Piston Slap: A GPS-targeting Sleeper Agent?

TTAC Commentator Waftabletorque writes:

Dear Sajeev,

I’m having an issue diagnosing a navigation system problem on my 2002 LS430. I’ve gone a few years with the GPS link not working, which means it no longer receives a satellite signal and defaults to dead-reckoning mode (the GPS symbol disappears on the touchscreen). It’s a nuisance issue but it’s low on my priorities.

It also happens that I’ve been using a dashcam for the last four years. I never linked the two together until I had a couple of dashcams go bad in 2016, and spent the whole summer without one. Well, my GPS started working again, and I chalked it up to a warm summer fixing some sort of electrical wiring fault in the antenna.

Once I got my fourth dashcam in September, I noticed my GPS stopped working again. It was getting cold in the mornings and I thought my good luck spell had ended. Then, it occurred to me that maybe the GPS gets disabled when the 12V was in use. I’ve since found that it’s true for all three of my 12-volt ports (cigarette lighter, arm rest, rear seat cigarette lighter).

None of my other electrical loads (seat heaters, defrosters, seat massagers, headlights, fridge, etc) seem to trigger this issue, and I replaced the car battery in 2013.

So, what’s my next step? Is this a grounding issue? Voltage issue? A conspiracy of aftermarket electronics deliberately disabling automotive functionality?

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  • DenverMike When was it ever a mystery? The Fairmont maybe, but only the 4-door "Futura" trim, that was distinctively upscale. The Citation and Volare didn't have competing trims, nor was there a base stripper Maxima at the time, if ever, crank windows, vinyl seats, 2-doors, etc. So it wasn't a "massacre", not even in spirit, just different market segments. It could be that the Maxima was intended to compete with those, but everything coming from Japan at the time had to take it up a notch, if not two.Thanks to the Japanese "voluntary" trade restriction, everything had extra options, if not hard loaded. The restriction limited how many vehicles were shipped, not what they retailed at. So Japanese automakers naturally raised the "price" (or stakes) without raising MSRP. What the dealers charged (gouged) was a different story.Realistically, the Maxima was going up against entry luxury sedans (except Cimarron lol), especially Euro/German, same as the Cressida. It definitely worked in Japanese automaker's favor, not to mention inspiring Lexus, Acura and Infiniti.
  • Ronnie Schreiber Hydrocarbon based fuels have become unreliable? More expensive at the moment but I haven't seen any lines gathering around gas stations lately, have you? I'm old enough to remember actual gasoline shortages in 1973 and 1979 (of course, since then there have been many recoverable oil deposits discovered around the world plus the introduction of fracking). Consumers Power is still supplying me with natural gas. I recently went camping and had no problem buying propane.Texas had grid problems last winter because they replaced fossil fueled power plants with wind and solar, which didn't work in the cold weather. That's the definition of unreliable.I'm an "all of the above" guy when it comes to energy: fossil fuels, hydro, wind (where it makes sense), nuclear (including funding for fusion research), and possibly solar.Environmental activists, it seems to me, have no interest in energy diversity. Based on what's happened in Sri Lanka and the push against agriculture in Europe and Canada, I think it's safe to say that some folks want most of us to live like medieval peasants to save the planet for their own private jets.
  • Car65688392 thankyou for the information
  • Car65688392 Thankyou for your valuable information
  • MaintenanceCosts There's no mystery anymore about how the Japanese took over the prestige spot in the US mass market (especially on the west coast) when you realize that this thing was up against the likes of the Fairmont, Citation, and Volaré. A massacre.