Pull down Analog Input of Fury

[powerboy]

I try to apply analog input to special condition (brake pressure sensor and DBW safety condition). 
I need to create possibility fault protection by Virtual Aux, ex An volt 1 < 0.5  or An volt 1 > 4.5.
I test the condition by putting  an on-off switch in line of An volt 1.
Noticeably, after cut off the switch of An volt 1, voltage of An volt 1 swings so long time and not below than 0.5.

I wound like to ask your help about external pull down resistor.
Is 100K or 1 M ohm ok for Fury without trouble to ECU and the sensor?
I knows output impedance of the brake sensor but i don't known input impedance of Analog channels.

Regards

[Adamw]

The max pulldown resistance you can use would be determined by the sensor rather than the ECU.  100Kohm should be fine for most common automotive sensors though.

 

[powerboy]

Thank a lot Adamw