Hello all thankyou for letting me join. I am in need of some help. I have a 2006 2.7 S Type XE with a gearbox problem. My car is stuck in Park and will not engage the starter. I can start the car by jumping the starter relay. I can use the park overide switch to get the car in D or R. The car moves fine in R but is stuck in what I think is 3rd gear when I use D. The lights on the J gate do not light up at all. I have just tried another J gate and it seems to make no difference at all. I only have a Snap on scanner and it will not comunicate with the TCM. The dash shows Gearbox fault and Park brake fault. The codes I got were U0101 and U0402. Does anyone have a pinout of the green connector from the J gate it has 8 contacts in it. Any help or ideas would be a massive help.
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Did you check the two bolts at the attaching point where the selector cable meets the transmission housing?

 

No I haven't. Do I need to jack the car up to see them? Whick side of the box are they on? Thankyou for your fast reply

 

Welcome to the forum,

It doesn't sound like the bolts have come loose as you can select the transmission by by-passing the interlock.

You can find the electrical diagrams here JagRepair.com - Jaguar Repair Information Resource I don't see a green 8 way connector in the J gate maybe a photo would help.

 

Its the green plug that comes from the J gate. It has 8 pins in it

 

The connector is clipped in under the electric park brake lever

 

Don't see it.

 

No I couldn't find it on the drawings. Its deffinately green. If you look at any used J gates for sale on ebay you can see the plug. There is even a video on Youtube where there is a guy changing the J gate and you see the plug there.

 

Suppose the problem is due to the trans shift cable... changing the J-gate would not help.

Check those 2 bolts holding the cable are present and not loose

 

Which side of the gearbox is the cable? Will I need to jack the car up to view it? After rereading my post I realised that I hadn't put that the TCM will not comunicate. My scanner can see it but when I try to go into it. It comes back no comunication. I am praying that my TCM isn't knackered.

 

About 1:20 here

 

Thankyou I will go and check later this afternoon.

 

Well I had a little tinker with the car earlier. I haven't checked the cable under the car yet as It was getting dark. While checking fuses and relays I descovered that the starter relay has lost its negative feed. Once I put a nagative feed to the relay car fires up on the key no problem. I still have no lights on the J gate and still stuck in park.

 

Have you checked the fuses in the primary junction box? This is the small fuse panel inside the cabin, just outboard of the driver's feet (RHD) near the door hinges.

Specifically, please check fuses F1 and F15. You can see details here, figures 02.3 and 04.1:

http://www.jagrepair.com/images/Auto...cal-2006on.pdf


Pages 13 and 14 show the location of this fuse panel and the numbering. If I'm reading the wiring diagrams correctly, fuse F15 will kill the lights on the J-gate and the power to unlock the shift lever.

 

Hello Karl I have been reading a thread you advised on two years ago. I have checked fuse F15 in the interior fusebox. I haven't checked fuse F1 yet. F15 has power to it as does F33 in the engine fusebox. I did find F1 in the engine fusebox was not making a good contact. I have now cleaned that. One thing I did notice and I am not sure why it happened it was either when I was playing with the interior fusebox or the engine one I noticed the brake lights had come on. I diconnected the switch on the pedal but it made no difference. I turned the ignition off and then on again and it fixed itself.

 

I noticed an apparent oversight in your latest reply. You forgot to say, "I checked both fuses as you suggested and you're a genius. All is good now. You are amazing. I feel like I'm a better person just for having made your acquaintance." Feel free to use your own words, but you should go back and edit that.

Not quite sure what to suggest otherwise. Do check that remaining fuse F1 in the primary junction box. And definitely check those two bolts, as previously suggested.

Are your brake lights working properly now? IIRC, the same switch also feeds the lock release solenoid for the shift lever. I don't believe this would explain the lack of indicator lights, but it's worth checking in case you've got more than one fault active.

You mentioned a loose fuse F1 under the hood. That feeds the dynamic stability system, so can't see how it's related to the present problem.

Have you seen this thread?:

https://www.jaguarforums.com/forum/s...solved-224309/


Very similar symptoms, the fault was a broken ground wire.

 

That is the thread I have been reading.The weather here is terrible today so I will have to wait until tomorrow to attempt any repairs. The brake pedal has two switches on it. They both seem to be working fine.What is the best way of testing the earth points on this car?

 

Sorry I mean't to add the brake light work fine now.I don't know what caused it but it was like they were gettind fed power from another source. I even unplugged the brake switch and they stayed on.Turning the ignition off and on again fixed it.

 

I just read that thread again. Sounds like he found a bad ground wire somewhere in the right rear fender area, but that didn't appear to be the actual fix. What he did find was low voltage on the wire from fuse F33 (under the hood) to the TCM. He repaired a damaged section and then all was good.

He didn't specify, but apparently he was doing some basic voltage and ground checks at the connector to the TCM. That is probably how he found it.

 

Good shout Karl I have read that thread over ten times and missed that important detail. I will go and do a few voltage checks myself.