E46 road speed sensors

Post Fri Apr 02, 2010 10:33 pm

got a prob with spedo dying and coming back on and traction and ABs warning lights etc. but this happens occasisonally when the car is parked up and driven a few hours later its ok

Anyone know of a way of testing them ???
Cheers
Ben

Post Fri Apr 02, 2010 10:56 pm

you should be able to scope each wheel sensor should have a nice square waveform you ll be able to spot if one is different think the speedo signal is back right wheel not sure though

Post Sat Apr 03, 2010 12:14 am

Have a look here Ben

http://spaghetticoder.org/bmw/wds/e46/

Post Sat Apr 03, 2010 3:39 am

cheers Barry much niceness will have butchers once it stops bloody raining

Post Sat Apr 03, 2010 6:18 pm

Barry how do you use that web site cant seem to get it to work

Post Sat Apr 03, 2010 6:27 pm

Click on the tabs on the right, complete vehicle, chassis etc.

Post Sat Apr 03, 2010 8:00 pm

yes done that but it don't want to show me the diagrams keeps asking to downloads a Svg file

Post Sat Apr 03, 2010 8:01 pm

Hmm, works ok for me. Im no computer expert so i cant say why its not working for you.

Post Sat Apr 03, 2010 8:08 pm

fowler wrote:yes done that but it don't want to show me the diagrams keeps asking to downloads a Svg file

i think it needs java to run

Post Sat Apr 03, 2010 8:46 pm

got java installed gents

Post Wed Apr 07, 2010 9:44 pm

got a problem with this still comes and goes when it feels like the ABS & traction control light is on the dash and handbrake/brake warning light is on and speedo stops working but then come back on.
The car today was driven 20 odd miles and then left all day and as soon as the car was started back this afternoon the fault had returned. yes the car was out in the rain ??????
ANY ONE GOT any ideas before i rip the car apart ..........

Post Wed Apr 07, 2010 9:59 pm

Have you plug any diagnostic equipment into it Ben? If so, what faults were stored?

Post Wed Apr 07, 2010 10:08 pm

yes brings up rear wheel sensor, front wheel sensor abs, ABS valve not operating loads of spurious shite barry
Ripping the sensors out again tomorrow, but one minute it works then the next it don't
i know its a latch fault but i need to know what sensor is screwed before i lob out a load of dosh on 4 new sensors.
I have heard ABS pumps do fail on these..

Post Thu Apr 08, 2010 7:36 pm

the abs/dsc modules can be troublesome too, and can give the same issues you have mentioned

Post Fri Apr 09, 2010 4:11 pm

oh deep joy !!!!

Any more recommendations folks as its driving me up the Wall