yellow icon appears in my dash when completely stopped.
There is no map option on the steering wheel that allows you to switch back to the Nav/Map system on the HD display. Is there a voice command?
The other day I start my car in the garage. Backing out I know the brakes aren’t working normally. Testing in the driveway confirms that there is no power assist to the brakes. The engine is idling properly and there is no CEL or dash brake light lit, but there is non-power braking only. So I put the car back planning to work on it later.
Some two days later I start the car for testing and the brakes are back to normal. I have the usual power assist. There are no other problems.
I've had this problem a couple times now. I start the car in the garage, take the parking brake off and try to move forward. Car does not move, but inches forward like I still have had the parking brake on. I double check, it's off. And to state the obvious, I do not have my foot on the brake.
I think maybe it's hill assist, though my garage barely has an incline that probably wouldn't trigger hill assist. I try to put it in different gears and attempt to accelerate in reverse, same thing.
So, that leads me to believe, are my brakes stuck? I steadily accelerate and the car finally budges. I hear a loud "POP-TWANG!!" under the car like I just popped the parking brake. The car lurches forward and I drive out of the garage normally.
I don't hear or see any other performance issues after this under normal city driving. This was after the car was not used and was in the garage overnight or longer. I did drive a few hundred miles the day before but not under significant load or stress on the car.
This is my first year driving my prius during a hot season, and for past 3 weeks my mpg has dropped from 49 to 41-43 mpg, and the reason is my traction battery keeps getting HOT! I can hear the battery cooling fan turning on constantly at max when i reach 20 mph, my car doesn't want to start in EV mode the engine just kicks in no matter how light you press the throttle, the EV motor is not assisting with the engine, the infamous slow rpm drop keep occurring and I when to touch the traction battery case and it its HOT, Ive open up the case to check for any dust on the fan and ducts but so far its spotless. I really wished they place an AC vent for the battery because the back passenger area with full A/C doesn't t get as cold as the front dose which doesn't cool off the battery.
View 19 RepliesIs there a way to turn off Traction Control on a 2012 Prius? It's not useful when trying to break a path thru heavy wet snow. I've looked in the Owners Manual, but so far haven't found a description of deactivating Traction Control.
View 7 Replies