Hello all,
When I start my 94, the ABS and the Brake warning lights come on
and stay on for maybe 2 minutes–a good deal longer than with other
vehicles I’ve driven, but they always go off after I’ve driven a
few yards. Anything to be concerned about, or is this just as XJS
characteristic?
Clay–
Titanium 2001 XJR (X308), Topaz 1994 XJS 4-liter
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In reply to a message from DiscipleC sent Thu 30 Sep 2004:
Im no expert since my car doesnt have ABS but on other cars with
ABS it would seem logical that if the lights go out there isnt a
permanent fault. If there were the light would stay on.
The ABS does perform a self test/calibration on startup on all abs
vehicles perhaps something is worn thats delaying this process,
though it is achieving an acceptable result after the 2 mins? Its
usually dirty sensors or loose connections 9 times uot of 10.–
DjDemonD http://www.selectaradio.com - 1988 XJS v12 5.3 HE
Bristol, United Kingdom
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In reply to a message from DiscipleC sent Thu 30 Sep 2004:
Mine is a '94, does exactly the same thing - completely normal.
As long as the lights go out - no problem.–
Greg '94 XJS 6L V12 Coupe
Manchester, United Kingdom
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In reply to a message from Greg Mackintosh sent Thu 30 Sep 2004:
If the car has been sitting a while, or you have pumped the brake
pedal with the key off, it could take 2 minutes to fill the
accumulator ball to the proper pressure (to turn off the light), if
it takes 2 min. every time you start the car (like if it’s been
sitting only an hour or so) I think there may be a problem. I
believe there is a spec for how often the pump comes on and runs
when just sitting, I would look into that. Also the accumulator
ball should be replaced at some point probably after 10 years or so
it may have lost some of it’s nitrogen charge.
Dave–
The original message included these comments:
Mine is a '94, does exactly the same thing - completely normal.
As long as the lights go out - no problem.
–
Penfold99
Atlanta, GA, United States
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In reply to a message from Greg Mackintosh sent Thu 30 Sep 2004:
…mine is a 94 also, and when driving every day the first startup
in the morning my lights go out after about 15 seconds. I replaced
the ‘‘ball’’ a few years ago when I got the car though, and did a
complete brake fluid change/bleed. I wasn’t having any problems,
but I was very careful about making sure ALL of the fluids were
fresh and new.
Dave–
The original message included these comments:
Mine is a '94, does exactly the same thing - completely normal.
As long as the lights go out - no problem.
–
Penfold99
Atlanta, GA, United States
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In reply to a message from Penfold99 sent Thu 30 Sep 2004:
Had exactly the same with both a 94 XJ40 I had and with my present
88 XJS. have been reliably informed ‘‘nothing to worry about - don’t
panic!’’–
Barry Langley 1988 XJS V12 Convert, 1955 Conquest Century
Chichester, United Kingdom
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That was exactly the situation I experienced with my '91 - a new accumulator
solved the problem and the illuminated red light and occasional flickering
of the warning light disappeared. At the time that marked a bit more than 10
years use on the original accumulator.
I also can confirm that today when the car sits for a week or so without
use, the red light takes maybe 20 or so seconds to turn off as the
accumulator fills or pressurizes (a bit longer than the amount of time it
takes for the oil pressure to rise fully on the guage). Otherwise, the light
never comes on that I notice.
From: “Penfold99” penfold99@comcast.net
If the car has been sitting a while, or you have pumped the brake
pedal with the key off, it could take 2 minutes to fill the
accumulator ball to the proper pressure (to turn off the light), if
it takes 2 min. every time you start the car (like if it’s been
sitting only an hour or so) I think there may be a problem. I
believe there is a spec for how often the pump comes on and runs
when just sitting, I would look into that. Also the accumulator
ball should be replaced at some point probably after 10 years or so
it may have lost some of it’s nitrogen charge.
Dave
The original message included these comments:
Mine is a '94, does exactly the same thing - completely normal.
As long as the lights go out - no problem.
Steve S.
Lexington, MA USA
'91 xj-s v12_________________________________________________________________
Don�t just search. Find. Check out the new MSN Search!
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In reply to a message from DiscipleC sent Thu 30 Sep 2004:
Mine is a '95 and I had the ABS lights sometimes staying on
upto 3 or 4 minutes after starting the car and also
occasionally for a minute or so while driving. After I got
my rear brakes done (pads and rotor replaced), this problem
disappeared - now it comes on along with the brake warning
light at first startup only for about 12 to 15 seconds.–
The original message included these comments:
When I start my 94, the ABS and the Brake warning lights come on
and stay on for maybe 2 minutes–a good deal longer than with other
–
xjs95-4-cvt
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I checked my red brake light this morning to see how long it stayed
illuminated. Car ('91) hadn’t been started in 8 or 9 days. The brake light
illuminated for 14 seconds.
From: “xjs95-4-cvt” jawa@ieee.org
In reply to a message from DiscipleC sent Thu 30 Sep 2004:
Mine is a '95 and I had the ABS lights sometimes staying on
upto 3 or 4 minutes after starting the car and also
occasionally for a minute or so while driving. After I got
my rear brakes done (pads and rotor replaced), this problem
disappeared - now it comes on along with the brake warning
light at first startup only for about 12 to 15 seconds.
Steve S.
Lexington, MA USA
'91 xj-s v12_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it’s FREE!
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In reply to a message from DiscipleC sent Thu 30 Sep 2004:
Guys, thanks for all your good adivce on this issue. For now, I’ve
decided to just keep an eye on it. I’m also going to get the brake
fluid flushed and replaced next week. Given the many little things
the PO had let go, I doubt that’s been done in a long time.
Clay–
The original message included these comments:
When I start my 94, the ABS and the Brake warning lights come on
and stay on for maybe 2 minutes–a good deal longer than with other
vehicles I’ve driven, but they always go off after I’ve driven a
few yards. Anything to be concerned about, or is this just as XJS
characteristic?
–
Titanium 2001 XJR (X308), Topaz 1994 XJS 4-liter
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If I recall properly I think you have to reset the memory to remove the
code.
Try disconnecting the battery and see if it clears when reconnected.
Just a thought.
LaRue Boyce
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In reply to a message from LaRue Boyce sent Sat 26 Feb 2005:
Disconnect the negative side of the battery!–
Rob Wade
Windsor Ontario, Canada
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OK, hurrying to work a few mornings ago I went over a rough RR
crossing going much faster than usual, got the ABS light just as I
hit it. It was 5:30 AM and all the other warning lights were out
(for once!) and I noted the light as I hit the tracks. So it did
not go out with a restart and has been on three days, so I guess
waiting for to just fix itself is not going to happen. I know each
wheel has its own pick-up and suspect a bad wire or connection. Is
their any way to test to see which one or do I have to pull each
wheel? Each pick up is different so that would require four
separate new leads and they are not cheap!
Want my brakes working right, also if I have to pull parts are
there any upgrades for the 94 coupes? I do have 17 inch wheels and
would not mind a bigger front disk.
Dan
1994 6.0L coupe.–
DanS
columbus ga. usa, United States
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In reply to a message from DanS sent Tue 5 Feb 2013:
Do a search on this forum as I have posted here . The abs
has a three pin plus near it and when shorted will flash
the abs light to indicate the stored fault code.–
95 XJR6, 94 XJS 6.0 coupe, 04 XK8 ,99 Ka
Croydon , SURREY, United Kingdom
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In reply to a message from 540itouring sent Tue 5 Feb 2013:
I did a short check of the old post but did not see anything on
trouble shooting it, will look farther back. The ABS does not
flash and there is no code on the clock. Dan–
The original message included these comments:
has a three pin plus near it and when shorted will flash
the abs light to indicate the stored fault code.
–
DanS
columbus ga. usa, United States
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Hi Dan,
I guess that means you either work or live on the wrong side of the
tracks 
There is a procedure in the Jaguar Service Manual at Section 70.00.00
for performing “blink code” access on your Teves III brake system. Let
me know if you don’t have the Service Manual (everyone SHOULD get it,
together with the Parts Catalogue and Electrical Guide from JDHT for ~
$25) and I will send you the information.
Generally, there is a test connector with three sockets, next to the
ABS ECU on the right side of the boot (remove the left trim pad for
access). You want to put a jumper between (1) the socket that has the
Black wire, and (2) the socket that has the Brown/Pink wire as
described below:
(1) with the key in the off position, insert a piece of solid wire,
such as locking wire, bent in the shape of a “U”, in the Black wire
socket, and the Brown/Pink wire socket.
(2) With pen & paper in hand to record the blink codes, sit in the
driver seat and turn the key to the run position but do NOT start the
engine. Watch the Amber ABS light at the top-left of the warning
indicator row, and ~ 6 seconds after turning the key on, it should
begin to blink.
(3) Count and record the blinks.
(4) Repeat the procedure to make sure you read & recorded the codes
correctly.
Each code is two-digit, such as 31 for front left sensor and 32 for
front right sensor. The “blink code” 31 would look like 3 blinks,
approximately one per second, a pause for ~ two seconds, and then one
blink. If there is a second two-digit code (and there usually is), it
will begin 6 seconds after the second digit of the first code. There
are many possible codes, the two listed above just being perhaps the
most common.
The most likely cause of the light being on is that one of your front
ABS sensor cables has failed, most likely open circuit, due to cable
shield fatigue after the outer rubber insulation has cracked.
Please let us know what you find and we can suggest some further steps.
George Balthrop, Clifton, VA USA
89 and 85 XJ-S Coupes; 89 XJ40 VDP-----Original Message-----
From: DanS dhs@navyskydoc.com
OK, hurrying to work a few mornings ago I went over a rough RR
crossing going much faster than usual, got the ABS light just as I
hit it…it did not go out with a restart and has been on three days
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CORRECTION: That should read “next to the ABS ECU on the LEFT (US
driver’s side) of the boot (remove the left trim pad for access).”
It was late 
George Balthrop, Clifton, VA USA
89 and 85 XJ-S Coupes; 89 XJ40 VDP-----Original Message-----
From: George Balthrop <@GBalthropXJS>
Generally, there is a test connector with three sockets, next to the
ABS ECU on the right side of the boot (remove the left trim pad for
access).
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In reply to a message from George Balthrop sent Wed 6 Feb 2013:
OK, in the 94 6.0L coupe the left trunk where the CD player is I
have a white flat plug with the three wires, so I jumped the
black/brown-pink wires and when you turn on the key the ABS light
is out and then I got the code. I got a 3-2 on three different
tries so that would be the Right Front pick-up SU12242 by WELLS
Electronics and is carried by AUTOZONE. So I guess I will order one
and put it in!
Thanks to George for the help.
Dan–
The original message included these comments:
CORRECTION: That should read ‘‘next to the ABS ECU on the LEFT (US
driver’s side) of the boot (remove the left trim pad for access).’’
–
DanS
columbus ga. usa, United States
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