Hey Guys. So just got back from the dealership after this issue I've been having. So when launching in tracdsc or traction control fully off I get this message on the dash regarding "2wd only traction reduced" and then turns full traction control back on. It also throws a P2787-98 code when i used my OBDll reader that stays there. So I get a phone call from the dealer saying the technician looked into it and nothing was wrong. When I got to the dealership I insisted that I would like to speak to the the technician who looked at the car. He says this is "completely normal" and that jaguar say this is code "does not indicate a fault. I tried to explain although Jaguar might not be claiming this as a "fault" tracdsc should not be turning itself off and then storing a code on street launches claiming transfer case overheating if there wasn't an issue. He didn't want to hear any of it and kept insisting jaguar says the code does not indicate anything wrong. Next closest dealership is over an hour away from me.

So to my fellow F type friends is this normal? I've attached pictures of what comes up on the dash along with the print out of the code the dealership gave me.

 

Here is the code description from Topix


This is what the tech would have looked up. Did this warning come up after 1 launch or had you done multiple launches??

Wonder if the module s/w is up to date, which we aren't supposed to do unless instructed to do so if they really want to do things by the book

If it does every time you do a hard launch with the trac on or off, then it may be a s/w issue...

 

It comes up everytime I do a hard launch off the line when the car is nice and warmed up and been driven for at least 15 minutes. the technition was extremely dismissive and insisted nothing was wrong and that this is normal. Is there any way for me to see if the module software is up to date like for example see if there were any updates since the car was manufactured and/or what I can tell them? I definitely know they didn't update anything or he would have told me. It only happens in tracdsc or full trac off as when the trac is fully on the system seems to cut the power on those hard Launches before it would trigger that warning.

 

Unfortunately there is no way for you to see if the software is up to date, unless your best friend is a JLR Tech. It requires the diagnostic software to check. JLR doesn't like it when techs start updating software for no reason, however in some DTC descriptions it does specify to do this as first part of the repair.

Did they road test it to recreate the hard launch, or did they ask you to drive with the foreman/tech and recreate the hard launch? It sounds like they just checked codes and thats it

Maybe speak to the service manager and see if they can have another look, and you may need to go on a road test with someone to recreate the fault. With a car that's built to do a hard launch, my opinion it shouldnt be triggering a fault like this, every single time. I can see a one off time of this happening, but not every time. It sounds pretty consistent from what you're saying. Hopefully the manager can get some more insight for you.

Otherwise, if you dont want to deal with them anymore at this stage, you may need to call the other dealer closest and take a trip to see them. Maybe call them first before you drive out, they may say the same thing on the phone, but hopefully they will say " no that doesnt sound right, bring it in so we can look ".

 

JBzXJ40 thank you so much more your help and insight. I originally insisted to the service manager that I would like to go for a ride with the tech to show him and he kept pushing it aside saying the head tech will take it for a test drive, which they did as I was tracking through the app on journeys. When I kept mentioning that this is a performance car and shouldnt be happening he kept referring to the jaguar print out that says this is not a fault code and to just clear and reset the code and then mentioned that maybe Im just driving the car to hard which I responded this is happening on the street and he just gave that "I dont know" look and said this is what the print out says for that code. Would you happen to know which module software I would be referring to so I'm better prepared when I go in to pin point to them and is there also any way to see if that module did have a software update, like a list of recent software updates specific to that module? Thanks again and I really appreciate your help. This is so frustrating to be going through on a brand new $110.000 car.

 

The code does say to do nothing an let cool down, strange. Remember dealers don't like to do work they don't get paid for. At our Maserati dealer they only give loaners to customers that service car there.If this is the selling dealer they should want to correct this as good business. Wonder why dealers don't do updates before delivery.

 

You answered your own question! I suspect Jaguar only pays dealers to do updates in response to a customer complaint.

 

This is not true, at least not where I live. When the car is brought in for service and the VIN entered into the dealer's system, the updates are automatically applied - unless the owner specifically requests that an update NOT be done.

 

I think there are two types of updates, ones Jaguar considers mandatory (maybe unless refused by the customer) and other updates that may fix issues which i believe are only installed when customers complain. I've seen posts elsewhere in which people have asked for updates to be applied but dealers refuse unless the customer identifies a recognised symptom as per the Jaguar documentation for the update (or the customer is willing to pay). However, I could be wrong - I'm no expert!

 

There are many issues where it has taken persistence of F-Type owners to see Jaguar corporate finally capitulate to the notion that something they deemed normal was not, in fact, actually normal. The cynic in me believes this is a kicking of the can down the street long enough for the warranty to have expired.

I saw this recently with the ongoing clutch saga...told something was normal that wasn't normal. Less than a 100 miles later, it was being flat-bedded back due to failure and, now that it is disassembled, the flywheel was indeed toast. The previously replaced clutch itself showed was otherwise would likely have been normal wear. I suspect that part of what is helping is that the original clutch replacement did not involve the replacement of the flywheel. I hope to have my car back in the next day or so...

 

@FTYPENY If the dealer has a demo F, see if you could drive it (with them or without). Treat it the same way as your own 'baby'.

If the code is 'normal', it should come on. If not, ask them to look into it some more.

Also offer (nicely) to call JLR Corporate to 'help' them identify the issue.

 

As a data point, my local dealer will update ECU and TCU software any time you ask. $250 bucks a pop. I'm out of warranty.

 

Yeah, not all dealers are created equal. I've bought my cars out of Charlotte, NC where the dealer is exceptional. However the dealer in Jacksonville is not quite as accommodating. Current case in point. I called them to get reimbursed for my O2 sensors (2) I had replaced there last year. The service rep told my wife last week when she took her F Pace in for service, the same as they told me on the phone two nights ago. That we had to call Customer Care at JNA. I pointed out that the letter stated otherwise, but they persisted. They did offer to transfer me to actual service manager, but he is perpetually busy and unable to answer the phone. So I called JNA to which the very nice lady said it can only be taken care of at the dealer and that the refund instructions were sent to them and available in their warranty menu. She also said I could call her back on 3 way with the dealer if they required JNA to directly spell it out for them. I've yet to receive a replay to my phone call or email to the service manager. Trying back today.