ABS/DSC Light Issue - BMW M5 Forum and M6 Forums
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post #1 of 21 Old 13th April 2019, 06:21 PM Thread Starter
espritv8
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ABS/DSC Light Issue

Hi guys,

Recently bought an 2002 E39 M5 with 90K miles. Drove around 200kms in December, then stored it, until last week.

During storage, I made some basic maintenance on it. Flushed the brake fluid with the motive brake pressure bleeder. Previous owners seem to never had done maintenance on this because there was some gooey stuff that came out from the calipers.

So last week, after driving less than 5 miles, the ABS/DSC lights came on. It will go off after turning the car off, but randomly comes back usually after driving only a few miles. I will also light up when the car is stationary.

INPA gave me the following codes:
- Brake switch 105
- pressure sensor 114
- steering angle sensor 103

Cleared them and drove some more, lights came back, and now getting only the 114 code.

When lights are off, ABS and DSC works fine. Activating valves and pumps with INPA makes noise so I guess it' all working fine. Brake pads are good too.

What should I look for to pinpoint the problem? Could it be that some of the old fluid interferes with the system? Did I get air in the system? (pedal is firm though)

Also I've installed the shark injector that came with the car, could it be the issue?

Thanks!
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Last edited by espritv8; 13th April 2019 at 06:26 PM.
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post #2 of 21 Old 13th April 2019, 07:22 PM
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Which light or lights were on initially exactly? The ABS and the separate DSC light? There's an orange BRAKE light, a red PARK BRAKE light, an orange ABS light and the DSC-off symbol light.

Which light or lights are on after "clearing" them?

Have you checked the brake fluid level in the reservoir?

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post #3 of 21 Old 13th April 2019, 09:02 PM Thread Starter
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Quote:
Originally Posted by josiahg52 View Post
Which light or lights were on initially exactly? The ABS and the separate DSC light? There's an orange BRAKE light, a red PARK BRAKE light, an orange ABS light and the DSC-off symbol light.

Which light or lights are on after "clearing" them?

Have you checked the brake fluid level in the reservoir?
It's the same lights that are coming on. DSC off, ABS and the exclamation mark next to the abs.

Didn't check the fluid yet but when I had the flush it was ok. I'll later today.
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post #4 of 21 Old 13th April 2019, 11:38 PM
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The engine tune won’t have anything to do with the DSC fault.
If your brake fluid was that bad, I’d probably start with replacing the pressure sensor.

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post #5 of 21 Old 14th April 2019, 12:21 AM Thread Starter
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post #6 of 21 Old 14th April 2019, 01:13 AM Thread Starter
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Originally Posted by Rosie View Post
The engine tune won’t have anything to do with the DSC fault.
If your brake fluid was that bad, I’d probably start with replacing the pressure sensor.

Yeah but sensor is 200$. Wish I could pinpoint the issue first.

Maybe I can remove it and clean it with brake cleaner?
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post #7 of 21 Old 14th April 2019, 02:35 AM
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Quote:
Originally Posted by espritv8 View Post
Maybe I can remove it and clean it with brake cleaner?

Can’t hurt.


Quote:
Originally Posted by espritv8 View Post
Yeah but sensor is 200$. Wish I could pinpoint the issue first.

Maybe try a junkyard one first.
They’re easy to get to and remove and really don’t fail often.

It is in all of these models:-



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post #8 of 21 Old 15th April 2019, 12:01 AM Thread Starter
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Ok so I'll try cleaning it first and I suspect I may have air in the abs system.

Not sure how to bleed the abs with INPA? Any hints? Made a search and nothing usefull came up.
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post #9 of 21 Old 15th April 2019, 02:01 AM
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Originally Posted by espritv8 View Post
Not sure how to bleed the abs with INPA? Any hints? Made a search and nothing usefull came up.

INPA doesn’t have the bleed routine program for an E39.
Only DIS or ISTA D does in the “Service Functions” menu but they’re really difficult to get working.

It also needs to be done with a pressure bleeding connected at the same time.

https://www.newtis.info/tisv2/a/en/e...lation/AryWRXx
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post #10 of 21 Old 15th April 2019, 02:08 PM Thread Starter
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Quote:
Originally Posted by Rosie View Post
INPA doesn’t have the bleed routine program for an E39.
Only DIS or ISTA D does in the “Service Functions” menu but they’re really difficult to get working.

It also needs to be done with a pressure bleeding connected at the same time.

https://www.newtis.info/tisv2/a/en/e...lation/AryWRXx
Well, that's a real pain. I have INPA and BMW scanner. Wish those 2 could at least do that simple task.
Under the ABS menu in INPA there's options to open the system valves and activate pump. There is no procedure to get the air out using these options?

I don't have DIS and really hope to avoid dealing with it. It has been a pain already to have the INPA and bmw scanner running on my laptop.
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