[Mk2] [NA] rev3 abs problem

[mr k's mister2]

hiya guys, im new here so sorry if this has already asked a million times!!

problem started a week or so back, the abs is coming on everytime just before the car comes to a stop, i've stripped and serviced all 4 calipers incase 1 was binding or anything but that hasnt solved the problem, all fluid has been replaced and the full system has been bled up including the master cylinder. the abs fault light isn't coming on either.
has anyone else had this problem or got any ideas whats causing it at all?
cheers

[Quigonjay]

hi and welcome to imoc
if the good members of this club cant solve your problem, nobody can
is the ecu giving any error codes?

[mr k's mister2]

its in for the ecu checking on tuesday/ wednesday work permitting so hopefully that should shed some light on the subject cos i'm at my wits end with the fecking thing.

also if anyone has a rev 3 offside rear suspension strutt going spare i've got a good home for one!

[Quigonjay]

it takes 2 minutes mate to check the error codes with a paper clip mate

[nailmonkey]

When you say the abs comes on, do you mean the light on the dash?

Could be some crap in the abs trigger wheels in the hubs?

Nik

[mr k's mister2]

nah the abs light doesnt come on, it just trips the abs in at the last minute as if a wheel was locking on a wet road or something. the pedal flaps around etc and the abs system makes its usual noise!!

as for checking ecu codes i didnt think i could do this unless the abs light was coming on? which ecu do i need to check for the abs system, the 1 under the bonnet (front end! lol) or the engine hatch? and is it just a case if putting a paperclip across the terminals and counting the lights?

[nailmonkey]

Strange, I thought the light was supposed to come on when the ABS is activated?

Nik

[mr k's mister2]

i thought it came on if the abs system wasn't working?!?

[Stefen]

Sounds very like a sensor issue. As to how to diagnose which one it is:

Either swap a good sensor for each in turn, and try it out.
Or
Maybe there is some way to take a reading from the ABS ecu or ABS unit to see which channel is being triggered?

The first way probably would be the handiest, the second would be the most interesting.

[nailmonkey]

Hi,

Found this in the BGB;

http://www.mr2-tech.com/bgb/mechanical/ ... system.htm

HTH,

Nik

[mr k's mister2]

cheers mate, i've had a read thru and it looks like the info i have on cd rom, gonna get it plugged into diagnostics tomorrow night after work and see if i can get a code from the ecu. im thinking its a sensor or a sensor rotor to be fair due toclipping a kerb a few weeks back, only thing is it didnt affect abs at all when it happened it started a few days later???