abs light staying on always? diagnostics

1. Aaron Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............

   #1 27th October 2010, 16:22

   i did the resistant test
   and found one which was 1600 ohms
   so i changed it to a 1000ohms one.
   
   my abs is still always on.
   when ignition it doesnt turn off after 4 seconds just always stays on...
   
   ideas?
   does it need to be drove a good amount of miles?
   or need to be removed diagnostically?
2. Woody91 Established Member Joined: Jun 2008 Coseley, West Mids Posts: 1267 306 D-Turbo

   #2 27th October 2010, 16:31

   Check for continuity(sp) to the abs module if you have already changed the sensors if they are ok then try a diagnostics machine. If that still doesnt cure it then unfortunately your looking at a new abs module.
3. burgerfeet Infrequent Poster Joined: Oct 2010 Bridgend Posts: 231 VTS 2002 - well the Mrs does

   #3 27th October 2010, 17:35

   Quote:

   Originally Posted by Aaron i did the resistant test and found one which was 1600 ohms so i changed it to a 1000ohms one. my abs is still always on. when ignition it doesnt turn off after 4 seconds just always stays on... ideas? does it need to be drove a good amount of miles? or need to be removed diagnostically?

   If all sensors are good, the light will go out by itself. Check the charging voltage; if it is too low, ABS light will not go out.
4. Fubsy Infrequent Poster Joined: Mar 2010 Worcestershire Posts: 148 Citroen - Saxo VTS Vauxhall - Corsa

   #4 27th October 2010, 21:32

   they should read 1600 ohms or around there stick a 1000 ohms in would make it worse, check them all from the plug under the abs unit under the bonnet this runs out any breaks in the wires back to the abs sensors and no you dont need to drive far for it to reset I did however unplug the battery for a few mins before driving it around the block but mine went off before I got off the driveway.
   
   Regards
   Fubsy
5. Aaron Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............

   #5 27th October 2010, 21:37

   they work when the resistance is between 1000 ohms and 1100 ohms
   
   not 1600 that usually means there out
   all my readins where 1000 to 1100 par from drivers front
   which i changed and now im getting same reading throughout....
6. Fubsy Infrequent Poster Joined: Mar 2010 Worcestershire Posts: 148 Citroen - Saxo VTS Vauxhall - Corsa

   #6 27th October 2010, 21:37

   heres a picture from another forum unless u've already seen it http://www.saxosportsclub.com/Forums.../p=937434.html
   
   And apparently they should be 1100 ohms :/
7. Fubsy Infrequent Poster Joined: Mar 2010 Worcestershire Posts: 148 Citroen - Saxo VTS Vauxhall - Corsa

   #7 27th October 2010, 21:38

   a higher ohm would not cause a problem its below 1000 that would cause problems.
8. Fubsy Infrequent Poster Joined: Mar 2010 Worcestershire Posts: 148 Citroen - Saxo VTS Vauxhall - Corsa

   #8 27th October 2010, 21:43

   mindya saying that it would still be out so I retract my previous post. Dont sure where I got 1600 from but Im quite sure my brand new sensors where higher than 1100 ohms shall have to check
   
   Regards
   Fubsy
9. Aaron Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............

   #9 27th October 2010, 22:08

   hmmm,
   going to get it on the diagnostics and go from there. ill let u know how i get on
   but all my resistance measurements are basically the same lol
10. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

    #10 27th October 2010, 22:19

    Will probably need to take it to Citroen mate - OBD2 doesn't diagnose ABS faults.
    
    Were you checking the resistance using the pins on the plug behind the battery?
    
    When I replaced a dodgy sensor on mine, I only had to drive a few metres to the end of the street before the ABS light went out.
11. Aaron Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............

    #11 27th October 2010, 22:21

    my obd2 reader from my 3 plug dont work on my single plugger gay.
    
    it should do on his! lol
    i drove down street and it didnt change....
    and yep checking resistance there.
    but i havent drove the car for about 1 month so could be the battery? but doubt to be honest!
    not sure what else it could be to be honest
12. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

    #12 27th October 2010, 22:23

    If all four sensors are reading between 1k and 1.1k ohms and light is still on after driving a mile or so, must be something else causing the problem.
    
    Not sure whether it can recognise stuff like a dodgy ABS pump etc.
    
    EDIT: Is the car a single plug? If so, the pins are different.
    
    
    
    

    Quote:

    Red Front (side unknown) Blue Front (side unknown) Yellow Rear Passenger Green Rear Drivers.

13. Aaron Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............

    #13 27th October 2010, 22:27

    http://www.saxosportsclub.com/Forums.../p=937434.html
    
    yep single plug
    my ports are like the post on ssc(first post mate)
14. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

    #14 27th October 2010, 22:30

    Ah right, must be MK1 and MK2 ABS wiring that differs rather than single plug and 3 plug.
    
    If the sensors are ok, I don't think I'd bother with the hassle of changing the ABS unit. Junk it.
15. Aaron Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............

    #15 28th October 2010, 19:16

    Bummmppp
    Had on diagnostics
    It said code 209 nd ecu defect?????