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Originally Posted by Demon31
thanks for the info. however i have already been driving around the entire day yesterday, both on streets and on the highway, i dunno if i went at least 60 for 15 mins straight, but it was definitely alot of driving. you think i need more time for it to adjust or could the unit be faulty? i was gonna put my old unit back in to see if it goes back to normal.
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In dense urban areas like New York, you may loose contact of GPS signals.
Hence the wheel pulse input is vital, and also the calibration of the wheel pulse.
You need to go into the Service Menu, and confirm the following:
GPS almanac downloaded? Good is 'yes'
GPS PDOP value? Good is <2, typical is about 1.5
GPS signal strengths of satellites? Good is between 10 and 15, it will vary from satellite to satellite. I generally have 4 satellites with >10 S/N
Wheel pulses? Must change with speed, and show negative when going backwards.
To calibrate the wheel speed pulses requires good GPS reception, good PDOP, and then a few minutes of constant driving - motorway is easiest.
Don't expect calibration to work in the middle of a city! You need a road in a clear area with unobstructed GPS reception
Jochen