Speed Control Springs Problems of Toyota Prius

Often referred clock spring as it is referred to part number 84307-47020 it affects a multitude of things on my car that are safety related including the horn, the buttons on the steering wheel that control the radio and tricks odometer, the airbag, maybe be airbags plearle, be adaptive cruise control and maybe other things. My knowledge my car has never been wrecked or had airbags blown and this is very premature for this part to fail. Believe Toyota should take responsibility for it. The warning light came on and it says in the manual that is unsafe to drive. Do not have a clue why it failed. The Toyota dealer repair is close to $900 which is ridiculous.

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The car suddenly lost power without any warning while driving 65+ mph on the freeway. The check hybrid warning light came on. The car became dangerously unresponsive, luckily we were near an exit and were able to coast to safety. The hybrid system was expecting information from the accelerator, and when it doesn't receive it, either the gas engine, or the electric engine, or both engines fail to operate. Toyota has service bulletin 2001 Toyota Prius unknown or other service bulletin 117006 action number: 635861 service bulletin number: 117006 report date: Sep 12, 2002 component: unknown or other summary: some vehicles may exhibit a master, hybrid and malfunction indicator warning light on with diagnostic trouble code p1120. P1120 Toyota description accelerator pedal position sensor is mounted on the throttle body and it has the 2 sensors to detects the accelerator position and a malfunction of the accelerator position. The accelerator pedal position sensor is connected with the accelerator pedal by the accelerator wire. The ecm judges the current opening angle of the accelerator pedal from these sensor signal inputs and it controls the throttle motor based on these signals. If the the p1120 code is stored, the ecm shuts down the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring. However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable. I have since learned that the accelerator sensor assembly is probably at fault, which is a high cost item $300 dollars or more which Toyota would balk at replacing in a recall. This happened once before, but I don't recall the date.

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I found that there is malfunction on the buttons on steering wheel, especially info button and buttons for climate. I researched the problem on internet and I found the problem is caused by a bad clock spring. Also, I found the clock spring is related with air bag module. There are a lot of owners have the same problem (such as Priuschat. Com). I think that it could be a recall issue. And I experienced another problem. The accelerator pedal of my car was repaired by the recall service before. But when I release the accelerator pedal and try to push brake pedal, there is difference of height between both pedals. The height of brake pedal is higher than the accelerator pedal, even if I released the accelerator pedal. So it is dangerous to operate both pedals. When I tried to push the brake pedal after I released the accelerator pedal, my right feet was stuck with the brake pedal. I think the recall service for the accelerator pedal of my car was not successful. Or there is another problem on the brake pedal of Prius.

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While driving my wife's 2010 Toyota Prius from colorado springs to alamosa we experienced the following anomaly. We were on the freeway (I-25) driving south on level terrain with the cruise control set at ~70mph. I noticed a significant increase in the engine rpm and could see the engine display for the engine in the pwr mode. I disengaged the cruise control and waited a short period of time and reengaged the cruise control. A short time later (~15 minutes) the rpm increase occurred again and I once again disengaged the cruise control. I did not use the cruise control again on the trip. My wife has used the cruise control rarely since her use does not include freeway driving.

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Within the first year of owning my 2004 Prius I experienced unintended acceleration. In the old days (I'm 71) if you experienced unintended acceleration you would right off check your gas pedal and floor mats. That kind of problem wasn't all that uncommon when you owned old cars. If you didn't find a problem in the area of the gas pedal you would pull off the side of the road and usually find the throttle spring on the carburetor messed up in some way or something along those lines. Well, when it happened on my Prius going about 40 mph on a stretch of road not so far from my home I instinctively checked my floor mats and throttle shaft for interference or sticking. No problems found. I got the car stopped - don't remember how (with years of driving experience you instinctively try things until you find something that works). Anyhow, after that I went directly to mytoyota dealer where they checked it out but found nothing. The problem never occurred again. Now I see this claim that it's not an electronic problem on this drive-by-wire car. I don't believe it. If you think about it, if it happens just one time on my one Prius in thousands of miles of driving, that makes an incident of this sort pretty rare, rare enough to where it's unlikely to occur under controlled tests (it would be infinitely easier to find the proverbial needle in a haystack). Virtually every microprocessor controlled product I've ever used has required a reset now and then. Usually there's no indication of why the product locked up (or whatever). If you use satellite tv, a dss modem, or own a pc I'm sure you've experienced it. Why it should be any different with car microprocessors is beyond me. The answer is for the government to require some kind of fail-safe apparatus on every drive-by-wire car in the future (I see Toyota is already implementing this concept into their 2011 cars). Heck, my life or the life of my children or grandchildren might very well depend on it.

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