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#1 Sabre46

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Posted 03 May 2012 - 02:40 PM

After sorting out my Water pump rattle Ive now got a problem with my ABS ( had this issue for a long time really) THe ABS seems to want to come on at all speeds of braking even walking pace.

Its been on a diagnostic but with no clear results. Any ideas?

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#2 IanXT4

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Posted 03 May 2012 - 06:20 PM

Can you elaborate what you mean by "a diagnostic" and is this a 1992 RAV4 as per your details?

#3 shcm

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Posted 03 May 2012 - 07:06 PM

Cracked tooth ring perhaps? Odd, because as part of the self-test, there's very often a wheelspeed test/check on each wheel as the vehicle moves off after ignition on. i.e. to simplify it a bit, that all wheels have roughly the same speed.

It must think one wheel is moving slower/faster or locking with respect to the others to generate an ABS event.

#4 Sabre46

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Posted 04 May 2012 - 11:35 AM

Can you elaborate what you mean by "a diagnostic" and is this a 1992 RAV4 as per your details?


Its a 1998 2lt Petrol.

By diagnostic I mean the bloke at the garage plugged it in to a diagnostic machine and it "diagnosed" the fault codes. I am trying to up load a print out of the readings. Ill post it up once I have managed to do it. here is the link to the photo og the diagnostic report http://yfrog.com/g0cz5ggvj

#5 IanXT4

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Posted 04 May 2012 - 12:31 PM

Hi
You mentioned in your previous post
"Its been on a diagnostic but with no clear results."

What made your "bloke at the garage" not investigate the cause of fault codes, did they successfully clear and not come back ?

#6 Sabre46

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Posted 04 May 2012 - 12:50 PM

He was doing another job for me at the time - another vehicle- so I asked if he wouldnt mind running the diagnostic on the RAV as I had this problem with the ABS. He said that when he ran the scan It didnt show anything up but when he printed the result this is what it printed. I dont really understand how these things work and dont really understand what the print out is saying other than a load of things seem to be wrong at the same time, which is unlikeley.

I know I can check the speed sensors with a Multi Meter but can I also check the reluctors in the hubs? Could it be a bit of crap in the hub preventing a clear read by the speed sensor. Just to be able to find out which wheel to look at would be a start!

Thanks for your help

#7 jedi134

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Posted 04 May 2012 - 12:57 PM

My freelander pulsated the ABS all the time when the FR sensor was not in properly, it was too far out of the hub..............ABS would come on under normal breaking.

Could also be a bit of rust in there?

#8 anchorman

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Posted 04 May 2012 - 01:50 PM

You can't test the rings with a multimeter but you might be able to see them if you get down close and turn the wheel. Like shcm I think that one of them is split or damaged.

I really don't think your RAV ABS is posh enough to be able to store fault codes.

#9 Sabre46

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Posted 04 May 2012 - 01:56 PM

You can't test the rings with a multimeter but you might be able to see them if you get down close and turn the wheel. Like shcm I think that one of them is split or damaged.

I really don't think your RAV ABS is posh enough to be able to store fault codes.



I meant that you can test the speed sensor with a multi meter using the Ohms setting to check the resistance.

As for storing codes you may well be right but if you take a look at the picture of the read out, could you tell me what that means?

#10 IanXT4

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Posted 04 May 2012 - 02:46 PM

To Save everyone reading the picture at 90 degrees I have typed it out

3 faults found

Code001:
31 FR Wheel VSS Signal abnormal

Code002:
32 FL Wheel VSS Signal abnormal


Code003:
14 Brake master pump relay circuit short to power
1) Motor relay(Stick in on)
2) Circuit and connector between ABS actuator and ECU open and short
3) Module fault

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