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Sedans Toyota Avalon Toyota Avalon Electrical System Questions
139 messages, Last post on Oct 07, 2009 at 9:33 AM
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Replying to: user777 (Jun 15, 2006 12:52 am) More likely there is a fault in the electrical wiring, healight switch, ignition switch, etc that would cause this to happen.
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Replying to: badgerfan (Jun 15, 2006 5:45 am)  let's see, when the vehicle is running, power is being supplied by the alternator which maintains a charge on the battery. bad alternator, and eventually bad battery. now then, many cars are controlled by a miriade of computer systems. a poor voltage regulation section on the alternator may result in blowing headlights. in addition voltage spikes might find there way over to the various computer systems, and as I'm sure you know, that may result in a computer system getting into a random state or actual damage to components. but yeah, you'd expect this to be an issue with the vehicle running. however, if the damage to the computer was done when the vehicle was running, it might exhibit itself later with the vehicle parked. but back to the battery, if it discharges below some threshold because of a bad alternator, yeah, i can imagine a program running errant. ever have a computerized kid toy go crazy when the batteries run down past some point? a marginal alternator isn't out of the question, so i thought the randomness and a failed (new) battery could be caused by a flakey alternator. ok, maybe it's something else. maybe a bad main computer, or maybe some parasitic load drawing the battery down when the vehicle is not running. i wonder how many more ideas will be generated by the readers of this forum to the problem... ok, i'll add another, a key FOB in someone's pants pocket or purse or in the hands of a little one. never did i claim to know the root cause, but the one i postulated is still a reasonable one given the limited information provided. yes/no? yes, your ideas are also possible. nowhere did the poster ask for an exhaustive listing of possibilities. am i out of the dog house?
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Replying to: user777 (Jun 15, 2006 8:17 am) Makes me glad headlights on our vehicles are only controlled by a simple headlight switch and no day/night automatic sensors, etc. The only interlock is it warns me if I open the driver door with them still on. Sometimes life is simpler when the driver alone controls the operation of the headlights! |
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Replying to: wseattle78 (Jun 14, 2006 8:15 pm) On earlier Lexus versions if you stopped with the headlights on they would turn off automatically if you first turned off the ignition and then opened the drivers door. Open the drivers door first and the headlights would remain on forever....
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Replying to: wwest (Jun 15, 2006 9:16 am) |
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I bought my current car by this Jan. This is my first car. When it did the inspection, the car changed the new battary. but 2 months later, the car can't be started, the car was towed to repair center(it is also a gas station), i was told the the battary was not good and the charging system(i don't know car, so i don't know how to call it) who pass the electricity to battary didn't work for the battary, need to replace both of them, the cost was around $400. Because i don't the car, i don't know whether the car repair center ripped me off. this was my first car repair experience. This time my car has problem again, three lights (check, vsc and vsc off)on when i am driving the car. this time i did the search from internet before i went to the car repair center. First i went to the toyota dealer service, i just want to know what's wrong with my car, but i was told the diagnosis will charge me $220, it is too expensive. i went back home then went to another car repair center, they charged me $35 for the trouble code. the trouble code is p0171. The DTC detecting condition said: when air-fuel ratio feedback is stable after engine warming up. fuel trim is considerably in error on rich side. The guy told me: the trouble areas are 1)open or short in A/F sensor(bank1,2 sensor1) circuit 2/A/F sensor(bank1,2 sensor 1). so i need to buy two sensors, the sensor price from toyota dealer is $207 each, he said if i repair the car all from him, the total charge is $405(the parts also from toyota dealer,he said he will give me $187 each). sign, i am really bad luck, the car always give me trouble, like a momey eater. Now my questions are: 1)does three lights on, and trouble code is p0171, show the problem what the guy told me, and i need to replace two sensors? or maybe any other problems? like air indcution system problem, if so ,is it a serious problem? 2)if i don't repair it , will they hurt my car, and lead the big trouble later on? 3)should i go to toyota dealer's service or the place i mentioned above. i know from dealer the repair cost is more expensive than other personal repair center. but i think the toyota dealer is more trustable, they won't do bad thing on my car?is my thought true? Thanks everybody here can help me, i am a female and i don't know about the car,i am the only driver in my family. so i really need your help me to tell me what i should do. thanks again. jennifer |
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Replying to: jenshi (Aug 14, 2006 8:05 pm) Bob
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Replying to: bobwiley (Aug 15, 2006 9:31 am)
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Replying to: jenshi (Aug 16, 2006 9:02 am) Bob
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Replying to: bobwiley (Aug 16, 2006 9:58 am)
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