Bah! Managed to post my reply in Post # 280, as if it was part of Susq's post...Enjoy this...
Interesting video. Horrendous service, not my experience at Lexus.
Some of these cars are sophisticated well beyond the capabilities of the technician.
Thus forms the basis for my not wanting to be the guinea pig, at the bleeding edge of new tech. I would much rather see an established reliability rating in place, long before I look at involving it in my life! I recently bought myself a Toyota Tacoma. While I could have afforded the new model, it has a brand new engine in it, that is both turbocharged, and pretty heavily loaded (IIRC< 275 or so HP out of a 4 cyl motor), and frankly, until it has Years on it, I am not interested...Interesting video. Horrendous service, not my experience at Lexus.
Some of these cars are sophisticated well beyond the capabilities of the technicians.
Some people excel at troubleshooting, while others never master it.
The poor troubleshooters often take a scatter gun approach instead of following a methodical path. That being said if you don't truly understand how the defective machine/circuit works you probably will by the time you fix it.
Good job, tricky when the schematic is wrong. I'm guessing you were paid $1k/hr for your troubles;-) Love it!When I bought the farm here, I needed a row crop tractor. A salesman at the local Deere dealer knew me through his dad. He told me that they had this tractor from hell. It chewed through batteries intermittently. Every repair guy's enemy is intermittent problems. They had tried to fix it for months and ended up putting the previous owner into a new tractor.
He said I could have it for half what it was worth if I could fix it myself. Best of all, he said they would take it back if I couldn't.
I was newly retired and full of piss and vinegar back then so I took it.
My first clue was some black magic smoke on the AC compressor housing. Classic high current shorting. But to what? A hanging lighting wire from the hood hit it perfectly - sometimes. Open the hood, no short. Close it, and "sometimes" magic smoke. I fixed the wire and properly dressed it. But still no joy.
On a hunch, I checked all the fuses. It's the obvious thing a farmer would do. Change fuses whenever the wire shorted, then get tired of doing that, and put a bigger one in. Sure enough, there was a bigger one in the lighting circuit - and a smaller one a few circuits over. So I made them both right and checked the whole box. Lots were wrong - sheesh. Farmers can be Fk Heads.
But sadly, still no joy. So I pulled them all and started methodically checking every circuit. Lots didn't make sense.
That's when I discovered a back feed in the harness. Continuity from one feed to another where it shouldn't be. Probably a short buried in the harness. Nothing obvious externally, so I pulled the whole harness and then focussed on the thickest parts where heat can get trapped and melt insulation. Sure enough, two circuits fused together. So I fixed that and then rechecked the harness. All good. Put it all back together and still no joy.
Now what? I forgot to mention earlier that the dealer had given me the service manual on a CD. So I started drawing out my circuit (based on testing) and comparing that to the factory drawing. A few circuits didn't match. But I know how those service manuals are prepared. Had to be a manufacturing running change or human error. It turned out that an error had been made on the fuse box layout. I fixed that on my tractor and bingo - an almost new tractor half off.
I fed that info back through the service network, which ended with a visit from an engineer at Deere. He agreed with my assessment and said he would get the manual fixed.
Normally, nobody would ever have known if everyone had done what they should have done. But a cascade of errors starting with a farmer swapping fuses out with bigger ones led to a fiasco.
For anyone who followed all this, I have a tip for you. Replace all your fuses with lighted ones.
The fuse lights up when the fuse blows so you instantly know that a fuse is blown and which one it is. Fantastic advantage - especially on boats and travel trailers which are much more prone to shorts than cars and trucks.
And I hope I don't need to say "Never replace one size fuse with a bigger one. NEVER." Find and fix the root problem instead.
The long and short of my problem starts with Volkswagen cheating on their pollution stuff with their diesel engines. That rippled down the system to other manufacturers requiring more stringent control for pollution.That does not even begin to touch on manufacturers making poor and unsupportable decisions in regard to their products. @jcdammeyer could tell you of his torturous experiences... Or maybe he has, given that he was going through them before I knew of the existence of this site. The rough outline was that he had spent a considerable sum on a diesel car, that the failed parts were simply unavailable for, with expected waits ranging from months to years, if at all. while it was still in Warranty... His experiences, and others like his, leading directly, to the opinions stated in the first paragraph...
Mercedes second from last of 30 brands for reliability "Really".
Just my personal opinion but I find the JD Power ratings super biased and near useless. I have found CR ratings based on feedback from over 300,000 responses per year from actual consumers about as good a metric that is available. One simple example my daughter drove her 12 year old 2005 Corolla from 2017 until now and it required one $30 part. During that same period her best friend went through two Audis with 1/3 the milage that were < 10 years old and spent probably $10k in repairs during the same period.I was part of a focus group 25 years ago or so. What I learned then was that those ratings are so biased that they are basically unusable.
Two examples to illustrate.
First was a pair of models made in the same assembly plant, with the same parts, the same labour, and the same body and suspension. Even the same paint! The only difference was the model and make. One sold in European dealerships as a Japanese brand, and the other sold in North American dealerships as a domestic brand. The warranty and problems on the domestic brand were almost 7x as bad. Even the paint was 7x as bad. How the hell was that possible? We did a really deep dive extracting thousands of repairs and talking to every dealer and every customer. What we found was the expectations were different. Customers buying the domestic car assumed they were crap and demanded repairs. Customers buying the Japanese product assumed that they were as good as they got and no point in repairs.
Another example, this time just looking at price class. Similar story. People buying expensive cars (Mercedes, BMW) were picky picky picky. People buying less costly vehicles of the same brand were not so picky. The replacements on the luxury models for the exact same part numbers were double the same part on the less expensive model. Why? Again expectations drive the survey results.
Bottom line, throw those fancy magazine quality ratings in the garbage. If you need to look at them, consider the customer base before thinking they are meaningful.
Just my personal opinion but I find the JD Power ratings super biased and near useless. I have found CR ratings based on feedback from over 300,000 responses per year from actual consumers about as good a metric that is available. One simple example my daughter drove her 12 year old 2005 Corolla from 2017 until now and it required one $30 part. During that same period her best friend went through two Audis with 1/3 the milage that were < 10 years old and spent probably $10k in repairs during the same period.
Seems pretty consistent with the CR ratings.
Have to watch that”brought the farm” bit, where I come from, that ment you is dead!
Unless it's for diagnostics reasons"Never replace one size fuse with a bigger one. NEVER." Find and fix the root problem instead.
Statistics are like Bikinis! What they reveal may well be fascinating, what they conceal, though, might be critical!“There are three kinds of lies: lies, damned lies, and statistics.” Benjamin Disraeli or Mark Twain.
For JD Power rankings, a crooked Toyota emblem that required dealer intervention has the same weight as a complete transmission failure on a Dodge. The numbers don’t reflect severity, only number of complaints.