Hi Jeff there are two methods depends on year of car
up to 1999
switch ignition on press and hold in trip reset button for 12 sec's service indicator will flash release trip reset button within 4 sec's an audible signal when reset
2000 +
switch ignition off
press and hold in trip reset button
switch ignition on keep button held for 10 sec's
service indicator will flash
release button within 4 sec's
an audible signal when reset
If reset button is not released within 4 sec's the service indicator will not be reset but will stop flashing
nigel, August 2007