Abs Wheel Sensors

[ROLAND]

Anyone Know How To Test Abs Ii Wheel-speed Sensors W/o Just Replaceing Them When Ride-off Test Shows Problem "may" Be The Sensor At Ft. Or Rear ? Haynes And Clymer Manuals Don't Go That Far In Trouble-shooting The System When Light Flash Alternately.

[bmwmick]

Anyone Know How To Test Abs Ii Wheel-speed Sensors W/o Just Replaceing Them When Ride-off Test Shows Problem "may" Be The Sensor At Ft. Or Rear ? Haynes And Clymer Manuals Don't Go That Far In Trouble-shooting The System When Light Flash Alternately.

Put an ohmmeter on each of them. They should read approximately 135 Ohms.
You should also check the clearance, 0.50-0.55mm rear and 0.45-0.55 front.

[ROLAND]

Clearances Were Ok And Ft.sensor Was 135,rear Was 124.5.............is That Ok ? From What I've Found Out,if The Fault Occurs When You Ride Away As My Bike Does, It's The Sensors Or The Modulator.
The Modulator Is The "pump" Right ? ...................and Very Pricey !
Thanks For Advice,i'm Out Of Ideas.

[bmwmick]

Clearances Were Ok And Ft.sensor Was 135,rear Was 124.5.............is That Ok ? From What I've Found Out,if The Fault Occurs When You Ride Away As My Bike Does, It's The Sensors Or The Modulator.
The Modulator Is The "pump" Right ? ...................and Very Pricey !
Thanks For Advice,i'm Out Of Ideas.

Roland,
Yes, 124.5 is within the acceptable tolerance I'm afraid. You need to do a readout of the fault and see what code you have. http://www.largiader.com/abs/absfault.html has a very easy to understand procedure. If the Pump assembly itself is bad, you may be able to find a good one at a salvage yard or place an ad here: http://www.ibmwr.org/marketplace

If you find a good pump but with the wrong electronics, you CAN swap your electronics (it just plugs in) to the good pump.

Send me an Email if you need specifics beyond this.