I'm usually in the S-Type forum, but I also watch Utube videos. This repair guy's videos are usually very good and he does a good job, but someone dropped off a 2012 XF with issues he isn't familiar with. Interesting video.


Bob

 

It was just the alternator, but you can see in action how effective the flurry of errors is, even to a independent pro, for getting the car to the dealer.

 

Honestly, if he can't verify that it is the alternator, being that most modern cars work similarly, he is not qualified to work on most current cars of the last 10 years...back to school buddy, or find a new vocation.

 

No mystery here it's very clear it's the alternator, when there's not enough juice modules don't come on and throws errors. He also got lucky not loosing fob communication, facelift are affected by this specially the way he swapped the battery.

This guy didn't even jump start it safely...

 

Without a hammer in his hand he seemed a bit lost

 

Think about the fact that people take their cars to him.... At least he knows his limitations somewhat, as he didn't want to throw the alternator in as he wasn't sure....

 

Yes , he actually thought it was the alternator, but was not going to start throwing expensive parts at a car without being more sure it would fix it. Yes, if it were my car , I would have gambled on that , but don't forget if he was wrong his employer might have been stuck with whatever (probably huge) cost to actually fix the car if the customer sued....

Ha ! I was thinking about starting a post about this exact youtube video. This mechanic is actually really cluey, but he was smart enough to back out of this job- the customer sounded like a real PIA so it would just be lose-lose from the start. The jump start was not unsafe IMHO, followed standard procedure from what I could see.....yes car losing communication with a module is possible with any too darn smart for its own good vehicle if it is faulty , when you disconnect the battery ???

 

Not quite. To jump start you should NOT connect negative directly to the battery. Instead the negative lead must be connected to a ground point to avoid issues with the battery control module. That's not specific to Jags but the case for almost any modern car. Its even stated in the owners manual.
Chris

 

Hmm... I probably missed the important part here that you must be referring to in the manual , but my understanding was that the issues with connecting to negative terminal vs ground referred to the BCM keeping track of the battery charge state which it won't do if you connect directly to negative terminal rather than ground ... not a short term thing like jump starting a car . Are you saying connecting directly to negative terminal will fry the BCM ?? I didn't know that ! You will also find that usually the blanket recommendation to connect to ground as a general jump starting recommendation is to minimise a spark near the battery- even if the car does not have a BCM. I'm not necessarily arguing with you , but I find your comment thought provoking.

 

I'll just say this. My dumbass did not read the manual and tried to charge the battery in the car with it hooked up. It made my expensive 40A universal power supply start smoking. So it was putting some weird oscillations through it. No bueno. And I'm not some retard. I have topped up the battery in my old dodge truck, my wifes 2016 jeep grand cherokee, and my old 2010 BMW without a problem. Battery in the car power off. But this Jag is doing some "things" even with the car off.

 

YIKES !!!! Good to know !!