Have a look at this thread on Jag-Lovers. There is an extensive discussion on reverse engineering Zytek diagnostic units, and it explains the differences between Zytek ecus used across a number of Jaguar cars. First issue is the ecu connector, which is a 7 pin round female on the Zytek unit itself (...

Unfortunately this interface box will only work with those on the TWR cars, the XJR-15, XJ220 and XJRS. I only have the software for the XJR15 and the XJ220. I've been in touch with Continental engineering (the old Zytek) in the UK. They are going to get back to me about any spares they have, but I'...

And I've been speaking with Zytek UK for months already and have gotten nowhere. Apparently they are very busy with OEM stuff and have no time to dig up 25 year old schematics.

I recently acquired what is probably the last Zytek diagnostic kit on the planet. I have both the dealer diagnostic software and the dealer 4 pin connector (apparently JaguarSport did not want dealers monkeying around with the ecu). I also have the factory programing software with the 5 pin connecto...

And as time goes on this will become more and more important. Now that people are driving these cars again because there are new tires, faults will inevitably pop up. And without a diagnostic kit and the correct software you will have to physically check every component being monitored (I believe th...

I figured it out, but apparently limited to 3 images per post. Interface box (can be blue or silver): Interface_top.jpg Side view of interface: Interface_side.jpg Side view of interface Interface_side_partnumber.jpg SPD1039 is the correct part number for the interface. The cables are SPD1038 and SPD...

I have been emailing back and forth with an executive at Zytek who was at TWR when the xj220s were being built. I asked if there were any more diagnostic kits in someone's drawer or whether Zytek could build a few more kits. They still have an xj220 test area. His response was that he was keen to do...

I followed the instructions to insert an image. Obviously didn't work. How do you get an image into a post?

I believe that reverse engineering old ecus and developing communications hardware/software for old Range Rovers and Triumphs made sense financially because there are so many of them. Only 280 xj220s (approximate) and I don't know how many XJR-S cars were made in total, and JaguarSport only distribu...

From everything I've read, it is impossible to connect to the Zytek unit without the blue interface box. Other ecu makers also did this many years ago, something about computer communications protocols back in the late '80s/early '90s. And those boxes, which came in a blue plastic kit from JaguarSpo...

I'll take the cable for the xj220. Is the software for the 220 as well?
I know the cable alone won't work, but I'll find an interface somewhere....I hope.

Kindly PM me at ssjsolomon@aol.com with price and shipping to NY. Thank you.

Sorry to revive an old topic, but more of the XJ220's are coming into the USA every month now that the 25 year rule allows us to import them with only "safety" inspections every year (except in California where they still must meet emissions testing). I am in the midst of recomissioning a 220 I rece...