Volvo RWD 700 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 5/2002 700 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

The end of the ABS saga! 700 1988

posted by  someone claiming to be Volvouser on  Wed Jun 2 11:33 CST 2004 [RELATED]

Hi y'all!

At last I found the fault on my ABS system. As usual, the it was all due to me not being thorough enough when troubleshooting.
I began by measuring the output voltage of the two front sensors using an ordinary digital multimeter. The output was roughly the same, ie 300-500mV. Therefore, I assumed they were both OK. After cleaning both sensors, and still getting a nice tan from the ABS lamp I decided to hook up my oscilloscope and see the quality of the signals. And there it was, the right front sensor didn't output anything at all, but 50Hz hum (probably from the scope). Therefore I measured the resistance of the faulty sensor and found out that it was infinite.
With a lighter wallet and a new sensor on place, the ABS works perfectly now.
Conclusion, always measure the resistance of the sensors. The high input impedance of the DVM fooled me completely. Don't let it fool you!





THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New The end of the ABS saga! [700][1988]
posted by  someone claiming to be Volvouser  on Wed Jun 2 11:33 CST 2004 >


<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.