Check your fluid level again remember it should be at the top line.

Gus
www.jagrepair.com

 

.......and do a `Hard Reset´and reprogram the windows

FMO it is an eletric fault.

 

Fluid level is at the top line with the top up. I'll do a hard reset tomorrow and see what happens.

 

A truly way out thought, here. The security module, under the boot fuse box, is associated with correct operation of the hood, amongst other things. If it has any damp or corrosion in the circuit board, then odd things will start to happen. Have you experienced any other issues, such as door locking problems? It can’t do any harm to clean and perhaps dry it off:
1. Disconnect the battery
2 locate the module, under the fuse box
3 undo the bolts and withdraw the module
4 disconnect the module from the wiring (if I rememer right, three connectors involved)
5 open the case, then withdraw the circuit board.
6 inspect it carefully. If it is damp, allow iit to dry fully.
7 clean the underside if the board with a new toothbrush, to remove any small areas of corrosion.
8 reassemble. Reconnect the battery and re-set the windows.

It might be an idea to take antistatic precautions while you do this. I carried out the above procedure with no problems, but I don’t know whether I was just lucky -other forum members might like to comment. Security modules are very expensive, so take care.

 

I will probably do this. I have had one consistent problem that is security related. If I lock the car, sometimes the alarm will go of for no reason. I wonder if you may be on to something.

I did a hard reset and no change.

 

Goodluck with that. Bear in mind that, if it does turn out to be the security module, the steps I mentioned still might not work. The alarm issue is an interesting pointer, though.

I think that what might be happening is that when you lock the car the passenger door remains unlocked - next time it happens look in the window to see the position of the latch. If this is the cause a temporary workaround is to lock the passenger door from the inside first, then leave the car and lock up. You may have to do so with the key, rather than the remote. When you unlock with the key, put it straight back to the ignition and turn on. This prevents an alarm.

 

I took the security module out and cleaned it. It looked in perfect condition. Put it back in and I of course have the same problem.

This issue is frustrating for me because I have taken most of this car apart, fixed and put it back together. It now runs great except for this problem which I've thrown a lot of money at. Still no love.

To recap, all hydraulic lines replaced, latch and rams redone by Top Hydraulics, fluid filled to top of line. I put the top down manually. Do a hard reset. Then when raising the roof it will get to the latch, the latch will pull the top down most of the way and then stall.

After weeks of it not working, at some point it will just start working correctly, and it may open and close 10 times without problem. Then when you least expect it, back to the same problem.

 

It could be an intermittent microswitch. Gus and I have developed a top tester (see https://www.jaguarforums.com/forum/x...st-box-198922/) which could be a last resort for these kinds of issues.

 

John,

Can you make a video (with sound) of the pump reservoir during a raise-top operation that fails in the way you described?

As our resident physicist Sabrina once pointed out to me in a PM, it's possible for a seal to be permeable to air but not to fluid. So the long-shot I have in mind is air getting in there somehow. Evidence of this we might be able to see and/or hear if you can make a video.

 

Are you thinking a video of the pump itself? Using the key in the door to raise the roof so that engine noise isn't present, so the pump can be heard?

 

If all else fails, this will be my next step.

 

Yes, the pump, specifically the reservoir. Been done here before. Easy with a helper. No need to use key in door; use console rocker with engine off. Your call of course.

 

Thanks again to everyone for the help. I had a death in the family and have not had time to get back to this problem. I'll work on it next week.

 

I made a short video of the pump while raising the top. The little surge of fluid about 10 seconds in is when the latch tries to close. Any thoughts?

 

I'm getting a "video unavailable" message on my end.

 

The hex nut on top of the tank. Is the O ring seal ok?

 

You also might find this of interest...........

JagRepair.com - A Jaguar Repair Information Resource

Hope this helps!

 

Gus has been very kind with his time trying to help me. He mentioned cleaning the latch ram. I did that today, cleaned with WD40 then lubed with white lithium grease. Did a hard reset and still a no go. I also replaced the o ring on the hex nut at the top of the tank. Still no good.

 

Did you read the article about the latch? How to adjust it if its not actually latching?

 

Yes, that's one of the first things I did when this problem started.