Quote:
Originally Posted by The Sandman
I am curious... I have a 2001 and understand that a stalk or rocker switch is required to be installed in order to even get the temperature reading.
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The OBC is turned on by the dealer with a PIWIS, PST2, or you can do it yourself with a durametric. The switch does not activate the OBC features, and if the OBC is activated without a switch or stalk it will always default to the first "page" which is the exterior temp (EDIT - This is only for earlier cars, see JFP's response below). If you cycled to a different "page" the next time the battery was disconnected it would default back to the first page which is the temp display. A switch is only required if you want to cycle through the other "pages" including avg. MPG, miles to empty, avg. MPH. With 2 switches or the stalk you can also set the speed gong feature.