ABS Unit

Riekert · Post by **Riekert** » Thu Jun 19, 2008 10:07 am

Hey guys... my abs unit is making a funny noise... like a grrrrr sound.

Checked the brake fluid level and that's still fine... So I'm gonna bleed the brakes because there might be an air bubble in the system(thanx Q).

But any other suggestions will be appreciated...

300sx · Post by **300sx** » Thu Jun 19, 2008 10:28 am

does your abs light on the dash stay on?

if so, could be a abs-ecu fault.. there is a way to read the fault codes off the abs controller i think (mine has failed before)

rat · Post by **rat** » Thu Jun 19, 2008 10:31 am

my light stays on sometimes, have to turn off then on a few times then comes right?

Riekert · Post by **Riekert** » Thu Jun 19, 2008 10:43 am

300sx wrote:does your abs light on the dash stay on?

if so, could be a abs-ecu fault.. there is a way to read the fault codes off the abs controller i think (mine has failed before)

yeah sorry forgot to mention that the ABS (Anti-lock) light on the dash stays on. I had to remove the positive off the battery last nite cause it would not stop even after i turned the ignition off.

rat wrote:my light stays on sometimes, have to turn off then on a few times then comes right?

Tried that a few times while driving home last nite... no change...

300sx · Post by **300sx** » Thu Jun 19, 2008 10:58 am

ouch.. not lekker

if that light on the dash stays on, it can only be electric.. either a wiring fault has occured somewhere, some of the support hardware (sensor ect.)
has failed, or the ecu(abs) itself has failed.. in my case it was the ecu itself that had failed. replacing it cured the problem

Daniel · Post by **Daniel** » Thu Jun 19, 2008 11:08 am

Its probably just the relay acting up, when u hear the noise pop the bonnet and listen around the ABS unit, i think theres 2 relays in that black box. Then just hit it, it should stop.

I do remember finding a replacement relay a few years back, but after banging it iv'e never had the problem again and subsequently forgot the part No.

Riekert · Post by **Riekert** » Thu Jun 19, 2008 11:13 am

300sx wrote:ouch.. not lekker

if that light on the dash stays on, it can only be electric.. either a wiring fault has occured somewhere, some of the support hardware (sensor ect.)
has failed, or the ecu(abs) itself has failed.. in my case it was the ecu itself that had failed. replacing it cured the problem

Well now that's lovely!! (in the most sarcastic way i can type it!)

F*#K that kinda sux.... crap! ok I'll just have to check whats going on over the weekend!

300sx · Post by **300sx** » Thu Jun 19, 2008 11:19 am

if tapping the relay dont work, time to checkum them error codes..

the abs-ecu is located behind the driver , above the wheelwell.. take the rear side finisher off, after driving at least a minute over 30km/h, keep engine on and running.

count the flashes

error codes are in the handbook

good luck!

Riekert · Post by **Riekert** » Thu Jun 19, 2008 11:20 am

Daniel wrote:Its probably just the relay acting up, when u hear the noise pop the bonnet and listen around the ABS unit, i think theres 2 relays in that black box. Then just hit it, it should stop.

I do remember finding a replacement relay a few years back, but after banging it iv'e never had the problem again and subsequently forgot the part No.

hopefully its that and not the alternative...

Riekert · Post by **Riekert** » Thu Jun 19, 2008 11:21 am

300sx wrote:if tapping the relay dont work, time to checkum them error codes..

the abs-ecu is located behind the driver , above the wheelwell.. take the rear side finisher off, after driving at least a minute over 30km/h, keep engine on and running.

count the flashes

error codes are in the handbook

good luck!

Thanx I'm gonna need it!

300sx · Post by **300sx** » Thu Jun 19, 2008 11:27 am

i feel your pain..

keep us updated..

300sx · Post by **300sx** » Thu Jun 19, 2008 11:32 am

my light stays on sometimes, have to turn off then on a few times then comes right?

this sounds like a relay..

HancoB · Post by **HancoB** » Thu Jun 19, 2008 11:40 am

I know the Mercs have a probe on the caliper and if not connected well the abs light comes on. Maybe thats something to look into...

Usually its those stupid little things that you struggle your ass off to fix and its so small and infront of you that you keep on missing them.

widowmaker · Post by **widowmaker** » Thu Jun 19, 2008 11:41 am

talking out me arse here, but maybe the sensor on the wheel is clogged?

i dont really believe myself here, but just chucking in things to check

HancoB · Post by **HancoB** » Thu Jun 19, 2008 11:50 am

That can very much be widow...you are a wise arse...sorry have a wise arse!