Thanks for the feedback.

I use a Valentine One and have never had an interference problem, probably because in its normal position on the dash near the windscreen, it's too far from the OPDS sensor to bother the fault detector; or maybe the V-1 is well shielded in accordance with good engineering practice. My cell phone has never caused the false alarm either and it's designed to intentionally radiate rf energy, unlike the other "appliances" referred to in the service bulletin which in theory only radiate rf incidental to their primary functions. Most power inverters/converters generate lots of harmonic energy because of the square wave choppers usually employed, but why the OPDS sensor circuit should be particularly susceptible to my laptop is a mystery. The power level is surely small but if the computer is within one inch or so of the passenger seat-back (a position in which it unfortunately naturally tends to settle), it trips SRS-DTC 15-3 with annoying repeatability. Since I can't seem to get the OPDS components adequately shielded or bypassed for rf, guess I'll have to try shielding the computer!

Unfortunately, any experimentation I do that results in a 15-3 fault, requires a trip to the dealer for a reset - unless you know how I can perform the reset myself without a PGM tester or Autoprobe.