I have three warning lights now instead of the fifty recently. They are HDC unavailable, DSC unavailable and emergency brake unavailable.
The common factor here is the ABS system of course BUT I have no ABS warning and the wheel sensors are all ok.
I have seen from the IID tool that if you change a master cylinder or brake cylinder than there is some reset procedure. All I have ever done is bleed the brakes.
Is it possible that bleeding has led to this, whatever it is, and causing the ABS to throw an error?
thanks

 

Do you have the IID tool? If so you should read the faults and see what they tell you. Until you have the fault codes you're in the dark.

 

Agree-looks like the number of lights you’re getting has been reduced, so clear and check the codes again - see what’s remaining. Aside from ABS, these systems might be on the same comm, so when one goes down, you might get a light on all three. I know people have reported these lights caused by ABS sensors (which you say are fine), brake light switch, transmission control module, and emergency brake module. You’ve posted about the ebrake module in the past - is the ebrake working as it should?

I can’t imagine bleeding the brakes would do anything, although brake fluid is highly corrosive, so if you got some on an electrical connection - that could do something.

 

Thanks for the reply and to Pagoda, yes I have the IID.
I kind of promised LR that I would not use the IID after they cleared everything, reset and update the BCM and PCM and swore there was nothing to be fixed. However, after their work I get the lights but fewer of them. I posted this new thread because all I can see as a common factor is the ABS or , as you mention, perhaps a common line.
I mentioned the ABS since IID says you need to run some routine IF you change parts and I was wondering if the bleeding could have put the ABS out of whack.
The ebarke works, the brake light switch ie new and the ABS sensors work ok.
I should be taking it back to LR tomorrow though it pains me and now they ought to be able to narrow it down. They reset BMS too btw but didn't do anything I had not already done frankly.
All they told me was that if it lit up, stop, get out, lock, wait 5 mins and restarts and go. Yes this works, but why?

 

No idea why that little routine works to clear the problem, but it seems to be a very temporary fix. Good luck, and let us know what LR finds.

 

You can use the IID tool to read faults without any problem at all. You should do that and post back. If the dealer is working with you on this then you may decide not to clear them if you’re going back to them. Or, read them and clear them and see if they come back in which case you’re no worse off. These vehicle can produce random one-off faults that once cleared, don’t come back. I’m some instances they couldn’t be caused by low battery, etc.

Personally, I’d read them and see what you learn. If relevant I’d then clear them and see what happens next.

 

Here we are:

ABS-Brake Module

U0126-00 (E8) Lost communication with steering angle sensor module
( on 19-03-2022 08:30:25 at 61921 km )

U0132-00 (28) Lost communication with ride level control module
( on 19-03-2022 13:19:59 at 61927 km )

BCM-Body Control

B1B01-87 (28) Key transponder - Bus signal/message failure - missing a message
( on 19-03-2022 09:34:08 at 61927 km )

IPC-Instrument Pack

U0128-00 (28) Lost communication with parking brake control module
( on 15-03-2022 07:44:43 at 61893 km )

RLM-Suspension

U0416-68 (24) Invalid data received from vehicle dynamics control module - Algorithm based failure - event information
( on 19-03-2022 08:30:34 at 61921 km )

Current mileage is 61927

Lost comms with the steering angle sensor seems weird since it indicates correctly via IID. I did not clear them so we shall see what LR say

 

Steering angle sensor seems to be the first error on 3/19. It has been reported to cause these kinds of issues, e.g.: https://www.landroverworld.org/threa...8/#post-220513

 

The garage read the faults and they seem to think it could be due to the steering sensor but are not sure! When I test it with live values on IID it shows the angle and seems to work but of course it could be an intermittent physical fault or a CAN connection or something. they will call me today and undoubtedly propose changing it and undoubtedly when I try it I will have the same faults..
I would do it myself bu getting the part here is impossible.
The car is in perfect condition. 40K miles and mint and always garaged and rarely taken out when it rains so corrosion etc is pretty unlikely.

I told them it was useless as a car and that if it could not be fixed at a reasonable cost I would take it to the breakers. They did not disagree!!

 

For reference, the car uses the Bosch V8 ABS system which uses and needs these sensor:

A DSC switch.
An HDC switch.
An HDC relay.
A stoplamp switch.
Four wheel speed sensors.
A yaw rate and lateral acceleration sensor.
A steering angle sensor.
Warning indicators; four on vehicles with a high line instrument cluster and five on vehicles with a low line
instrument cluster.
A hydraulic control unit (HCU) with attached ABS module.


Any one of them can throw things out of whack...