HDC Not Available System Fault

[Michael99b]

First, I have searched the forums but did not find anyone who tried to fix this and got it resolved. Here is my issue.

I have a 2013 LR4 with about 30k miles. Yesterday I got an error message that said "HDC Not Available System Fault". I also got "Emergency Brake Assist No Available" and "Stability Control Not Available Drive Carefully". I suspect the later two are a result of the HDC message. Yesterday was the coldest day of the season thus far at about 33 degrees F.

From reading the forums some have replaced the battery, others have replaced the brake light switch, and some have done both. However, they all seem to have the error messages reappear within a few days or weeks.

Has anyone received these same messages and actually fixed the issue?

Thanks, Mike

 

[umbertob]

Did all these faults pop up at startup (most likely a weak battery) or while you were already driving?

 

[Michael99b]

The HDC message popped up while driving and then the others came up a few minutes afterward. Thereafter, the messages are not present when I initially start the engine, but they all pop up after a few minutes of driving.

 

[umbertob]

Well, that should exclude the battery from the equation...

 

[Michael99b]

Can anyone offer other suggestions? Thanks.

 

[ryanjl]

You might try searching on disco3.co.uk, which probably has the most tech advice of any forum. Here are some threads that came up when I searched for "HDC not available."

http://www.disco3.co.uk/forum/search.php?search_keywords="HDC+not+available"&search_fields=all&search_author=&search_forum=-1&return_chars=200&search_cat=-1&sort_by=0&sort_dir=DESC&show_results=topics&search_time=0

This thread opines that it's probably a wheel-speed sensor or maybe a weak battery:

http://www.disco3.co.uk/forum/topic144016.html?highlight=HDC+available

(For problems like these, the LR3 and LR4 probably share the same troubleshooting).

 

[Michael99b]

Thanks for the links. I'm bringing it to the dealer tomorrow as I am still under warranty. I just like to know before I go in there what the issues may be so I can talk knowledgeably about it and make sure they are fixing the correct things. I'll report back regarding the results.

 

[Michael99b]

Alignment was way off. One pressure monitor sensor was dangling. Likely hit a *** hole and through things out of whack. Alignment done, pressure monitor replaced. Error messages are off. If the messages come back I will update the post.