Hello Ray and others,

I'd say I'm about 95% sure that it is done thru the OBDII port as I described earlier and I'll tell you why. Reseting the service reminder (the SRI) is an issue that bubbles up here and on other Volvo forums every so often. At those times, many posting appear and the procedures are told and retold about clearing the light for newer volvos (using the trip odom. and ign. switch) and for older OBD1-equipped vehicles (pressing some buttons on the ECU under the hood). However, many posters here have said that '96-'97 850s and '98 70-series owners are screwed because there is NO way to do it other than with a dealer scan tool thru the diagnostic connector.

Also there were a number of specific exchanges on this forum about five years ago between Leo Montreuil and Alex C. Peper on this exact topic (check the archives). If you read these postings they leave little doubt that it's done thru the OBD port (although they don't actually give the detailed codes and messages.) Alex Peper went on to release his own OBDII scanner software (avail. at www.obd-2.com) that includes the feature to reset the SRI on the affected volvos.

Several people have written to me in private to say that it was their impression that the codes were obtained with the use of a logical analyser (i.e. a sniffer) since Volvo wasn't about to release the information.

Well, that's more than you probably wanted to know. But, that's why I think I'm on the right track. I'll end with my usual appeal...

I'm certain that somewhere out there is a fellow OBDII enthusiast
that's in the same boat I'm in and has already figured out
the code(s) necessary to reset the service light on the affected
Volvo 850/s70/v70s. I hoping that someone else who's been down this
road before is feeling generous and will share this information. If
you do, you will be answering one of the more frequently asked
questions there is on the Volvo forums.


Much Thanks,

Robert Miller

"Information just wants to be free."