Hi,

As an XKR owner, this is my first posting in the XJS forum. However, I'm helping out a few local club members with XJS HVAC issues, and I'm planning on building myself simple test tool for the Delanaire system (basically a small computer that I can plug in series with the original controller to monitor all the inputs and outputs so I can monitor what is going on and display on a small screen. So far I've been doing that with a multi-meter, but that is painful and there's always the risk of shorting something out.

Does anyone know what the connectors are on the Delanaire 'Piano' module (a part number or manufacturer), or where I can buy them?

Alternatively...if anyone had an old, non-functional module (and also the car wiring that plugged into it) that would be really helpful (I could make my own harness to 'insert' my test computer between the car and the module). I'm happy to pay a small amount to cover shipping etc, but don't need a working module!!

Thanks,
Steve

(also, as I'm here - if you are having issues with JEPC, feel free to check out the replacement software I wrote - https://jpart.org/index.html )

 

or,

i think i have a dealership delenair system test unit somewhere in the workshop

 

Wow...read about those in the Delanaire Manuals, never actually saw one!

I believe that is for testing the earlier models (pre '87) that had the servo and the amplifier. It would be useful to have one, but at the moment I'm working on later cars that have the digital control module (Delanaire III and IV). My plan is to use something like an Arduino or similar inexpensive micro computer to monitor all the wiring to/from the control module, and display the results on a screen and then perhaps also drive some of the flap motors and solenoids for additional testing.

-Steve

 

Delanaire III vs IV?
I didn't know any XJSs had a MK IV.
Do you know when they started?
I have a MY 1996 (build date Aug. 1995) and I thought it had a MK III.

 

The hookup cables for the Piano module are part of the PDU setup. We can send a pic if you wish.

 

I have tested pin status in the past and used salvaged computer system connectors. Can't remember details but most likely old IDE cables/connectors and just made pigtails of the wires. The pin pitch was close enough though the job a little tedious.

 

That would be good - especially if there's any kind of part number or manufacturer name on there.....Thanks!

 

That's an idea - I have some old PC IDE cables around; I'll check those though I think the holes are smaller....

 

That is probably my error, but (in my defense!) the intro to the "Mk III Climate Control" manual is confusing...

It states "The Mark III climate control system used in the XJS Range is very similar to the Mark IV System..."

I had thought that this was odd - it implied that for some reason Mark IV came BEFORE Mark III on the XJS. I'm guessing the Mark IV was used on other Jaguars, not the XJS, explaining this?
I had noticed there were different part numbers for the 'piano' module over the years, so assumed that perhaps some were "Mark IV" and some were "Mark V". Apologies if I caused confusion....

-Steve

 

have you got this ?

BB

 

Fixer here you go. Part numbers match with the numbers in the PDU catalog. Good hunting. Seems to work on both styles of Piano module.

Front

PDU manual

Back

 

Yes - I do have this, but thanks!!

 

Thanks - excellent reference. I need to make some cables just like that...I need to identify those white plastic connectors (or find a junk piano module and car to remove them from)

-Steve

 

My understanding, FWIW, is that the MkIV system was used on the XJ40 sedans. If that's true then it would've been in use circa 1986/87...about the same time that the MkIII systems were being installed in the XJS (and Series III V12 cars).

The MkIII system rec'd minor changes over the course of the years and there were at least a couple sub-variations depending on year and specific model application. For one example, at some point convertibles got a version with a different module and wiring than the coupes, pertaining to compressor operation. And at some point a 'vent' or 'economy' function was added. But it was still a MkIII system.

Cheers
DD

 

For the Mark III the Electrical Guide specifies 3X 15 pin JST connectors. Take a look at their catalog.

It looks like maybe the PHR series: JST PHR-15 or XHP series: XHP-15 or EHR series EHR-15. (Digikey has these)

What's the measured pin-pitch? (where I think you'll find the difference between series)

https://www.digikey.com/en/products/...es-america-inc
https://www.jst.com/

From the 94' Elec Guide:

~Paul K.

 

Thanks! I hadn't realized that "JST" was a connector manufacturer! I have just bought an (inexpensive) Climate Control Module on eBay - it probably won't work, but it will give me something to work with and measure/test connectors (I don't have an XJS here to play with, and it's probably best to experiment with a spare first anyway). Might even remove the connectors from the board and reuse for connecting to a test board. I want to be able to (easily) view all the input/outputs to the module at one time - I think that will make troubleshooting a lot easier than using the multi-meter.

 

Will be interesting to follow this project and see how you get on. I could see it being quite useful. Thanks for the JPart software btw! Very useful!

~Paul K.

 

I received my used Climate Control Piano module today, so have been able to carefully examine the connectors. It looks like they are JST 15 pin XH Series (Datasheet). Even better, I realized that the module in the car comes with three 'extra' plugs you can remove (these are the same as the ones on the car wiring harness (JST XHP-15). I think they are there to make it easier to probe with a meter and NOT short out the contacts (which can apparently be fatal to the controller). The good news is that I could use these spares to make up a cable to a test computer. Just need to find terminals and crimp tool, though Digikey sell already made wire pigtails with the same terminals (SXH-001T-P0.6N) that should plug in - that's less expensive than finding the correct crimp tool, though it might be nice if I can cut a section of the harness from a junk car (so the colors match!)

 

There are a good number of JST crimp tools on Amazon FYI so should be easy to get one of those. And there are even kits with the crimper tool + terminals & some selection of XH housings. A quick look showed bits in the sub $30 range to $40 with terminals & housings.

~Paul K.