I have a 2001 Cadillac STS with rear-view mirror integrated compass. The
compass direction seems generally inaccurate. A slight turn changes the
compass from NW to SW (while still heading northward). Some directions like
N or S are hard to lock in. I haven't noticed the compass to be 180' out,
but it's not that useful.
Is there a way to calibrate the compass? Is this how the compass fails?
(Back for warranty..)
I had to do this to a customers Jimmy once, you had to press down the US/MET
and MODE button together for like 10 seconds, then it would show on the
display MVAR which stands for magnetic variance. What happens is magnetic
north is not the same as true north, and depending on where your at in the
globe, effects how far off it is. Anyways, this lady felt that when she was
driving "north" on the road, it should show "north" except it showed NE,
which is really the true direction of magnetic north, This is the way it had
been before it had come in for service, and with the battery disconnected,
now it wasnt showing the right direction to her. So being the incredibly
smart person I am, she had mentioned she was from california, so I looked it
up and set her magnetic variance over to the california number, Another
happy (though blissfully ignorant) customer. I'm looking on the net for the
instructions, but I'm not finding them, might have to run it by a nice
There is a procedure for setting the compass to correct for your region.
Magnetic north and true north differ and the difference varies by location.
It is quite possible that your compass thinks you are in Florida when you
are in fact in New Mexico (or some such ... I don't know!).
If you get your hands on the owners manual it should have the region setting
procedure in there.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.