Abs Light And Sensors

[stuarth]

The dashboard light on my 2005 Yaris stays on suddenly. I tested the resistance of the front sensors and they seem to be open (both of them) with infinite resistance. I have not tested the rear ones. It seems pretty odd that both have this problem. Does this mean they are both broken? When I turn the wheels there is obviously no change either.

What else could this be? How and where can I read any codes from the ECU to tell me if this is really a sensor issue or do I have to go to the Toyata garage?

[Madasafish]

The dashboard light on my 2005 Yaris stays on suddenly. I tested the resistance of the front sensors and they seem to be open (both of them) with infinite resistance. I have not tested the rear ones. It seems pretty odd that both have this problem. Does this mean they are both broken?

I assume you disconnected them both and tested the connectors on the wheel side? It is sometimes possible you have not made a good connection... and get infinite resistance...I would expect the passenger side one to fail... not the driver side.. Recheck again.. Both with broken circuits sounds implausible.

When I turn the wheels there is obviously no change either.

What else could this be? How and where can I read any codes from the ECU to tell me if this is really a sensor issue or do I have to go to the Toyata garage?

You need a code scanner to read ABS faults...

[stuarth]

Interesting! I disconnected them and tested their resistance and find the driver side is around 1400 ohms but the passenger side is infinite. Looks like this one needs replacing but I am intrigued as to why you guessed this one would be bad? Any reason?

[acetip]

Interesting! I disconnected them and tested their resistance and find the driver side is around 1400 ohms but the passenger side is infinite. Looks like this one needs replacing but I am intrigued as to why you guessed this one would be bad? Any reason?

the passenger side wheels get more water on them as there more puddles on he side of a road than in the middle

due to the road cambers.

peter.

[gar]

And remember, if the light is on, it is very likely you wont have ABS working so may be more likely to skid.

It might make a difference too, in the event of an insurance claim!

[Madasafish]

As acetip says, passenger side gets more crud and water and grit chucked up at them.

First port of call with ABS issues...

[stuarth]

Changed the passenger side sensor and all is well.

Thanks for the advice