<edit February 12, 2014......I got my answer>

Hi guys (and any gals out there),
Greetings from cold, windy Maine in the US. This is a long post and I apologize in advance.
2005 3.0 estate wagon with Navigation.
I've got an odd issue - To begin with the navigation display has an inconsistency with which touch screen functions are working - I'm looking for a root cause to sort this out.

Let me start with what is working:
The radio works, including all preset buttons, volume and sound adjustments.
The set-up menus all work.
Logo leaper screen works.
'917' test mode works including color tests and GPS locator coordinates.
The clock works, outdoor temp works.
Heater & A/C fan speed settings work. Temperature variation settings work.
Steering wheel controls for the radio are in sync with the display screen.
The Navigation hard button works and the touch screen button will step me through the 'I agree' screen and request that a disc be inserted.
In other words many menus work with touch button functionality.

What isn't working:
The trunk module will not suck in a NAV disc. It's like it isn't even powered up.
The only climate control air flow that works is the window defrost. The front vent, floor vent, mixed-location vent choices do not work. The touch screen buttons for these choices will light up when pushed but will not activate the desired air flow direction. No matter which button you choose on the screen, it continues having the air go to the front defroster.
There is no sound coming from the display...no chimes, beeps, alerts, sexy voices or anything.

What I have done so far to trouble-shoot:
I have checked all the fuses listed in the owners manual that are related to the dash, display, Voice, and Navigation. I used a multi-tester to check for continuity on each fuse. All fuses were good.
I removed the trunk DVD module to check the condition of the wiring harnesses, all looked good no damage evident in the area either. The ground lead to chassis passed a continuity test. I checked the three wiring harnesses for battery power. With ignition on - One had 12v supply, one of the two smaller ones had a 5V supply, one of the two smaller ones had no battery supply.
I pulled the housing off the DVD unit and checked the disc drive for visual problems. I checked the circuit boards and components for visual signs of burning or poor solder joints. The male & female harness connections were straight and solid. The entire module looked clean and intact.
I reassembled the module and hooked everything back up - it worked the same way as before with no improvement in functionality. (and no additional issues either after having it all apart, thankfully)

Using the 'How-To' links on here I found the chassis wiring diagrams for the Estate Nav unit and honestly got bewildered trying to make sense of which leads performed which function. That trunk module is responsible for a lot of functions I've learned. I reached my skill threshold to trouble-shoot any further what might be causing the above-noted functions to not work.

I am fortunate that the only heat & air direction is blowing on the front glass cause that is the safest thing to have in this cold northern climate. But I'd sure like to be able to change the direction to the floor or to the center as needed. Those screen button choices won't respond.
I'd like to be able to put in a navigation disc and have that system working too.

I'd like to hear from anyone that could shed some light on what I could possibly do next to isolate the cause(s). Taking it to the local dealer is a very last resort. I just had to have the oil pan gasket replaced and the transfer case too. Their hourly rate is about five times higher than my take-home pay per hour and I have just enabled the whole staff there to have a Christmas party and a bonus too with one that one single repair bill. The repair tech is probably hiring top-shelf strippers after he gets this week's paycheck.

Thanks for reading all this and I look forward to hearing from you about suggestions, guidance or any humor to share cause I would appreciate all three.

Oh - I should mention that these issues were present when I bought the car so I don't know how long it has been this way or what might have caused it in the first place. Feel free to give me some grief about checking the car more carefully before buying it. I deserve that. I fell for it's looks, utility and AWD capability. Sure is a sharp looking car, huh?

Tom

 

Hello Tom,

see if this helps, I am not sure what the problem is but fingers crossed!

DIY: Diagnose It Yourself - JaguarClimateControl.com

Re the dvd not playing, I am sure that the optical lead is needing reset or reconfigured. Or, you may be missing a lead but I am unsure of the X Type estate set up as I don't have any navigation on my saloon.

I hope you get sorted soon, have ypou any car buddies out your way who can help?

I always believe 2 heads are better so to speak and you may come up with something good!!! Which actually doesn't break the bank!!

Good luck and keep us posted, hang in there!!!

Regards, Stu

 

Many thanks for the reply Stuart!
This gives me a place to start poking into the system. At the moment we are having a snowstorm and then it is a family holiday for a couple of days so I won't be able to do much diagnostic work until I have a combination of time off, daylight and temps above freezing. I don't have anyone handy who knows vehicle electronics, I tend to do repairs and car work all alone. My car buddies know the models such as older Fords and Chevy that didn't have such complicated systems.

I still have all the issues noted above. Will keep you all posted on any discoveries and success.

Thanks again,
Tom

 

Phew, you sound busy Tom, that seems to be the norm for this year up to Xmas!!!

I am sure you will need the optical lead "switched on" by a Jag specialist as it's a good sign as your nav disc and changer are showing little sign of life and your dash buttons are not recognising anything.

I hope you get sorted and good luck for your festive planning too!!

All the best, Stu

 

Update on my situation:

I needed to get the floor heat fixed as a #1 priority. This morning was 9 degrees F (-13 C) and all the heat is on the windshield. The easy fix would be to run a clothes dryer vent hose to the floor - redneck style. But instead I took out the glove box and found the drive motors that direct the air and change the heat mixture. Two were working and the third (the hardest to reach of course) was working but the mechanism it turns inside the plenum dropped down inside it. I have no idea what it was that fell inside or what caused it to not direct air in the first place but all I know is that the car has to be significantly dismantled in order to remove that plenum under the center of the dash. No way for me to do that kneeling on a chair cushion in the driveway this time of year. I muttered some curses and had to put everything back together, still having only windshield heat. I guess I should be fortunate that I didn't break anything else trying.

Now for the thing you say Stuart - about the optic lead for the DVD reader. This is interesting, especially since another thread on here was from someone that didn't have any sound and the suggested fix was to check for a disconnected fiber optic harness. Hmmmm. I don't have any sounds coming from the Nav display - just the normal radio sound. Maybe I have an optic cable that controls the DVD player and the Nav display sounds?
I ran out of daylight and time and will have to try again some time soon. If anyone has more information on how this 'switching on' of the lead is done by a specialist I'd appreciate it. Special equipment needed I assume?
I'd like to see if I just have a loose connection first. The rear DVD player connection is in good shape and snapped in proper. How many other places are those optic cables found?

Tom

 

Just wanted to wrap up this thread with the final chapter. It turns out my DVD player unit was non-functional. I ended up purchasing a 2003 model player from E-Bay and it arrived today. Even though it was getting dark and was a very cold day, as soon as I got home from work and saw the box balanced on top of my mailbox I went about removing the panels in the back of the wagon and taking out the old unit. I had to stop halfway to go inside and warm my hands near the wood pellet stove and get a flashlight. (it was only 17 degrees F outside) I installed the replacement unit, crossed my fingers and turned on the ignition. YAY!!! I had a working display for the first time since I owned the car! As a bonus the replacement unit came with a DVD (2002 version) inside.
The loveliest female voice told me to proceed on course to my destination after I entered an address.
So, if you have a working dash unit but the trunk unit won't accept or pull in a disc, chances are the DVD player is roasted and needs replacement. For what it is worth I paid $140 for a used replacement but I had to search for two months before I found one at that price. The typical price for those things on E-Bay is about $225 and up. They don't usually come with any type of warranty either.
Thought I'd share the end result of my inquiry with you all in case this is helpful for the archive.

Tom

.