Kia Picanto ABS

[Richyvrlimited]

My sister's car is exhibiting behaviour I've not experienced before, the ABS is engaging even on light brake applications.

I've given the brakes a once over, and other than the offside rear handbrake being a bit poor, the brakes generally are fine.

I re-bled the brakes and found quite a bit of air in the system, I think I've got all that out now, but as worried some is trapped in the ABS pump which I've heard can be a bugger to sort out. (pressure bleeder?)

After bleeding whilst the pedal feel was better the ABS issue was still occuring.

What could be the cause? The ABS light is unlit - I've checked the bulb - so I'd written off a failed sensor, but could it have failed in an odd way to cause this issue? If so how would i trace the broken sensor?

[Richyvrlimited]

DuraAce said:

Fault code scan might help, you could also measure the resistance of each sensor, a dodgy one will have a different reading to the others.

Are all the castellated reluctor discs on each hub secure? Sometime they can be rusted and loose etc. This could cause the abs to trigger.

I'll check the trigger wheels are all secure this weekend.

Surely is the resistances of the sensors were different the ABS system would throw a code?