Delanair Mk III Introduction/Testing Manual
#21
No.
But I'm very glad you asked as it was stupid of me to not mention what years are covered.
Perusing the schematics it looks like this manual would cover '87-'91 cars. After that the fundamentals of the system seem to be the same but there are a couple significant changes to the electrical architecture which would surely change the electrical testing procedures.
I'll try to research an exact breakpoint since "model year" is always vague on these cars....but I think "pre-facelft" is a safe assumption.
For owners of '86-87 build date cars the easiest way to identify if your car has the Mk II or Mk III system is the temp control knob. The Mk III system has the "pull for manual control" feature.
Anyhow, sorry that this manual wouldn't be of any use to you.
Cheers
DD
But I'm very glad you asked as it was stupid of me to not mention what years are covered.
Perusing the schematics it looks like this manual would cover '87-'91 cars. After that the fundamentals of the system seem to be the same but there are a couple significant changes to the electrical architecture which would surely change the electrical testing procedures.
I'll try to research an exact breakpoint since "model year" is always vague on these cars....but I think "pre-facelft" is a safe assumption.
For owners of '86-87 build date cars the easiest way to identify if your car has the Mk II or Mk III system is the temp control knob. The Mk III system has the "pull for manual control" feature.
Anyhow, sorry that this manual wouldn't be of any use to you.
Cheers
DD
I have a scanner and would be glad to scan it to pdf and return it to you to post if that helps.
#22
93 XJS Trying to fix Climate Control System
Hello Doug and Steve,
Many thanks for the help. I got the Mk iii operating manual and its very helpful. If you have anything else I will keep an eye out for it.
My problem is that the control unit seems to be working in part as when I increase the cooling temp to max at 65 degrees t he fan speeds up.
However, the flap to the defroster is stuck open and the flap to the center vents and side vents blows no air at all.
I had a problem with leaf build up under the front hood unit that lead to water flowing into the car just above the climate control unit. By the time I found the cause it had happened several times when washing the car but only after a delay of say 2 to 3 minutes while the tub filled up and then overflowed into the car.
I suspect that the activators have likely become corroded and jammed so that the flaps do not work when the control unit calls for closing the defroster and allow cool air to flow into the central vent and below.
In winter I get hot air only and can not turn down the heat. or mix more outside air with the heater air to cool it down. I suspect that the control is jammed or not operating properly .. that is the slide switch under the radio
I have a traditional muli meter so I can test things but I am not sure its digital. The readings are via a led type display not a manual clock like meter.
Thanks again. Any backpround on how to get into the area and fix the problem would be useful
mattaco
Many thanks for the help. I got the Mk iii operating manual and its very helpful. If you have anything else I will keep an eye out for it.
My problem is that the control unit seems to be working in part as when I increase the cooling temp to max at 65 degrees t he fan speeds up.
However, the flap to the defroster is stuck open and the flap to the center vents and side vents blows no air at all.
I had a problem with leaf build up under the front hood unit that lead to water flowing into the car just above the climate control unit. By the time I found the cause it had happened several times when washing the car but only after a delay of say 2 to 3 minutes while the tub filled up and then overflowed into the car.
I suspect that the activators have likely become corroded and jammed so that the flaps do not work when the control unit calls for closing the defroster and allow cool air to flow into the central vent and below.
In winter I get hot air only and can not turn down the heat. or mix more outside air with the heater air to cool it down. I suspect that the control is jammed or not operating properly .. that is the slide switch under the radio
I have a traditional muli meter so I can test things but I am not sure its digital. The readings are via a led type display not a manual clock like meter.
Thanks again. Any backpround on how to get into the area and fix the problem would be useful
mattaco
#23
#25
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leep123 (07-08-2022)
#28
Many thanks.
It says "The ECM has been revised to accommodate
new functions and improve temperature stability
and consistency of settings"
Are the test points shown in the "Delanair MKIII Introduction" manual still valid or have the pin numbers changed with the new ECM?
It says "The ECM has been revised to accommodate
new functions and improve temperature stability
and consistency of settings"
Are the test points shown in the "Delanair MKIII Introduction" manual still valid or have the pin numbers changed with the new ECM?
#29
Join Date: Mar 2008
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Steve, I'll bet you're just the person to clarify something for us.......
At some point a Delanair Mark IV system was introduced. I've always thought it was for the XJ40 but I gather that later XJSs used it as well. It looks very similar to the Mark III system.
When the info you provided (above) started showing revisions circa 1993-94 I was expecting to see some mention of the Mark IV....but was disappointed.
Can you tell us which cars used the Mark IV system?
Cheers
DD
#30
Many thanks.
It says "The ECM has been revised to accommodate
new functions and improve temperature stability
and consistency of settings"
Are the test points shown in the "Delanair MKIII Introduction" manual still valid or have the pin numbers changed with the new ECM?
It says "The ECM has been revised to accommodate
new functions and improve temperature stability
and consistency of settings"
Are the test points shown in the "Delanair MKIII Introduction" manual still valid or have the pin numbers changed with the new ECM?
Cheers,
#31
Steve, I'll bet you're just the person to clarify something for us.......
At some point a Delanair Mark IV system was introduced. I've always thought it was for the XJ40 but I gather that later XJSs used it as well. It looks very similar to the Mark III system.
When the info you provided (above) started showing revisions circa 1993-94 I was expecting to see some mention of the Mark IV....but was disappointed.
Can you tell us which cars used the Mark IV system?
Cheers
DD
At some point a Delanair Mark IV system was introduced. I've always thought it was for the XJ40 but I gather that later XJSs used it as well. It looks very similar to the Mark III system.
When the info you provided (above) started showing revisions circa 1993-94 I was expecting to see some mention of the Mark IV....but was disappointed.
Can you tell us which cars used the Mark IV system?
Cheers
DD
Cheers,
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Doug (02-01-2015)
#33
Steve in France, Hi,
Please describe what "MEDIAFIRE" is. Sounds intresting.
I may still have a copy of a Delanaire II manual, also a Delanaire III.
I'll look for them.
I'm currently on the search of data for my 2004 XK8 VDP.
I have subscribed to alldatadiy.com but they are sort of sketchy on some of their info.
Jag Nut, PDX Oregon
Please describe what "MEDIAFIRE" is. Sounds intresting.
I may still have a copy of a Delanaire II manual, also a Delanaire III.
I'll look for them.
I'm currently on the search of data for my 2004 XK8 VDP.
I have subscribed to alldatadiy.com but they are sort of sketchy on some of their info.
Jag Nut, PDX Oregon
#34
Ok folks, here's Doug's Delanair III manual. Turns out I had the silly thing in my cabinet all along, too! I think I may have some other tech info to add to it in a short while; I'll get to it as soon as I can.
Make sure you get a copy Doug! And thanks for bringing this up.
Cheers,
Make sure you get a copy Doug! And thanks for bringing this up.
Cheers,
Thanks for this, O compiler of great and needed information!
Now, my challenge is putting the info to right use!
I struggle with stuff like this 🤣
#37
You can remove the "cheek panel" on the right side of the center console, and also the underscuttle panel below the right side of the dash (under the glove box on LHD cars) to get access to the MkIII ECM and it's pins. These photos are from my '87 SIII V12 with the MkIII system. The ECM has an extra set of pins that don't connect to anything, they are just there for testing purposes. I purchased some of these digikey products to place over the pins to prevent shorting when making contact with the multimeter probes. But I think I bought them from ebay for a lot cheaper than this. From memory, the pins are numbered 1-45 with 1 being the highest and 45 being the lowest/bottom.
https://www.digikey.com/en/products/...87175-3/352970
Before removing underscuttle panel
The silver testing pins are lined up vertically in the white plastic channel
stock photo of ECM removed from car.
https://www.digikey.com/en/products/...87175-3/352970
Before removing underscuttle panel
The silver testing pins are lined up vertically in the white plastic channel
stock photo of ECM removed from car.
Last edited by Noah; 07-08-2022 at 01:21 PM.
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petemohr (07-08-2022),
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