ABS myth??? re fault finding. and any tips out there?

[masterbateson]

I have been reading a good few old posts Re ABS in an attempt to get rid of my ABS prob.

Anyhoo, I read in one Post/Thread that you can put a multimeter on the sensor and presumably spin the wheel and get a measurement again presumably in ohms?

I hope this is possible but I am somewhat sceptical and would imagine the ABS sensor feeds back pulses it picks up from the reluctor ring.

Not gone out with meter in hand yet and I am sure I read in another thread where Jim off here commented that thats a load of bull cr@p.

Be very handy if i can test with my meter.
P.s. I already know about the linky in the engine bay diag and the plug you need to pull in the frunk(although seen some peeps say you dont have to remove said plug)

[masterbateson]

Well its off a celica site but i reckon its the same, so maybe i can get the old digi meter out.

http://www.toyotaownersclub.com/forums/ ... agnostics/

[thomp1983]

A meter on continuity should pick up the pulses from the sensor a scope would be better for the job.

Is your abs light on and have you checked for fault codes?

If nothing else you can use the meter to confirm the wiring circuit has no breaks in it

[rgb]

what is your abs problem . read the codes . ive always thought the codes worked

[masterbateson]

as they are wired or configured in pairs in a diagonal as far as Im aware when you get 2 error codes for sensors say nearside front and offside rear, its likely only one sensor has failed.
so at this point if you havent got a spare sensor handy,the only way to check is with a meter or oscilloscope.

But I am going to try that WSS test 1st to see if that helps me track down which is the culprit.

[Dame]

I can confirm that the multimeter trick works - I used it to diagnose mine. In my case I set my meter to continuity mode, and then could here it beeping as I turned the wheel.

However that particular trick may only work with certain multimeters. Mine will show resistance if it doesn't detect 100% continuity so essentially it will show the level of continuity (as resistance) if it isn't 100%. Meters that only beep on 100% might not work.

All should work if you set them to resistance and watch the display - check for a pattern in the readings a bit like testing the lambada sensor.

An oscilloscope would definitely work better for this as it will draw the detected resistance over a time period and you'll be able to see the pulses and check they're firing at the correct rate.

Having said that in my experience the sensor either works or it doesn't. It is a pain that the box can not detect exactly which sensor has failed but can only detect one from a pair that are wired in diagonal, but the multimeter trick should take the guessing element out.

[Dame]

Double post