ABS/ASC lights on

[billysally208]

Hi, Just bought my 2000 1.9 Z3 out of storage – got the ABS and ASC lights on the dash. I know this is well documented on the internet but I am a bit confused with the codes I have got using the C110 reader.

The codes are:-

• 93 -Engine intervention via CAN
  
  
• 98 ASC button
  
  
• 71 ABS pump – motor fault
  

To start with I will remove the ABS sensors and clean them and the rings, as this seems to be a common cause – just wondering about the other codes, quite happy to replace the ABS pump if necessary but could the ASC button be the problem? Only work done prior to winter storage was replacing all four brake discs/pads and shoes, but didn't have any reason to interfere with the ABS sensors,.



Any ideas anyone – Thanks in anticipation.

 

[Ianmc]

Codes appear linked. The sensors are normally replaced with the brake work, likely the problem.

 

[Antm72]

The abs motor fault in my case was the abs module common fault with bad solder joints.
I went through the sensor codes to no resolve.
The abs switch fault is odd do they just return after they are cleared ?

 

[billysally208]

Wouldn't have thought it was necessary to replace the ABS sensors when changing the brakes or even disturb them

 

[billysally208]

The abs motor fault in my case was the abs module common fault with bad solder joints.
I went through the sensor codes to no resolve.
The abs switch fault is odd do they just return after they are cleared ?

Yes, they come back on straight away after clearing them - did you repair the solder problem yourself?

 

[Antm72]

It can be done but the module is sealed.
Does your abs module unbolt from the pump via 4 torx bolts ?
The pump is powered by the module via a long stem out of the module i assume it breaks the solder at the base giving a motor fault it could be the motor i suppose .
I replaced mine part number matching it turns out the light but until coded does not fix it.

 

[Antm72]

You can see the pronged pump feed above its the solder joints that normally fail but it depends on the unit to weather it can be fixed.

 

[billysally208]

Thanks for your replies - yes four torx bolts hold it together - so if I replace the whole unit. it needs to be programmed/coded to the car

 

[littlefeller]

this old chestnut again, think we have all had this at some point, real pain in the. yes it will need coding for it to actually work, but without coding it will turn the light off, just wont have asc, you may think oh well do i need it, but then you wouldnt want to be thinking this while heading for that tree sideways thinking bugger if only i had fixed my asc, though this is unlikely but sods law though. assuming its the module at fault. its the most likely cause, match the part number of the module not the pump, think there is just one digit different between the two. i found one off an e46 (couldnt find one when searching for a zed one, except stupid priced ones, dont be conned, if you check part numbers on any of the modules you will find that the same ones are on quite a few different bmw) so long as it has the same number it will be fine (assuming it doesnt have the same fault). they can be sent off and repaired, check out your part number and post it on here.

 

[billysally208]

this old chestnut again, think we have all had this at some point, real pain in the. yes it will need coding for it to actually work, but without coding it will turn the light off, just wont have asc, you may think oh well do i need it, but then you wouldnt want to be thinking this while heading for that tree sideways thinking b***** if only i had fixed my asc, though this is unlikely but sods law though. assuming its the module at fault. its the most likely cause, match the part number of the module not the pump, think there is just one digit different between the two. i found one off an e46 (couldnt find one when searching for a zed one, except stupid priced ones, dont be conned, if you check part numbers on any of the modules you will find that the same ones are on quite a few different bmw) so long as it has the same number it will be fine (assuming it doesnt have the same fault). they can be sent off and repaired, check out your part number and post it on here.

Thats it

 

[littlefeller]

thats the pump code, the module will end 768 , have a butchers

 

[littlefeller]

if you put just the part number into ebay there are quite a few most around £25, if you try z3 they will be twice that for the same thing.

 

[littlefeller]

like this one
http://www.ebay.co.uk/itm/bmw-3-ser...073369?hash=item1c80728619:g:P78AAOSwdGFY1V-k

 

[littlefeller]

or e46
http://www.ebay.co.uk/itm/BMW-E46-3...505768?hash=item3ad4b180a8:g:VrAAAOSw44BYTEZ3

same part number/ same thing.

 

[billysally208]

thats the pump code, the module will end 768 , have a butchers

It's dark - the numbers 34-51-6751-768

 

[littlefeller]

yes thats correct, you need a copy of ncs expert to code it.

 

[billysally208]

Thanks @littlefeller - I'll try the sensors first - is it worth taking the cover off the module to see if there are any loose or dry solder joints as suggested above.

 

[littlefeller]

its sealed, you have to cut through it, the usual place they fail is the power feed going into the pump, it goes from the board inside through the module and out of the back into the pump, its just solder joints onto the board, they do fail after a while (poor design really)

 

[littlefeller]

i started a thread somewhere, think it just simply titled ASC, there is a pic on there where they usually fail. if you fix the old one it does save the coding, though the coding only takes about 20 sec.

 

[littlefeller]

found it
https://zroadster.org/threads/abs-asc.12579/