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There's certainly a fair bit of RF being emitted by the car, well up into the couple of hundred MHz range, I confirmed this with a simple (and...
KBeck, I've already been around the car with a state-of-the-art RF analyser, in a relatively EMI free environment. The plan was to put the car...
To be honest I'm not sure. I had a 2005 Gen II Prius for three years, and although the FM radio reception wasn't great it was much, much better...
I've been trying to pin down the primary cause of the FM radio problem and think that I've tracked it to EMI from the cars systems. I wasn't able...
Definitely no cable damage on mine, plus the antenna pre-amp seems to be working OK (the Prius uses an active antenna set-up). I'm not sure why...
I know that one or two on here (rrolff?) have fitted these, with mixed results. I've also looked at the Caska/Coagent Prius-specific HU that is...
Alas, I'm afraid that fitting a longer antenna doesn't fix the problem, in fact it makes it slightly worse. I fitted a long (greater than 2ft)...
A long and interesting reply, but the problem extends way beyond DAB. My car doesn't have this very expensive (£470, ~$700) option, yet has...
My understanding is that the Prius may well use pulse width modulation control (PWM) for some of the lights, as this is pretty common now. One...
For the benefit of any UK T4 Prius owners who are wondering about this, I can confirm that there are two Smart Entry buttons on the hatch handle....
Thanks, I've run through a series of checks, including checking the 12V feed to the antenna amp, and so far everything checks out. I agree with...
Thanks for that. I have another data point to add, as I tried another experiment yesterday afternoon. I found a long (just over 2ft) roof...
Out of interest, has anyone actually had the FM radio problem fixed by Toyota? I suspect that it may be a design problem, in which case it's...
You can update the "last seen on" data for the FM radio reception problem, as I've flagged it to Toyota and my dealer following purchase of my...
Thanks for that, I go and take a look at it and see if I can get one over here. I'll admit that I'm tempted by the head unit you fitted, the...
A good observation, and one that brings us back to the root cause. At the end of the day it doesn't matter too much what the exact cause is, as...
kbeck, I used to design RF front ends many, many years ago, albeit at UHF and microwave frequencies, so understand the core noise issues but I'm...
Very many thanks for the very useful info on the Chinese head units. Given the poor performance of the stock head unit on FM I'm seriously...
Pretty much so. I get a fair bit of high-ish frequency white noise (hissing), particularly when stationary, coupled with fairly random noise...
Nice thinking, but there's nothing digital in the RF or audio parts of the radio. The front end chip outputs at Intermediate Frequency (the "IF...
