96 XJS ABS brake light
#1
96 XJS ABS brake light
To All,
SYMPTOM
1. car starts up all lights go off.
2. Start up acceleration and at @ 20mph the ABS LIGHT GOES ON…..EVERYTIME!
3. LIGHT does not come on at 10mph or idle speed driving down street.
4. Upon hard stop (30 to 40mph) sometimes brakes pull left…..Sometimes seems to work perfectly…NO PULL…..STRAIGHT STOP. DID THIS A BUNCH OF TIMES TO SEE IF I COULD DETECT ANY POTENTIAL FAILURE MODES.
I have tried reading up on this but my attention span is lacking.
I don’t get the feeling that I am in any immediate danger if I continue to drive….I really slammed the brakes on hard during testing.
YOUR THOUGHTS ON POSSIBLE ISSUES ARE APPRECIATED.
Softball60/Paul
SYMPTOM
1. car starts up all lights go off.
2. Start up acceleration and at @ 20mph the ABS LIGHT GOES ON…..EVERYTIME!
3. LIGHT does not come on at 10mph or idle speed driving down street.
4. Upon hard stop (30 to 40mph) sometimes brakes pull left…..Sometimes seems to work perfectly…NO PULL…..STRAIGHT STOP. DID THIS A BUNCH OF TIMES TO SEE IF I COULD DETECT ANY POTENTIAL FAILURE MODES.
I have tried reading up on this but my attention span is lacking.
I don’t get the feeling that I am in any immediate danger if I continue to drive….I really slammed the brakes on hard during testing.
YOUR THOUGHTS ON POSSIBLE ISSUES ARE APPRECIATED.
Softball60/Paul
#2
If you had a device that could read Jaguar ABS Codes, that would tell you exactly what is causing the light. Anything else is a shot in the dark.
Having a device that can pull Jaguar specific codes, like ABS and Transmission would probably pay for itself after one read. Apparently iCarSoft makes Jaguar specific readers that have been confirmed to pull ABS codes. I would look into one of those.
Having a device that can pull Jaguar specific codes, like ABS and Transmission would probably pay for itself after one read. Apparently iCarSoft makes Jaguar specific readers that have been confirmed to pull ABS codes. I would look into one of those.
#3
#4
#6
Pete,
Thanks for the response
Several months ago I flushed out the brake fluid.
Is it possible I have some air in the system…….MAINLY IN THE LOW PRESSURE SIDE OF THE ABS MECHANISM.
Could that be why it pulls sometimes and sometimes not.
If it worth a shot do you know how to properly bleed the low side of the ABS VALVE BLOCK?
I am willing to take a shot at bleeding this of possible AIR OR CRUD?
Softball60/Paul
Thanks for the response
Several months ago I flushed out the brake fluid.
Is it possible I have some air in the system…….MAINLY IN THE LOW PRESSURE SIDE OF THE ABS MECHANISM.
Could that be why it pulls sometimes and sometimes not.
If it worth a shot do you know how to properly bleed the low side of the ABS VALVE BLOCK?
I am willing to take a shot at bleeding this of possible AIR OR CRUD?
Softball60/Paul
#7
The Teves Mk IV system does not require special bleeding procedures. See the second post here for the factory instructions:
https://forums.jag-lovers.com/t/can-...-iv-abs/424001
Jon
https://forums.jag-lovers.com/t/can-...-iv-abs/424001
Jon
Trending Topics
#8
jalapeño,
Thanks for the information. I will try and digest.
Basically if I want to bleed the ABS low pressure side I should try the following steps.
1. Low pressure would be the two lines coming from the brake fluid sump leading to the incoming side of the ABS OF THE ABS BLOCK LOCATED UNDER THE ABS PUMP.
2. Bleed each line separately just as you would IF YOU WERE BLEEDING FLUID at the caliper. PUMP TO HARD PEDAL..OPEN THE BRAKE LINE TUBE FITTING TILL FLUID BLEEDS OUT AND THEN TIGHTEN BACK UP BEFORE RELEASING THE BRAKE PEDAL.
3. DO THE OTHER BRAKE LINE SAME PROCEDURE.
QUESTION: Should the ignition be or the engine running or should the bleeding procedure be accomplished with ignition OFF
Thanks
Paul
Thanks for the information. I will try and digest.
Basically if I want to bleed the ABS low pressure side I should try the following steps.
1. Low pressure would be the two lines coming from the brake fluid sump leading to the incoming side of the ABS OF THE ABS BLOCK LOCATED UNDER THE ABS PUMP.
2. Bleed each line separately just as you would IF YOU WERE BLEEDING FLUID at the caliper. PUMP TO HARD PEDAL..OPEN THE BRAKE LINE TUBE FITTING TILL FLUID BLEEDS OUT AND THEN TIGHTEN BACK UP BEFORE RELEASING THE BRAKE PEDAL.
3. DO THE OTHER BRAKE LINE SAME PROCEDURE.
QUESTION: Should the ignition be or the engine running or should the bleeding procedure be accomplished with ignition OFF
Thanks
Paul
#9
#10
#11
#12
#13
Paul,
Every ABS problem that I can recall reading on this forum has related to the earlier Teves system, not the Mk IV fitted on very late XJS such as yours. In general, the Mk IV system is very reliable, hence why we don't hear about any owner problems. All teh complex bleeding procedures and technical problems that you have read here relate to the earlier system.
As I recall, there was a hardware and software system that enabled the Mk IV system to be fully bled by forcing actuation of the ABS valves whilst bleeding. I don't know of anywhere in the UK that might have that setup. But because of its use in other US cars, you might find a specialist over your side that has such equipment.
I would start by trying a general flush of the fluid with new fluid and see how you get on.
Cheers
Paul
Every ABS problem that I can recall reading on this forum has related to the earlier Teves system, not the Mk IV fitted on very late XJS such as yours. In general, the Mk IV system is very reliable, hence why we don't hear about any owner problems. All teh complex bleeding procedures and technical problems that you have read here relate to the earlier system.
As I recall, there was a hardware and software system that enabled the Mk IV system to be fully bled by forcing actuation of the ABS valves whilst bleeding. I don't know of anywhere in the UK that might have that setup. But because of its use in other US cars, you might find a specialist over your side that has such equipment.
I would start by trying a general flush of the fluid with new fluid and see how you get on.
Cheers
Paul
The following users liked this post:
kevinbbtaylor2013 (10-20-2022)
#14
#15
#16
#17
Do you have a 1995.25? A 1995 XJS has a Teves III system, which is a different system.
#18
#19
The Note under General instructions says "Always bleed the caliper furthest away from the actuation unit first. On left-hand drive vehicles bleed Front Right, Front Left, Rear Right, Rear Left."
The "actuation unit" Is on the front right side of the engine bay so wouldn't the Rear Left be the furthest away? Seems backward to me.
Am I missing something?
#20