ABS coming on - over sensitive!

[LeaUK]

Hi All

My 'other car' has a Bosch ABS system which is giving me a headache in resolving and so I would like to ask the experts here for some friendly advice. Hope you guys don't mind.

Here's the background:

Symptoms
During relatively light braking (say approaching a T junction) the ABS engages as if one were on ice. The hydraulic 'pumping' and ABS sensation can be felt at the wheels. The road surface gives no reason for the ABS to engage.


No ABS fault light

No fault code stored

Two of the toothed ABS sensors had become decoupled from the front drive shaft and was originally thought to be the cause, these were glued back in place but fault remains.

Changed all pads to ensure brakes wern't 'sticking', wheels tested on a test station and brake pressures measure equal forces.

Next thought I had was dropped counts from a sensor at slow speed (sensor's output voltage is proportional to speed), but by using diagnostic equipment which can measure each ABS sensor's count at the I/P to the ABS unit and compare with the other sensors, no count anomalies are shown! ie all counts are the same.

I'm now at a loss as to what else could 'trick' the ABS unit into thinking the car's in a skid??


Any thoughts would be most welcomed.
Lea