[xj-s] Trip Computer

In reply to a message from Charles sent Tue 6 Apr 2004:

I only panick when the low fuel warning light comes on, but I
rarely get this far.

With sky-rocketing gas prices, I find myself buying less gas for
more money, and therefore, keeping less fuel in the tank. $30
bought me a measly 16.14 gallons this weekend. As a result, I have
found that I can drive at least 37 miles at speeds ranging from
stop-and-go, to 90 mph once my ‘‘low fuel’’ light comes on. I suspect
that I could milk several more miles out of the tank before she
finally sputters, and dies, but I dont want to push my luck too far.

Scott Watts–
84XJ-S(JagZilla)ported heads,TransGo,Flowmaster/Monza
Mississippi, United States
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But isn’t that backwards Scott? Shouldn’t you keep it full
so that you don’t have to fill up after prices go up yet again?

Oh, and expect to get very little sympathy for $1.85/gallon.
You’re doing OK in Mississippi!!

(You can always hedge against rising fuel prices by buying Halliburton
stock)

Richard Drozdowski
1992 XJS-4.0L

In reply to a message from Charles sent Tue 6 Apr 2004:

I only panick when the low fuel warning light comes on, but I
rarely get this far.

With sky-rocketing gas prices, I find myself buying less gas for
more money, and therefore, keeping less fuel in the tank. $30
bought me a measly 16.14 gallons this weekend. As a result, I have
found that I can drive at least 37 miles at speeds ranging from
stop-and-go, to 90 mph once my ‘‘low fuel’’ light comes on. I suspect
that I could milk several more miles out of the tank before she
finally sputters, and dies, but I dont want to push my luck too far.

Scott Watts


84XJ-S(JagZilla)ported heads,TransGo,Flowmaster/Monza
Mississippi, United States

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In reply to a message from Richard Drozdowski sent Wed 7 Apr 2004:

Richard,

At about $45 per tank, this starving artist cant afford a fill-up.
I realize that gas prices are a little lower in Mississippi,
Especially compared to what our UK friends pay, but, it is still a
significant increase. This time last year, I was complaining about
$1.57 per gallon. Just out of curiousity, what are some of the rest
of you paying per gallon?

Scott Watts–
84XJ-S(JagZilla)ported heads,TransGo,Flowmaster/Monza
Mississippi, United States
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Scott wrote:
“…what are some of the rest of you paying per gallon?”

Well here in Toronto we are paying about $0.80 cnd a litre for super (92
octane)which converted to the imperial system would be around $2.37 us a
Gallon! So a tank full of 80 litres would cost $64.00 cnd or $49.00 us and
at a fluctuation of 10% on gas prices within a week it would mean a $6.40
cnd or $4.90 us savings per tank (lunch money at a fast food restaurant). I
would say it’s hardly worth taking the chance of running out of gas.

Foti Hatzidemetriou
Toronto, Canada
1992 Jaguar XJS V12

“Today is the tomorrow we worried about yesterday” Anon

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I have a 1994 xjs. The Trip/computer works fine, but the lights on
the right side of the unit with the buttons are out. I have
brought this problem to several places. They are telling me the
blub can not be replaced, that the whole unit must be replaced.
It does’nt make any Sense. Now the light on the climate control
where you set the temp. is out. and they are telling me the same
thing the bulb cannot be replaced
Any suggestions–
mike Russo
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At 20:14 2004-06-14 +0200, mike Russo wrote:

I have a 1994 xjs. The Trip/computer works fine, but the lights on
the right side of the unit with the buttons are out. I have
brought this problem to several places. They are telling me the
blub can not be replaced, that the whole unit must be replaced.

Well, if memory serves, the bulbs are soldered in. They’re not intended to
be user-replaceable, but if the unit works, certainly you needn’t buy a
whole new unit to get the bulbs replaced - just take it to a competent
electronics person.

It does’nt make any Sense. Now the light on the climate control
where you set the temp. is out. and they are telling me the same
thing the bulb cannot be replaced

They’re on ludes about the second bit - these are lit via fibre optics and
a bulb unit referred to as an “opticell”. It’s a conventional bulb in a
device which retains all the fibre optic lines.

Search the ARCHIVES for opticell.

— '88 Jaguar XJ-SC 5.3L V12 (LHD) ‘Black Cat’
Sean Straw '85 Jaguar XJ-S 5.3L V12 (LHD) ‘Bad Kitty’
Marin County, California '91 Jaguar XJ40 4.0L (LHD) ‘Trevor’
http://jaguar.professional.org/ '69 Buick GranSport 455 V8

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In reply to a message from sean.straw%2BJaguar@mail.professional.org sent Mon 14 Jun 2004:

and take your Jaguar somewere else…–
The original message included these comments:

brought this problem to several places. They are telling me the
blub can not be replaced, that the whole unit must be replaced.
Search the ARCHIVES for opticell.


Maximillian - XJR-S
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In reply to a message from mike Russo sent Mon 14 Jun 2004:

I think the JEC magazine published an article by a guy who
repaired the trip computer himself, detailing how he got the board
out of the box etc. If you fancy a go I’ll see if I can dig it out?

al mcl–
almcl
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I did a search and didn’t find an answer so here it goes…In my
1985 XJS you set the time on the trip computer using time and reset
keys. I tried that on the 1992 and it didn’t work is it the same,
or is there a different way to set it? It keeps time I just can’t
set it. Also radio says *** code *** and of course the tag on hood
can’t be read so of to dealer for that. Does anybody know can the
dealer cut keys from the VIN?? I have ignition key but no door keys
also do they need VIN or serial number from radio for code??

Thanks in advance
Kerry–
kerryHoffman
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In reply to a message from kerryHoffman sent Wed 16 Feb 2005:

Kerry:

Having the keys cut at your dealership really depends on how
competent your dealer is. In fact, my local dealer has lost this
ability over the last few years. They will only cut the Tibbe keys -
like your ignition key.

I have a customer who just purchased a '91 XJS Convertible from a
local Jag retailer. It ,too, only came with the ignition key. The
head gasket blew immediately, so I figured while it was in my shop
and the guy was spending a fortune, I’d do him a favor by getting
the keys made. Since these cars are getting old, you never know
what locks may have been changed, so I removed the glovebox lock
and checked the key code on the back to make sure it matched the
storage compartment, gas door and trunk. It did. Luckily, one of
the keys to my XJSC fit the doors. I went to the dealer, they told
me they could no longer get these key blanks, so I took the
glovebox lock to a competent locksmith, had a key cut and it
wouldn’t work in any of the other locks (the car was at my shop).
It appears the commercial blank for this lock is not quite a
perfect fit. I have many XJS keys and began trying the non valet
keys, found one that would go in all the way, but wouldn’t turn. I
gave the locksmith the key he made and my real key as an example of
the correct key blank ( about .003 thinner than the replacement).
He’s trying to find some OEM keys and I’m still waiting.
Fortunately, the owner is now able to use the door lock key which
will lock the trunk also. This didn’t use to be such a pain.

Your radio code is simpler. Pull the radio, get the serial number
off the back and your dealer should be able to look it up for you
over the phone.

Can’t help you with changing the time on your clock. I always have
to check the owner’s manual for that. My cars are all pre '90.–
the Pro from Dover
washington d.c., United States
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I have an '85 XJS that the Trip Computer just quit working. It
worked fine until I started the car this morning and it
reads ‘‘8.8.8.8’’ across the display. Tried the RESET button, that
didn’t work. Tried depressing every Function Button and nothing
works. Also have more than one Function Button illuminated at the
same time. Anyone have any ideas???

TIA–
wolak8756
Audubon, Penna, United States
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Unplug it, wait a minute, plug back in. I’ve heard of this method working
before…

Doug Dwyer
Longview, Washington USA
1987 Ser III XJ6
1988 XJS V12From: “wolak8756” rwolak@verizon.net

I have an '85 XJS that the Trip Computer just quit working. It
worked fine until I started the car this morning and it
reads ‘‘8.8.8.8’’ across the display. Tried the RESET button, that
didn’t work. Tried depressing every Function Button and nothing
works. Also have more than one Function Button illuminated at the
same time. Anyone have any ideas???

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In reply to a message from wolak8756 sent Fri 10 Feb 2006:

thanx for the replies.

i’ll try your suggestions tomorrow and let you know what happens.

bob–
wolak8756
Audubon, Penna, United States
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Can anyone help?: while trying to find the source of a slow battery
drain I removed each of the fuses in term as recommended elsewhere
in this forum. NOw that I have put them back again I find the trip
computer doesn’t work. The back light illuminates but there are no
numbers. I have changed the fuse to no avail. Have I destroyed the
computer?–
David Anderson
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I have replaced the clock in my 95 XJS 4.0 with a trip computer
from a 94 XJS. I was able to program the clock time and the
odometer function works,however the speed,mpg(ml/km?)does not
work.Not to sure what to do now however it does look nicer then the
stock clock.Also the push button lights to the left of the display
do not light up. What is involved in replacing them? The trip
computer is P/N? LRY141, DAC7362R.–
Dan Garrison 1995 XJS 4.0
Boise, United States
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In reply to a message from mr2dan sent Sat 4 Nov 2006:

You have the correct computer pn DAC7362. The wood panel is BEC8386
for those others who may be looking and was $177. at the dealer.
I had to drive a few miles when converting mine from clock to
computer to get data and info on the display. The buttons light up
independent of the display. There are two tiny bulbs that backlight
the display on top of the computer. Never checked how the buttons
light as never had a problem with those, my display lights or
doesn’t depending on its mood. If you haven’t driven it yet you
need to.

Lee Murray '95 4.0 Convertible–
The original message included these comments:

I have replaced the clock in my 95 XJS 4.0 with a trip computer
from a 94 XJS. I was able to program the clock time and the
odometer function works,however the speed,mpg(ml/km?)does not
work.Not to sure what to do now however it does look nicer then the
stock clock.Also the push button lights to the left of the display
do not light up. What is involved in replacing them? The trip
computer is P/N? LRY141, DAC7362R.


LeRoy Murray
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As most of you probably know, trying to find a manual xjs in good
condition isn’t the easiest thing to do but I am doing it. I have
found one but it doesn’t have a trip computer. If I wanted to fit
one, how easy would it be to do (eg are the wires behind the
clock)?–
Speedyxjs
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I imagine it may depend on the vintage.

A number of years ago, automobile manufatcturers realized it was
cheaper to build one wiring harness, than to build a different version
for every possible configuration.

Had the door of my 95 GMC truck apart over the weekend to replace the
driver’s door mirror. Although my truck is as about as plain as they
come, there inside the door was the wiring for the electric mirrors
and power windows. (Neither of which have ever been installed in the
truck.)

Presuming the wiring is there, you would also need to ensure that it
is hooked up on the other end, to whatever sensors are needed.On 7/23/07, Speedyxjs speedyxjs@yahoo.co.uk wrote:

As most of you probably know, trying to find a manual xjs in good
condition isn’t the easiest thing to do but I am doing it. I have
found one but it doesn’t have a trip computer. If I wanted to fit
one, how easy would it be to do (eg are the wires behind the
clock)?

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Still having problems with the trip computer which is reseting
almost every times I start the car and giving some erratic
readings. After doing the fault diagnostic from the service manual
i found that all the voltages seems ok except that the yellow and
green lead to the interface unit. Does that mean the interface is
the problem?
Also it says to check the voltage at the green lead to the pulse
generator. Is the pusle generator the same as the speed interface?
if not where is it located?–
Jean
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I had noticed my fuel consumption was progressively improving over the last
few months, but when it got to an average 26 mp(UK)g in mixed town/country
driving, I stopped believing in fairies and did some checking.

Fuel used shown on the computer agrees near enough with brim/brim filling.
The odometer readings concur with the same journeys in our other modern
cars.
There was a time when computer and odometer agreed on distance. Now the
distance travelled shown on the computer differs from the odometer between
plus 7% to plus 21% - it is never a lesser figure than the odometer, and
never settles to a constant variation.
I, like many others I’m sure, use the mpg figures as a general indication of
how the engine is performing, and it would be useful to have that facility
again. Has anyone any ideas as to how I might cure this?
Thanks in advance.
Ian Stanford, Co. Waterford, Ireland
1990 V12 Coupe

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