VW sends the EPA data showing that Bosch computer firmware version 27.2934.378.b fixes the problem. EPA agrees, orders the recall.
VW does the recall, flashed the EEPROM and installs the new firmware.
Mary American takes her VW to emissions-check place. ODBII computer interrogates the Bosch computer - "what firmware version are you?". "27.2934.378.b"
Ok, that's proof the fix was done.
Tester checks the other stuff, M.A. pays the fee and gets her sticker.
Just a guess though.
Cheers,
Scott.
VW does the recall, flashed the EEPROM and installs the new firmware.
Mary American takes her VW to emissions-check place. ODBII computer interrogates the Bosch computer - "what firmware version are you?". "27.2934.378.b"
Ok, that's proof the fix was done.
Tester checks the other stuff, M.A. pays the fee and gets her sticker.
Just a guess though.
Cheers,
Scott.