Noise from wheel speed

[VtrSp1]

@Adamw ,

i have some noise  from  the fron wheel speed.

The setup is :

- one  single sensor on front axle with 12  teeth trigger  wheel  and  Honeyweel 1GT101DC

-two sensor on rear axle (left and right) with 12 teeth trigger wheel and Honeywell 1GT101DC

For sensor   pin i use the  ecu  sensor ground , the + 12 V from the main rele and the signal to ecu DI.

I don't use a  shielded wire  for this senso because is hall effect and in other setup done work without noise

A few time at 164-165 km/h the front speed sensor have a spike to about 210-215 km/h

and other time random a different speed

What can do this?

 

 

 

[Adamw]

So the rear speeds never spike?  I would say most likely the GT101 is not happy with its target, they can be pretty fussy with target shape, size, squareness etc. 

You could try a ZF GS101202 or GS101201 or a Littelfuse 55505 in its place, these are direct replacements for the GT101 and are generally faster and less fussy.  

[VtrSp1]

Yes the rear speed never spike..

The trigger wheels front and rear are the same . The front trigger is on the medium driveshaft on the engine block.

The rear trigger is on the Hub wheels