Electrical noise when brake pedal is pressed...
#1
#4
Thanks and sorry for the delay. My internet access is not doing well.
It is not by the shifter, it is behind the glove box, and happens after the four amigos came up.
It is some clunk noise when pressing the brake pedal, as commanded by the brake switch.
As related information, the wheel speed sensors measured and tested = OK ; the shuttle valve switch measured, tests 3000 ohm = OK.
It is not by the shifter, it is behind the glove box, and happens after the four amigos came up.
It is some clunk noise when pressing the brake pedal, as commanded by the brake switch.
As related information, the wheel speed sensors measured and tested = OK ; the shuttle valve switch measured, tests 3000 ohm = OK.
#5
#6
#7
Thanks.
No tones, just a momentary clunk at pedal pressing.
I have the four amigos after replacing rear brake pads; wheel sensors and shuttle valve switches in the modulator confirmed healthy, by reading resistances and watching sinewave signals entering the Wabco module with an inboard oscilloscope hooked to each wheel twisted pair while driving. (Yes, my thing is electronics)
I suspect it has to be related to pushing back the calipers for brake pads insertion, as nothing else was mishandled.
Finding/buying the ABS error code reader has not happened yet. I do not know if the problem has gone away by itself, Disco2 works and brakes fine, but the amigos are latched and need reading/clearing.
If there was a way to reset the Wabco module would be great, as disconnecting battery does not clear it nor the 'amigos' status as it does with the ECU.
No tones, just a momentary clunk at pedal pressing.
I have the four amigos after replacing rear brake pads; wheel sensors and shuttle valve switches in the modulator confirmed healthy, by reading resistances and watching sinewave signals entering the Wabco module with an inboard oscilloscope hooked to each wheel twisted pair while driving. (Yes, my thing is electronics)
I suspect it has to be related to pushing back the calipers for brake pads insertion, as nothing else was mishandled.
Finding/buying the ABS error code reader has not happened yet. I do not know if the problem has gone away by itself, Disco2 works and brakes fine, but the amigos are latched and need reading/clearing.
If there was a way to reset the Wabco module would be great, as disconnecting battery does not clear it nor the 'amigos' status as it does with the ECU.
#9
I believe its the neutral safety switch on the transmission. I hear the exact same thing when in park, but not in drive.....
Last edited by dgi 07; 12-06-2012 at 10:28 AM. Reason: Spelling
#10
If it's the "BRAKE" light, then this isn't an amigo.
The three amigos are called as such because they all rely on the ABS system to be functioning properly. If there's an error condition with the ABS system, it will cause render the hill descent and traction control features inop as well.
The BRAKE light indicates two things:
- Your parking brake is engaged.
- You are dangerously low on brake fluid.
The three amigos are called as such because they all rely on the ABS system to be functioning properly. If there's an error condition with the ABS system, it will cause render the hill descent and traction control features inop as well.
The BRAKE light indicates two things:
- Your parking brake is engaged.
- You are dangerously low on brake fluid.
Thread
Thread Starter
Forum
Replies
Last Post
rreinholt
Discovery II
4
10-10-2013 08:47 AM
Butthump
Discovery II
4
01-12-2013 01:52 PM